DESCRIPTION
ENERGY DISSIPATING METAL PLATE AND BUILDING STRUCTURE
5 TECHNICAL FIELD
[0001]
The present invention relates to an energy dissipating metal plate which joins a
pair of target members and which exhibits energy dissipating performance corresponding
to a relative displacement between the target members, and a building structure provided
10 with the energy dissipating metal plates.
BACKGROUND ART
[0002]
In recent years, in response to increasing awareness about disaster prevention,
15 there are an increasing number of building structures such as houses and apartments that
employ a damage control structure for suppressing seismic shocks at a time of an earth
quake with use of an energy dissipating fuse. As an example of the energy dissipating
fuse used for the type of energy dissipating structure, a number of building structures
employ a steel fuse which dissipates vibration energy in the hysteresis due to yielding
20 and plasticizing of a steel material when the steel material is compressed or tensiled,
since it exhibits a high level of energy dissipating performance at low cost. Among
steel fuses, a buckling restricted brace, which resists axial force; is a most prevailing steel
fuse since it has a simple mechanism and can be designed easily. Examples of steel
fuses other than the buckling restricted brace include a fuse that uses a base plate and a
25 joint metal.
2
[0003
For example, Patent Document 1 discloses a damage control structure in which a
base plate fuse is arranged between a pedestal part of pillar and a foundation portion.
When a tensile force acts on the pillar, a flexural yielding or a shear yielding of the base
5 plate occurs. The tensile force occurring in the pedestal part of pillar is dissipated by
energy of deformation hysteresis at the time, and an energy dissipating functionality
being exhibited.
[0004]
Moreover, Patent Document 2 discloses a technique such that the fuse steel plate
10 is a shape that flexural-shear-yields so that even if the fuse steel plate receives a cyclic
load after having shear-yielded, increase in the shear proof stress thereof can still be
suppressed.
[0005]
Incidentally, in order to improve damage control performance of a building
15 structure part, it is effective to utilize relative displacement between target members for
dissipating vibrations. Therefore, other than the above fuse mechanism, it may be
considered that with use of relative displacement between a foundation and a continuous
footing or between a wall panel layer and a floor panel layer, the fuse is moved to
dissipate vibrations and dissipate vibration energy. However, techniques disclosed in
20 Patent Documents 1 and 2 have a problem in that they are not premised to be arranged in
an extremely narrow gap such as the gap between the foundation and the continuous
footing and/or the gap between the wall panel layer and the floor panel layer, and
therefore, vibration energy in the type of narrow place cannot be dissipated.
[0006]
25 If a part of a fuse is inserted between the target members that displace relatively
3
to each other, a rigidity of inserted portion of the fuse becomes higher than that of
non-inserted portion of the fuse. As a result, while a relative displacement of the part in
which the fuse is inserted becomes smaller, a relative displacement of the part in which
the fuse is not inserted becomes greater, and therefore, the vibration energy may not be
5 efficiently dissipated in some cases. Therefore, it is important to insert the fuse evenly
across the entire portion that would have relative displacement therein.
[Prior Art Documents]
[Patent Documents]
[0007]
10 [Patent Document 1] Japanese Unexamined Patent Application, First Publication
No. 2004-092096
[Patent Document 2] Japanese Unexamined Patent Application, First Publication
No. 2008-111332
15 DISCLOSURE OF INVENTION
[Summary of Invention]
[Technical Problem]
[0008]
Consequently, the present invention takes into consideration the above problems,
20 with an object of providing: an energy dissipating metal plate which is joined between a
pair of target members and which exhibits an energy dissipating performance
corresponding to a relative displacement between the target members, wherein, in
particular, the energy dissipating metal plate can be arranged in an extremely narrow gap
and can be applied to various locations of a building structure; and a building structure
25 which uses the energy dissipating metal plate.
4
[Solution to Problem]
[0009]
In order to solve the above problems and achieve the above object, the present
invention employs the following configurations. That is to say:
5 (1) The energy dissipating metal plate according to the present invention is an
energy dissipating metal plate which joins a pair of target members and which exhibits
energy dissipating performance corresponding to a relative displacement between the
target members, the energy dissipating metal plate including: a first joint part to be joined
to one of the target members; a second joint part to be joined to other of the target
10 members; and vibration dissipating parts which are provided on a transmission path of a
tensile force and a compression force between the first joint part and the second joint
part, and which have slits, wherein each of the first joint part and the second joint part is
formed in a strip shape substantially parallel to a direction of the relative displacement.
[0010]
15 (2) The energy dissipating metal plate according to (1) may be a single plate to
be located between the target members so that a front surface comes in contact with one
of the target members while a back surface comes in contact with the other of the target
members.
[0011]
20 (3) In the energy dissipating metal plate according to (1), the first joint part may
be provided in a form of two lines via the vibration dissipating part, in substantially
axisymmetric positions centered on the second joint part.
[0012]
(4) In the energy dissipating metal plate according to (3), a configuration such
25 that: when seen along the direction of the relative displacement, a length of the first joint
5
part is longer than a length of the second joint part; and the end parts of the first joint
parts in the form of two lines are joined, may be employed.
[0013]
(5) In the energy dissipating metal plate according to (1), the energy dissipating
5 metal plate may be precipitation-hardened or trip-processed so that a ratio of yield proof
stress to a maximum proof stress is equal to or more than 4/5.
[0014]
(6) In the energy dissipating metal plate according to (1), at least one of the first
joint part and the second joint part may be reinforced along the direction of the relative
10 displacement by a reinforcement member.
[0015]
(7) In the energy dissipating metal plate according to (1), a configuration such
that: a first insertion hole into which a first fastener that joins the first joint part to the one
of the target members is inserted is formed in the first joint part, while a second insertion
15 hole into which a second fastener that joins the second joint part to the other of the target
member is inserted is formed in the second joint part; and at least one of the first
insertion hole and the second insertion hole is a long hole which extends in a direction
substantially orthogonal to the direction of the relative displacement, may be employed.
[0016]
20 (8) In the energy dissipating metal plate according to (1), a configuration such
that: a pair of the vibration dissipating parts are provided adjacent to both sides of the
second joint part; a pair of the first joint parts are further provided adjacent to the outer
side of the vibration dissipating parts; and the transmission path is a path that connects
the first joint part and the second joint part via the vibration dissipating parts, may be
25 employed.
[0017
(9) In the energy dissipating metal plate according to (1), a configuration such
that: a pair of the vibration dissipating parts are provided adjacent to both sides of the
second joint part; a pair of extension parts that extend from the outer side of the vibration
5 dissipating parts along the direction of the relative displacement are further provided; the
first joint part is provided so as to be continuous with the extension parts; and the
transmission path is a path that connects the second joint part, the vibration dissipating
parts, the extension parts, and the first joint part, may be employed.
[0018]
10 (10) The building structure according to the present invention is provided with
the energy dissipating metal plate according to any one of (1) to (9) above.
[0019]
(11) In the building structure according to (10), a configuration such that: the
building structure further includes a continuous footing and a foundation of a building
15 upper frame; and in a state where the energy dissipating metal plate is located between
the continuous footing and the foundation, the first joint part is joined to either one of the
continuous footing and the foundation, and the second joint part is joined to the other of
the continuous footing and the foundation, may be employed.
[0020]
20 (12) In the building structure according to (10), a configuration such that: the
building structure further includes a wall frame and a beam of a floor; and while the
second joint part is joined to the wall frame, the first joint part is joined to the beam, may
be employed.
[0021]
25 (13) In the building structure according to (10), a configuration such that the
7
building structure further includes an energy dissipating fuse which is arranged within a
section formed by a plurality of steel pipe pillars and which has a plurality of braces; and
the energy dissipating metal plate is provided at least one of a joint location between the
steel pipe pillars and the braces and the joint location between the braces, may be
5 employed.
[Advantageous Effects of Invention]
[0022]
According to the energy dissipating metal plate according to (1), it is provided
on the transmission path of tensile force and compression force between the first joint
10 part and the second joint part and the vibration dissipating parts having the slits is
flexurally yielded to be plastically deformed in early, and thereby, it is possible to exhibit
stable deformation energy dissipating performance with an increase in proof stress being
suppressed. By making the energy dissipating metal plate exhibit the energy dissipating
performance corresponding to the relative displacement between the target members, the
15 damage control function can be effectively exhibited in the building structure in which
the energy dissipating metal plate is arranged.
In particular, in the present invention, as described in (2), in the case where it is
the single plate to be located between the target members, it can be installed in a narrow
gap into which it could not be inserted up until now, and further, it can be applied to
20 various locations of the building structure.
[0023]
Moreover, in the present invention, in the case where the length of the vibration
dissipating part in the direction orthogonal to a direction of the relative displacement is
made longer than a predetermined dimension, bending moment, which occurs to both
25 ends of the energy dissipating metal plate, can be made greater, and it is possible to easily
8
make the vibration dissipating part yield flexurally. On the other hand, in the case
where the length of the vibration dissipating part in the direction orthogonal to the
direction of the relative displacement is made shorter than the predetermined dimension,
the vibration dissipating part is yielded with the shearing force that occurs in the
5 vibration dissipating part. Ideally, it is preferable that the shape of slit hole is a
substantially rhombic shape so that a flexural yielding or a shear yielding of the vibration
dissipating part occurs.
Furthermore, in the case where precipitation-hardening or TRIP processing
(processing a metal plate having transformation-induced plasticity) is performed so that
10 the ratio of the yield proof stress to the maximum proof stress is equal to or more than
4/5 as with the energy dissipating metal plate described in (5), plastic deformation due to
flexural yielding and shear yielding can be easily made to occur over a wide range in the
vibration dissipating part. As a result, it is possible to reliably obtain the effect of the
present invention described above.
15 According to the building structure described in (10), it is possible, by providing
the energy dissipating metal plate described in (1), to increase the level of damage
control performance thereof.
BRIEF DESCRIPTION OF THE DRAWINGS
20 [0024]
FIG. 1 is a front view showing an embodiment of an energy dissipating metal
plate of the present invention.
FIG. 2A is a side view showing an attachment example of the energy dissipating
metal plate.
25 FIG 2B is a side view showing another attachment example of the energy
9
dissipating metal plate.
FIG 3A is a front view for describing an operation of the energy dissipating
metal plate.
FIG 3B is a front view for describing an operation of the energy dissipating
5 metal plate.
FIG 3C is a front view for describing an operation of the energy dissipating
metal plate.
FIG 4A is a graph showing the results of a cyclic load test in a case where the
major axis of the slits of the energy dissipating metal plate is made long in the B
10 direction indicated in FIG 3A.
FIG. 4B is a graph showing the results of a cyclic load test with an energy
dissipating metal plate of a comparative example.
FIG 5 is a vertical sectional view of a portion of a building structure according
to the embodiment, spanning from the continuous footing to the foundation of the
15 building. In the figure, in order to show the relative position relationship between the
fasteners, the fasteners that are actually separately-displaced in the page surface depth
direction are also shown on the sectional plane.
FIG 6 is a C-C sectional view of FIG 5. In the figure, in order to show the
relative position relationship between the fasteners, the fasteners that are actually
20 separately-displaced in the page surface depth direction are also shown on the sectional
plane.
FIG 7 is a figure for describing the operational advantage of the energy
dissipating metal plate of the present embodiment.
FIG 8 is a figure showing a modified example of the energy dissipating metal
25 plate, being a front view showing a case where the insertion hole of fastener on the first
10
joint part side is lengthened in the B direction.
FIG 9A is a front view showing an example of a building structure in which the
energy dissipating metal plate of the present embodiment is arranged.
FIG 9B is a D-D sectional view of FIG 9A.
5 FIG. I OA is a side view showing another example of a building structure in
which the energy dissipating metal plate of the present embodiment is arranged.
FIG I OB is a side view showing still another example of a building structure in
which the energy dissipating metal plate of the present embodiment is arranged.
FIG 11 is a side view showing still another example of a building structure in
10 which the energy dissipating metal plate of the present embodiment is arranged.
FIG 12A is a figure showing still another example of a building structure in
which the energy dissipating metal plate of the present embodiment is arranged, being a
perspective view showing a state of being applied to a connection between steel pipe
pillars.
15 FIG 12B is a side view seen from the E direction of FIG. 12A.
FIG. 12C is a figure showing still another example of a building structure in
which the energy dissipating metal plate of the present embodiment is arranged , being a
perspective view showing a state of being applied to a beam joint.
FIG. 13 is a figure showing still another example of a building structure in which
20 the energy dissipating metal plate of the present embodiment is arranged, being a front
view showing an example of an energy dissipating fuse.
FIG 14A is a figure showing a configuration of an attachment to the joint part
on one end side of the energy dissipating fuse , being an enlarged view of part F in FIG.
13.
25 FIG 14B is a figure showing a joint mode of the energy dissipating metal plate
11
between adjacent braces, of the energy dissipating fuse, being an enlarged view of part G
in FIG 13.
DESCRIPTION OF EMBODIMENTS
5 [0025]
Hereunder, as an embodiment of the present invention, an energy dissipating
metal plate which joins a pair of target members and which exhibits energy dissipating
performance corresponding to the relative displacement between the target members, is
described in detail, with reference to figures.
10 [0026]
A configuration of an energy dissipating metal plate 1 of the present
embodiment is shown in FIG 1. The energy dissipating metal plate 1 is such that in a
single metal plate 41 serving as a base, there are formed slits 65 (insertion holes) of a
predetermined shape, and there are allocated joint parts 46 and 47 to be attached to the
15 target members. It is assumed that the energy dissipating metal plate 1 joins a pair of
the target members. The target members of the present embodiment are one of the
constituents of a building structure. However, the energy dissipating metal plate 1 of
the present embodiment may be applied to a joint for other purposes also.
[0027]
20 The target members of the present embodiment may be such that, as shown in
the side view of FIG 2A, both of one target member 42 and the other target member 43
are positioned on one face side with respect to the energy dissipating metal plate 1, or as
shown in the side view of FIG. 2B, the one target member 42 and the other target member
43 are positioned on both face sides so as to sandwich the energy dissipating metal plate
25 1 therebetween.
12
In both cases, the one target member 42 and the other target member 43 are
displaced relatively to each other along a relative displacement direction A in the event of
an earthquake, etc. The energy dissipating metal plate 1 is attached on the face of one
target member 42 and on the face of the other target member 43, which are relatively
5 displaced along such a relative displacement direction A. The energy dissipating metal
plate 1 exhibits the energy dissipating performance corresponding to the relative
displacement caused by vibration along th(- direction of the relative displacement A
between both of the target members 42 and 43.
[0028]
10 Returning to description of FIG. 1, the energy dissipating metal plate I to be
attached to the pair of the target members 42 and 43 is such that a pair of first joint parts
46 to be joined with the one target member 42 and a second joint part 47 to be joined
with the other target member 43 are respectively allocated substantially parallel with
each other in a long strip form along the direction of the relative displacement A, on the
15 single metal plate 41. Between the first joint parts 46 and the second joint part 47, there
is respectively formed a damping part 48 (vibration dissipating part) for suppressing an
increase in a proof stress after yielding.
[0029]
The first joint parts 46 are formed so that a plurality of circular holes 46h are
20 arranged in a form of line and the first joint parts 46 are allocated in two lines in
positions substantially line-symmetric with each other about the second joint part 47.
That is to say, the first joint parts 46 are allocated at both ends along a substantially
orthogonal direction B, which is substantially orthogonal to the direction of the relative
displacement A. The second joint part 47 is positioned at the center of the joint parts
25 46. Since the first joint parts 46 are arranged via the damping parts 48 with respect to
13
the second joint part 47, the damping parts 48 are also allocated at the positions
substantially line-symmetric with each other about the second joint part 47.
[0030]
The first joint parts 46 are regions for being joined to the target member 42 with
5 fasteners (fastening members such as bolts, drill screws, screws, and nails). The first
joint parts 46 are not limited to specific configurations such as fastener insertion holes,
and they may be pre-allocated planar regions where fasteners are absolutely scheduled to
be fixed thereon when being attached to the target member 42. That is to say, in the
case where the drill screws or the nails capable of fixing the first joint part 46 with their
10 sharp tip end by passing therethrough in the plate thickness direction thereof to the target
member 42 are employed as fasteners, it is not necessary to pre-form the fastener
insertion holes in the first joint part 46. In the case, the flat region for the drill screws or
the nails, which serve as fasteners, to pass therethrough serves as the first joint part 46,
and by boring the flat region with fasteners, it is possible to form the fastener insertion
15 holes and attach the fasteners simultaneously.
Moreover, in the case where the first joint parts 46 are assumed to be joined by
screwing the fasteners into the target member 42, the first joint parts 46 may be
configured as insertion holes for inserting the fastener. In either case, the first joint
parts 46 are allocated so as to be vertically long along the direction of the relative
20 displacement A (in other words, so as to be formed in a strip shape along the direction of
the relative displacement A). In reality, the direction of the relative displacement A is
determined according to the arrangements of the target members 42 and 43 to be
attached. In a state in which the extending direction of the strip shape formed by the
first joint part 46, which is preliminarily allocated in a strip form, is positioned so as to
25 align with the direction of the relative displacement A of the target members 42 and 43,
14
the energy dissipating metal plate 1 is attached to the target members 42 and 43.
[0031]
The second joint part 47 is a region for being joined to the target member 43
with the fasteners (the fastening members such as the bolts, the drill screws, the screws,
5 and the nails). The second joint part 47 is configured with a plurality of fastener
insertion holes 49 that pass through the metal plate 41 with the major axis thereof being
along the above B direction.
Meanwhile, the second joint part 47 is not limited to the above case of being
configured with the long circular fastener insertion holes 49, and may be configured with
10 normal circular fastener insertion holes 49. Moreover, the second joint part 47 is not
limited to specific configurations such as the fastener insertion holes 49, and may be
pre-allocated planar regions where the fasteners are absolutely scheduled to be fixed
thereon when being attached to the target member 43. The point is the same as the
description of the first joint part 46, and therefore, the description of this is omitted here.
15 In either case, the second joint part 47 is allocated so as to be vertically long toward the
direction of the relative displacement A (in other words, so as to be formed in a strip
shape along the direction of the relative displacement A). For example, if the fastener
insertion holes 49 are formed at a plurality of locations at predetermined intervals along
the direction of the relative displacement A, the second joint part 47 is embodied as a
20 mode where it is allocated in a strip shape in the direction of the relative displacement A.
[0032]
The damping parts 48 of two lines are each configured as lines of a plurality of
slits 65. The slits 65 are such that several of them are at least formed in a line form at
predetermined intervals along the direction of the relative displacement A. Meanwhile,
25 the arrangement intervals of the slits 65 are not limited to the case of being regular
15
intervals, and they may be random intervals.
[0033]
The slits 65 maybe any shape. However, it is preferably a shape with a major
axis being along the direction B. Moreover, although FIG. 1 shows, as an example, a
5 case of the configuration with rhombus-shaped slits 65, it is not limited to the shape, and
it may be configured with a rectangular shape, another polygonal shape, or an
indeterminate shape.
By providing the type of slits 65 in the damping part 48, the yield strength of at
least the damping part 48 can be made lower than that of other locations. Incidentally,
10 among the slits 65 of two-lines, the slits 65 positioned at both ends of the direction of the
relative displacement A are configured to be connected with each other and as being slits
65a and 65b with a major axis thereof being along the B direction.
[0034]
Next, an operation of the energy dissipating metal plate 1 is described. In the
15 energy dissipating metal plate 1 configured as described above, while the first joint parts
46 are attached to the target member 42 with the fasteners (not shown in figure), the
second joint part 47 is attached to the target member 43 with the fasteners (not shown in
figure). In a case where a force caused by earthquake or the like acts on the building
structure, the target members 42 and 43 are displaced relatively to each other along the
20 direction of the relative displacement A. When vibration occurs in the direction of the
relative displacement A, momentarily, for example as shown in FIG. 3A, the target
member 42 is displaced in the at direction and the target member 43 is displaced in the
a2 direction.
At this time, the first joint part 46 attached to the target member 42 is also
25 displaced in the al direction. On the other hand, the second joint part 47 attached to the
16
target member 43 is displaced in the a2 direction. Asa result, in the first joint part 46,
stress GE is transmitted in the direction shown with the small arrows in FIG. 3A. In each
process of the stress GE being transmitted, at positions where the slits 65 are formed, a
compression stress from the slit 65 adjacent to one side thereof is transmitted, and a
5 tensile stress is transmitted toward the position where the slit 65 adjacent to the other side
thereof is formed. Consequently, the each moment is cancelled. In this way, the stress
aE is sequentially transmitted and the compression force is eventually transmitted to the
slit 65a side.
As a result, at the lower end part 52 of the energy dissipating metal plate 1, the
10 two-lines of first joint parts 46 attempt to move away from each other along the B
direction, and as shown in FIG 3A, stress aF for suppressing it is transmitted along the B
direction and in the direction opposing to each other. Since the stress aF is transmitted
from the end parts of the two-lines of first joint parts 46 in the directions opposing to
each other, they offset each other just at the substantially center of the lower end part 52.
15 Moreover, also in the upper end part 51, similarly, stress GG is loaded in directions
opposing to each other along the B direction, and therefore, they are cancelled by each
other.
[0035]
That is to say, in the case where the target members 42 and 43 are relatively
20 displaced from each other along the direction of the relative displacement A, the energy
dissipating metal plate I can still offset the stress GE and stress aF within the energy
dissipating metal plate 1 even if the stress aE and the stress aF based on the relative
displacement are transmitted. Furthermore, also in the case where the target member 42
shifts in the a2 direction of FIG 3A and the target member 43 is displaced in the at
25 direction, when observing momentarily, the direction of the arrows of the stress vectors
17
mentioned above is simply reversed from the direction shown in FIG 3A, and as
expected, the stress can offset each other within the energy dissipating metal plate 1.
[0036]
Moreover, stress GLI is loaded on the second joint part 47 of the energy
5 dissipating metal plate 1 according to the displacement of the target member 43. As a
result, as shown in FIG 3A, shear stress occurs between the stress 6E loaded on the first
joint part 46 and the stress 6H loaded on the second joint part 47. Furthermore, bending
moment based on the shear deformation is loaded on the damping parts 48, which serve
as the joint parts between the first joint parts 46 and the second joint part 47. When the
10 bending moment becomes greater than a predetermined value, the damping parts 48
flexurally yields. In addition, in damping parts 48, with the shape of the slit 65 made
oval with the major axis being along the B direction, the damping parts 48 can be set to
flexurally yield along the direction of the relative displacement A according to the
relative displacement between the target members 42 and 43. As a result, in the present
15 embodiment, it is possible to realize the specific effect described below.
[0037]
FIG 3B shows a case where the stress 6H is loaded as a result of the
displacement of the target member 43 with the first joint parts 46 being fixed ends.
Moreover, FIG 3C shows a case where stress -6H is loaded as a result of the displacement
20 of the target member 43 with the first joint parts 46 being fixed ends. The second joint
part 47 deforms upward in the figure in the case of FIG 3B, and it deforms downward in
the figure in the case of FIG 3C. That is to say, the position of the second joint part 47
is displaced relatively to the first joint parts 46, and the shape of the slits 65, 65a, and 65b
also deforms upwardly/downwardly according to the displacement. When the type of
25 cyclic displacement occurs in the upward/downward directions of the second joint part
18
47, the damping parts 48 flexurally yields, and the energy dissipating metal plate 1 is
plasticized to perform energy dissipating. Also in the case, the stress 6F and the stress
6G are offset with the above mechanism at both of the upper end part 51 and the lower
end part 52.
5 [0038]
FIG. 4A shows the results of a cyclic load test with use of the energy dissipating
metal plate 1 of the present embodiment in which the slits 65 has a major axis which is
along the B direction indicated in FIG 3A, and FIG 4B shows the results of cyclic load
test of a steel plate prepared as a comparative example. Incidentally, in the steel plate of
10 the comparative example, although the same material as that of the energy dissipating
metal plate 1 is used, there is no slit 65 provided therein, and in addition, a rib is
provided at the upper and lower end edges of the steel plate so that it would not flexurally
yield.
[0039]
15 It can be understood from FIG. 4A that in the energy dissipating metal plate 1 of
the present embodiment, an increase in the proof stress is suppressed, a hysteresis loop
with a great area is drawn, and a high level of hysteresis dissipation can be obtained. In
contrast, in the comparative example of FIG 4B, it can be understood that the proof
stress increases.
20 [0040]
Based on this, in the energy dissipating metal plate 1 of the present embodiment,
by making the damping parts 48 flexurally yield early, it is possible to cause plastic
deformation to occur, and thereby stable deformation energy dissipating performance can
be exhibited while an increase in the proof stress is suppressed. By having the energy
25 dissipating metal plate I exhibit energy dissipating performance corresponding to the
19
relative displacement between the target members 42 and 43, it is possible to have the
building structure with the energy dissipating metal plate 1 arranged therein exhibit a
damage control function.
[0041]
5 Furthermore, in the present embodiment, as the metal plate 41 that configures
the energy dissipating metal plate 1, there may be used a steel plate that has been
precipitation-hardened or trip-processed so that a ratio of yield proof stress, which is a
ratio of yield proof stress to maximum proof stress, is equal to or more than 4/5. In this
case, the plastic deformation region due to the flexural yielding can be expanded in the
10 damping parts 48 without providing the slits 65, and it is possible to realize the effected
described above.
[0042]
Meanwhile, only the fastener insertion holes 49 of the second joint part 47 were
provided as long holes. However, it is not limited to the configuration, and only the
15 fastener insertion holes in the first joint parts 46, or the fastener insertion holes in both of
the first joint parts 46 and the second joint part 47 may be provided as long holes that are
long along the substantially orthogonal direction B. In this case, unwanted stress would
not occur in the damping parts 48, which serves as a vibration dissipating part, when the
target members 42 and 43 shift relatively along the substantially orthogonal direction B.
20 [Example 1]
[0043]
FIG. 5 is a figure showing Example 1 of the present invention, showing an
example of a building structure 5 having the above energy dissipating metal plate 1
arranged therein. To describe in more detail, an enlarged view of a vertical sectional
25 configuration in the building structure 5 spanning from a continuous footing 81 to a
20
foundation 82 of the building structure 5 is shown. Moreover, FIG 6 shows a C-C
sectional view of FIG 5. Furthermore, FIG. 7 shows a specific mode where the energy
dissipating metal plate 1 is arranged in the building structure 5.
[0044]
5 The building structure 5 of the Example 1 is provided with the continuous
footing 81 and the foundation 82 arranged on the continuous footing 81. Furthermore, a
horizontal frame 83 which extends in the horizontal direction and vertical frames 84
which extend in the perpendicular direction are attached on the foundation 82.
Moreover, between the continuous footing 81 and the foundation 82, a gap with a
10 predetermined dimension serving as a ventilation hole 86 is formed. In the Example 1,
in the ventilation hole 86, the energy dissipating metal plate 1 described above is
installed.
[0045]
As shown in FIG 5 and FIG 6, first joint parts 46 of the energy dissipating metal
15 plate 1 is fixed to the continuous footing 81 with concrete nails 87 (fasteners).
Moreover, the second joint part 47 is fixed to the foundation 82 with screws 88
(fasteners). As shown in FIG 7, the second joint part 47 is fixed to the foundation 82 by
screwing the screws 88, which are inserted into the screw holes 49 (fastener insertion
holes) with a major axis thereof being along the substantially orthogonal direction B, into
20 a lower face of the foundation 82.
[0046]
That is to say, in the Example 1, the target member 42 to be joined with the joint
parts 46 serves as the continuous footing 81, and the target member 43 to be joined with
the second joint part 47 serves as the foundation 82.
25 [0047]
21
As shown in FIG. 7, in the case where the building structure 5 vibrates along the
direction of the relative displacement A, it is possible to exhibit the damage control effect
described above. That is to say, in the case where load caused by a small to moderate
earthquake or wind is loaded on the building structure 5, the energy dissipating metal
5 plate I can function as a highly rigid joint metal member. Asa result, without
plastically deforming the energy dissipating metal plate 1, it is possible to exhibit
resistive force within a range of the elastic deformation range thereof. Moreover, if a
large earthquake occurs, the damping parts 48 (vibration dissipating parts) receive a
cyclic load of tensile stress and compression stress as described above and are
10 plasticized, and thereby, it is possible to exhibit the damping effect.
[0048]
In contrast, if vibration occurs along the substantially orthogonal direction B, the
energy dissipating metal plate 1 does not exhibit the damping effect described above.
The reason for this is that since it is screwed on the foundation 82 with the screws 88
15 being inserted into the screw holes (long holes) 49 having a major axis being along the
substantially orthogonal direction B, the screws 88 simply reciprocate within the screw
holes 49 along the major axis direction thereof as a result of vibration in the substantially
orthogonal direction B, and no particular deformation suppression function is exhibited.
As a result, if the vibration along the substantially orthogonal direction B occurs, the
20 foundation 82 also vibrates together along the substantially orthogonal direction B on the
energy dissipating metal plate 1.
[0049]
Meanwhile, as shown in the modified example of FIG 8, screw holes 91 with
the major axis thereof being along the substantially orthogonal direction B may be bored
25 on the first joint parts 46 sides, while normal circular screw holes 92 may be bored on the
22
second joint part 47. Also with the configuration, it is possible to obtain an effect
similar to that of the configuration described above. Furthermore, although it is not
shown in the figure, the screw holes of first joint parts 46 and the screw holes of the
second joint parts 47 may both be provided as screw holes with the major axis thereof
being along the substantially orthogonal direction B. Also in the case, it is possible to
obtain an effect similar to that of the configuration described above.
[0050]
Moreover, in the Example 1, the energy dissipating metal plate 1 may serve also
as a spacer in the ventilation hole 86.
10 [Example 2]
[0051]
FIG. 9A and FIG 9B are figures showing Example 2 of the present invention,
showing an example of a building structure 4 in which an energy dissipating metal plate
101 applied with the present invention is arranged. To describe it in more detail, the
15 figure shows an enlarged view of a vertical sectional configuration in the building
structure 4 spanning from a lower level 2 to an upper level 3.
[0052]
In the building structure 4, on the lower level 2 side, there are provided a lower
level horizontal frame 11 that extends in the horizontal direction, and a lower level
20 vertical frame 12 that extends along the perpendicular direction. The lower level
horizontal frame 11 and the lower level vertical frame 12 are joined with each other via a
floor joist 14 or the like arranged therebetween. Moreover, on an upper face of the
lower level horizontal frame 11, the floor joist 14 of the upper level 3 is joined, and
further, on an upper face of the floor joist 14, a floor plate 15 of the upper level 3 is
25 attached.
23
Furthermore, in the building structure 4, on the upper level 3 side, there are
provided an upper level horizontal frame 16 that extends in the horizontal direction and
an upper level vertical frame 17 that extends in the perpendicular direction, and the upper
level horizontal frame 16 and the upper level vertical frame 17 are joined with each other.
5 [0053]
In the building structure 4 having the above configuration, an energy dissipating
metal plate 101 applied with the present invention is used. The energy dissipating metal
plate 101 is such that, above and below the center position of a metal plate 141 P in the
direction of the relative displacement A, second joint parts 147 for joining to the upper
10 level vertical frame 17 and the lower level vertical frame 12 are allocated.
[0054]
The structure of the energy dissipating metal plate 101 of the Example 2 is
described. The energy dissipating metal plate 101 is a single steel plate with a
configuration such that a first energy dissipating member 101 A that joins the upper level
15 vertical frame 17 and the floor joist 14 and a second energy dissipating member 101B
that joins the floor joist 14 and the lower level vertical frame 12 are integrally connected
at a connection part 101a. Meanwhile, reference symbols 176 denote a pair of
reinforcement members.
[0055]
20 The first energy dissipating member lOlA joins the upper level vertical frame 17
and the floor joist 14 and exhibits energy dissipating performance corresponding to the
relative displacement along the perpendicular direction between the upper level vertical
frame 17 and the floor joist 14. The first energy dissipating member 10 lA is provided
with: a second joint part 147 joined with the upper level vertical frame 17; a first joint
25 part 146 joined with the floor joist 14; and damping parts 148 (vibration dissipating
24
parts) which are provided on a transmission path of tensile force and compression force
between the first joint part 146 and the second joint part 147, and which have a plurality
of slits 165 formed therein. Each of the first joint part 146 and the second joint part 147
is a strip form substantially parallel with the direction of the relative displacement A.
5 A pair of the damping parts 148 is arranged adjacent to both sides of the second
joint part 147. A pair of extension parts 150 that extend along the direction of the
relative displacement A at both outer sides of the damping parts 148 are further provided.
Furthermore, the first joint part 146 is provided along the direction of the relative
displacement A so as to continue to both end parts of the extension parts 150.
10 Meanwhile, the transmission path in the Example 2 is a path that connects the second
joint parts 147, the damping parts 148, the extension parts 150, and the first joint part
146.
[0056]
The second joint part 147 is joined to the upper level vertical frame 17 by fixing
15 fasteners (fastening members such as bolts, drill screws, screws, and nails) inserted into a
plurality of fastener insertion holes formed in the second joint part 147 on the upper level
vertical frame 17.
Moreover, the first joint part 146 is joined to the floor joist 14 by fixing fasteners
(fastening members such as bolts, drill screws, screws, and nails) inserted into a plurality
20 of fastener insertion holes formed in the first joint part 146 on the floor joist 14.
[0057]
The second energy dissipating member 101B joins the floor joist 14 and the
lower level vertical frame 12 to exhibit energy dissipating performance corresponding to
the relative displacement along the perpendicular direction between the floor joist 14 and
25 the lower level vertical frame 12. Meanwhile, the same constituents as those of the first
25
energy dissipating member 101A are given the same reference symbols, for the following
description.
The second energy dissipating member 101E is provided with: a second joint
part 147 joined to the lower level vertical frame 12; a first joint part 146 joined to the
5 floor joist 14; and damping parts 148 which are provided on a transmission path of
tensile force and compression force between the first joint part 146 and the second joint
part 147, and which have a plurality of slits 165 formed therein.
[0058]
The second joint part 147 is joined to the lower level vertical frame 12 by fixing
10 fasteners (fastening members such as bolts, drill screws, screws , and nails) inserted into a
plurality of fastener insertion holes formed in the second joint part 147 on the lower level
vertical frame 12.
The configurations of the second energy dissipating member 101B other than
those described above are the same as those of the first energy dissipating member 101A,
15 and therefore, the overlapping descriptions thereof are omitted.
[0059]
In the Example 2, the upper level vertical frame 17 and the lower level vertical
frame 12 correspond to the target member 43 , and the floor joist 14 corresponds to the
target member 42.
20 [0060]
As shown in FIG 9A, in the case where the building structure 4 vibrates along
the direction of the relative displacement A, it is possible to obtain an operational
advantage similar to that of the energy dissipating metal plate 1.
That is to say, in the case where load caused by a small to moderate earthquake
25 or wind is loaded on the building structure 4, the energy dissipating metal plate 101 can
26
function as a highly rigid joint metal member. Asa result, without plastically
deforming the energy dissipating metal plate 101, it is possible to exhibit resistive force
within a range of the elastic deformation range thereof. Moreover, if a large earthquake
occurs, the damping parts 148 in four locations receive a cyclic load of tensile stress and
5 compression stress and are plasticized, and thereby, it is possible to exhibit the damping
effect.
[0061]
A modified example of the Example 2 is shown in FIG. I OA. Meanwhile, in
the following description, points that differ from the configurations described with FIG
10 9A are primarily described, and the rest of the configurations are treated as the same as
those of FIG. 9A, therefore omitting overlapping descriptions.
In the first energy dissipating member 101A of the modified example, the
second joint part 147 is arranged not between the damping parts 148 but on both outer
sides of the respective damping parts 148. That is to say, no fastener insertion holes are
15 formed between the respective damping parts 148, and instead, on both outer sides of the
respective damping parts 148, there are formed a plurality of fastener insertion holes 140
in a strip form along the direction of the relative displacement A. By attaching the
fasteners inserted in the fastener insertion holes 140 to the upper level vertical frame 17,
the first energy dissipating member 101A is joined to the upper level vertical frame 17.
20 Moreover, the second energy dissipating member 101B also has a configuration
similar to that of the first energy dissipating member 101A of the modified example.
The transmission path in the modified example in the above description is a path
that connects the joint parts 147, the damping parts 148, and the first joint part 146, and it
is possible to obtain an operational advantage similar to that of Example 2. In addition,
25 in the case where the floor joist 14, which serves as the target member 43, is displaced
27
along the direction of the relative displacement A, the stress based on the displacement
can be directly transmitted to the region 147a between the damping parts 148.
[0062]
Meanwhile, as shown in FIG. 1013, a reinforcement member 175 composed of a
5 steel bar such as a rib may be further provided so as to be arranged through both of the
region 147a between the damping parts 148 in the first energy dissipating member 101A
and the region 147a between the damping parts 148 in the second energy dissipating
member 101 B, to thereby provide reinforcement. As a result, in the case where a small
to moderate earthquake occurs or where load caused by wind is received, the energy
10 dissipating metal plate 101 can function as a highly rigid strip metal material. As a
result, without plastically deforming the energy dissipating metal plate 101, it is possible
to improve resistive force within a range of the elastic deformation range thereof.
Moreover, if a large earthquake occurs, the damping parts 148 are plasticized with
respect to the cyclic load of tensile stress and compression stress as described above, and
15 thereby, it is possible to exhibit the energy dissipating effect.
[Example 3]
[0063]
FIG 11 shows an example of a building structure 7 in which an energy
dissipating metal plate 301 applied with the present invention is arranged, and more
20 specifically, it shows an enlarged view of the vicinity of a beam 201 of the foundation of
the building structure 7.
[0064]
On the foundation side of the building structure 7, there are provided a beam 201
and a horizontal frame 202 that extend in the horizontal direction, and the beam 201 and
25 the horizontal frame 202 are joined with each other. Moreover, there is further provided
28
a vertical frame 203 that extends in the perpendicular direction from the horizontal frame
202 toward the upper level. The beam 201 and the vertical frame 203 are joined with
each other via the energy dissipating metal plate 301.
[0065]
5 The structure of the energy dissipating metal plate 301 of the Example 3 is
described. The energy dissipating metal plate 301 joins the beam 201 and the vertical
frame 203, to exhibit energy dissipating performance corresponding to the relative
displacement along the perpendicular direction between the beam 201 and the vertical
frame 203. The energy dissipating metal plate 301 is provided with: a second joint part
10 347 joined to the beam 201; a first joint part 346 joined with the vertical frame 203; and
two lines of damping parts 348 (vibration dissipating parts ) which are provided on a
transmission path of tensile force and compression force between the first joint part 346
and the second joint part 347, and which have a plurality of slits 365 formed therein.
Each of the first joint part 346 and the second joint part 347 is a strip form substantially
15 parallel with the direction of the relative displacement A.
[0066]
A pair of the damping parts 348 is arranged adjacent to both sides of the second
joint part 347. A pair of extension parts 350 that extend along the direction of the
relative displacement A at both outer sides of the damping parts 348 is further provided.
20 Furthermore, the first joint part 346 is provided along the direction of the relative
displacement Aso as to continue to end parts of the extension parts 350. Meanwhile,
the transmission path is a path that connects the second joint part 347, the damping parts
348, the extension parts 350, and the first joint part 346.
[0067]
25 The second joint part 347 is joined with the beam 201 by fixing fasteners
29
(fastening members such as bolts, drill screws, screws, and nails) inserted into a plurality
of fastener insertion holes 312 formed in the second joint part 347 on the beam 201. On
the other hand, the first joint part 346 is joined with the vertical frame 203 by fixing the
fasteners, which are inserted in the plurality of fastener insertion holes 311 formed in the
first joint part 346, onto the vertical frame 203.
[0068]
Meanwhile, in the Example 3, the target member 42 with respect to the energy
dissipating metal plate 301 corresponds to the vertical frame 203, and the target member
43 corresponds to the beam 201 of the foundation.
10 As shown in FIG. 11, at the location where the energy dissipating metal plate
301 is arranged in the building structure 7, if perpendicularly upward tensile load from
the vertical frame 203 is loaded in the first joint part 346, stress ap is loaded with respect
to the first joint part 346. Asa result, stress axis loaded to both of the outer sides of
damping parts 348 in which the plurality of slits 365 are formed. Accordingly, shear
15 stress occurs between the stress ax and stress oQ loaded on the second joint part 347, and
as a result, bending moment based on the shear deformation is loaded on damping parts
348. When the bending moment becomes greater than a predetermined value, the
energy dissipating metal plate 301 flexurally yields.
[Example 4]
20 [0069]
FIG 12A and FIG 12B show an example of a steel pipe pillar 100 in which
energy dissipating metal plates 401 applied with the present invention are arranged.
The steel pipe pillar 100 is configured such that a pair of steel pipes 101P having a square
shape in section and a predetermined plate thickness is connected with each other with
25 four of the energy dissipating metal plates 401. That is to say, a single energy
30
dissipating metal plate 401 is provided on each of the four side faces of steel pipes 101P,
and thereby the end parts of the steel pipes 101P are joined with each other.
[0070]
The structure of the energy dissipating metal plate 401 of the Example 4 is
5 described. The energy dissipating metal plate 401 is a single steel plate in which a first
energy dissipating member 401A to be attached to one of the steel pipes 101P and a
second energy dissipating member 401E to be attached to the other steel pipe 10 1 P are
integrally connected. Meanwhile, reference symbol 476 denotes a pair of strip-form
reinforcement members (steel bars such as ribs).
10 [0071]
The first energy dissipating member 401A is provided with: a first joint part 447
joined with the one steel pipe 101P; a pair of damping parts 448 (vibration dissipating
parts) which are arranged on both sides of the first joint part 447 and which have a
plurality of slits 465 formed therein; and extension parts 450 which extend from both of
15 the outer sides of the damping parts 448 along the direction of the relative displacement
A.
The second energy dissipating member 401B is provided with: a second joint
part 447a joined with the other steel pipe 101P; a pair of damping parts 448a (vibration
dissipating parts) which are arranged on both sides of the second joint part 447a and
20 which have a plurality of slits 465a formed therein; and extension parts 450a which
extend from both of the outer sides of the damping parts 448a along the direction of the
relative displacement A.
[0072]
The first energy dissipating member 401 A and second energy dissipating
25 member 401B form a single steel plate with their extension parts 450 being butted with
31
each other. Meanwhile, the transmission path in the Example 4 is a path that connects
the first joint part 447, the damping parts 448, the extension parts 450, the extension parts
450a, the damping parts 448a, and the second joint part 447a. Meanwhile, each of the
first joint part 447 and the second joint part 447a is a strip form substantially parallel
5 with the direction of the relative displacement A.
[0073]
The first joint part 447 is joined to the one steel pipe 101P by fixing fasteners
(fastening members such as bolts, drill screws, and screws) inserted into a plurality of
fastener insertion holes 487 formed in the first joint part 447 on the one steel pipe 101 P.
10 Moreover, the second joint part 447a is joined with the other steel pipe 101 P by
fixing fasteners inserted into a plurality of fastener insertion holes 487a formed in the
second joint part 447a on the other steel pipe 101P.
[0074]
As a result, as shown in FIG 12A and FIG 12B, in the case where the steel pipes
15 101P vibrate along the direction of the relative displacement A, it is possible to exhibit
the damage control effect.
That is to say, in the case where load caused by a small to moderate earthquake
or wind is loaded on the steel pipe pillar 100, the four energy dissipating metal plates 401
can function as highly rigid joint metal members. Asa result, without plastically
20 deforming the energy dissipating metal plates 401, it is possible to exhibit resistive force
within a range of the elastic deformation range thereof. Moreover, if a large earthquake
occurs, the damping parts 448 and 448a receive a cyclic load of tensile stress and
compression stress and are plasticized, and thereby, it is possible to exhibit the damping
effect.
25 [0075]
32
In the Example 4, since the energy dissipating metal plate 401 is provided on
each face of the steel pipe 101 P, the energy dissipating metal plate 401 exhibits the
operational advantage described above with respect to vibrations of all directions that
may occur to the steel pipe 101P, and it contributes to suppress vibration energy.
5 However, the energy dissipating metal plate 401 may be attached only on some side faces
rather than providing it on all of the four side faces of the steel pipe 101P. Moreover, in
the Example 4, although an example of the case where the extension parts 450 are
reinforced by the reinforcement members 476, the reinforcement members 476 may be
omitted.
10 [Example 5]
[0076]
FIG. 12C shows an example in which two energy dissipating metal plates 401
described in Example 4 above are used for joining a pair of beams 561. The beams 561
are of a square shape in section or H shape in section and have a predetermined plate
15 thickness, and interspace between a pair of beams 561 being adjacent to each other is
connected.
[0077]
The energy dissipating metal plates 401 are such that the first joint part 447
thereof is fixed on one of the beams 561 by fasteners (fastening members such as bolts,
20 drill screws, and screws) while the second joint part 447a thereof is fixed on the other
beam 561 by fasteners, to thereby connect the pair of beams 561.
[0078]
As a result, in the case where the beams 561 vibrate along the direction of the
relative displacement A as shown in FIG 12C, it is possible to exhibit a damage control
25 effect similar to that of Example 4.
33
[0079]
In the Example 5, the energy dissipating metal plate 401 is provided on each of
the upper and lower faces of the beams 561. Asa result, the energy dissipating metal
plate 401 exhibits the above operational advantage with respect to vibration of
5 upwardly/downwardly bending directions that occur to the beams 561, to thereby
contribute to suppress vibration energy. However, it is not limited to the configuration
of providing the energy dissipating metal plate 401 on both of the upper and lower faces
of the beams 561, and it may be attached only on one of the faces. Moreover, in the
Example 5, although an example of the case where the extension parts 450 are reinforced
10 by the reinforcement members 476, the reinforcement members 476 may be omitted.
[Example 6]
[0080]
FIG 13 to FIG. 14B show an energy dissipating fuse 610 that uses the energy
dissipating metal plates 301 of Example 3 described using FIG 11.
15 [0081]
The energy dissipating fuse 610 is arranged in an X shape along the diagonal
lines of a square section formed with a pair of steel pipe pillars 622 and a pair of beams
623. At each intersection of each steel pipe pillar 622 and each beam 623, there is
provided a joint member 625. The joint members 625 are respectively fixed strongly by
20 means of welding or bolt joining.
[0082]
One end of the energy dissipating fuse 610 is attached to any one of the joint
members 625, and the other end is attached to a brace 631 of another energy dissipating
fuse 610. FIG 14A shows an attachment to the joint member 625 on one end side of the
25 energy dissipating fuse 610. FIG 14B shows joining of the energy dissipating metal
34
plate 301 between the braces 631 adjacent to each other.
[0083]
The energy dissipating fuse 610 is configured with a brace 631 and energy
dissipating metal plates 301. That is to say, a single unit of the energy dissipating fuse
5 610 is configured with the brace 631 and the energy dissipating metal plates 301
connected to both ends thereof. In the mode shown in FIG 14A, the first joint part 346
of the energy dissipating metal plate 301 is attached to the joint member 625, and the
second joint part 347 is attached to the brace 631. In the case where vibration occurs
along the direction of the relative displacement A, vibration energy dissipating is realized
10 based on the mechanism described above.
[0084]
On the other hand, in the joining locations between the braces 631, as shown in
FIG 14B, the second joint part 347 of the energy dissipating metal plate 301 is joined
with one brace 631, and the first joint part 346 of the energy dissipating metal plate 301
15 is joined with the other brace 631. In the case where vibration occurs along the
direction of the relative displacement A, vibration energy dissipating is realized based on
the mechanism described above.
INDUSTRIAL APPLICABILITY
20 [0085]
According to the present invention, it is possible to provide an energy
dissipating metal plate which, in particular, can be arranged in an extremely narrow gap
and which can be applied to various locations of a building structure, and a building
structure which uses the energy dissipating metal plate.
25 [Reference Signs List]
35
[0086]
1, 101, 301, 401: Energy dissipating metal plate
4, 5, 7: Building structure
12: Lower level vertical frame (target member, wall frame)
5 14: Floor joist (target member)
17: Upper level vertical frame (target member, wall frame)
42, 43: Target member
46, 146, 346, 447: First joint part
46h: First insertion hole
10 47, 147, 347, 447a: Second joint part
48,148,348,448: Damping part (vibration dissipating part)
49: Second insertion hole
65, 65a, 65b, 165, 365, 465: Slit
81: Continuous footing (target member)
15 82: Foundation (target member)
87: First fastener
88: Second fastener
101P: Steel pipe (target member)
150, 350: Extension part
20 175, 176: Reinforcement member
201: Beam (target member, beam material)
203: Vertical frame (target member, wall frame)
561: Beam (target member)
625: Joint member (target member)
25 631: Brace (target member)
36
37
CLAIMS
1. A energy dissipating metal plate which joins a pair of target members and which
exhibits energy dissipating performance corresponding to a relative displacement
5 between the target members, the energy dissipating metal plate comprising:
a first joint part to be joined to one of the target members;
a second joint part to be joined to, other of the target members; and
vibration dissipating parts which are provided on a transmission path of a tensile
force and a compression force between the first joint part and the second joint part and
10 which have slits,
wherein
each of the first joint part and the second joint part is formed in a strip shape
substantially parallel to a direction of the relative displacement.
15 2. The energy dissipating metal plate according to claim 1, wherein the energy
dissipating metal plate is a single plate to be located between the target members so that a
front surface comes in contact with the one of the target members while a back surface
comes in contact with the other of the target members.
20 3. The energy dissipating metal plate according to claim 1, wherein the first joint
part is provided in a form of two lines via the vibration dissipating part, in substantially
axisymmetric positions centered on the second joint part.
4. The energy dissipating metal plate according to claim 3 , wherein: when seen
25 along the direction of the relative displacement, a length of the first joint part is longer
38
than a length of the second joint part; and
end parts of the first joint part in the form of the two lines are joined.
5. The Energy dissipating metal plate according to claim 1, wherein the energy
5 dissipating metal plate is precipitation-hardened or trip-processed so that a ratio of a yield
proof stress to a maximum proof stress is equal to or more than 4/5.
6. The energy dissipating metal plate according to claim 1, wherein at least one of
the first joint part and the second joint part is reinforced along the direction of the relative
10 displacement by a reinforcement member.
7. The energy dissipating metal plate according to claim 1, wherein:
a first insertion hole into which a first fastener that joins the first joint part to the
one of the target members is inserted is formed in the first joint part, while a second
15 insertion hole into which a second fastener that joins the second joint part to the other of
the target members is inserted is formed in the second joint part; and
at least one of the first insertion hole and the second insertion hole is a long hole
which extends in a direction substantially orthogonal to the direction of the relative
displacement.
20
8. The energy dissipating metal plate according to claim 1, wherein:
a pair of the vibration dissipating parts is provided adjacent to both sides of the
second joint part;
a pair of the first joint parts are further provided adjacent to the outer side of the
25 vibration dissipating parts; and
39
the transmission path is a path that connects the first joint part and the second
joint part via the vibration dissipating parts.
9. The energy dissipating metal plate according to claim 1, wherein:
a pair of the vibration dissipating parts is provided adjacent to both sides of the
second joint part;
a pair of extension parts that extend from the outer side of the vibration
dissipating parts along the direction of the relative displacement are further provided;
the first joint part is provided so as to be continuous with the extension parts;
10 and
the transmission path is a path that connects the second joint part, the vibration
dissipating parts, the extension parts, and the first j oint part.
10. A building structure comprising the energy dissipating metal plate according to
15 any one of claim 1 to claim 9.
11. The building structure according to claim 10, further comprising a continuous
footing and a foundation of a building upper frame,
wherein,
20 in a state where the energy dissipating metal plate is located between the
continuous footing and the foundation, the first joint part is joined to either one of the
continuous footing and the foundation, and the second joint part is joined to other of the
continuous footing and the foundation.
25 12. The building structure according to claim 10 , further comprising a wall frame
40
and a beam of a floor,
wherein,
while the second joint part is joined to the wall frame, the first joint part is
joined to the beam.
13. The building structure according to claim 10, further comprising an energy
dissipating fuse which is arranged within a section formed by a plurality of steel pipe
pillars and which has a plurality of braces,
wherein,
10 the energy dissipating metal plate is provided at least one of a joint location
between the steel pipe pillars and the braces and a joint location between the braces.