JP6448968B2 - Shear damper - Google Patents

Description

  The present invention relates to a shear damper provided between two members that relatively move due to the vibration of a building frame.

  As the above-mentioned shear damper, there is a type in which a rigidity is reduced by inserting a slit in a steel plate to reduce the rigidity when the building is subjected to a horizontal load due to an earthquake (for example, Patent Document 1). ). However, when the slit is simply inserted, if the rigidity-decreasing portion is deformed to some extent, the horizontal load increases, so-called hardening, and a load is applied to the peripheral frame.

  In order to solve the above problem, an energy absorber between the slits having a "<" shape is proposed to improve the deformation performance as a shear damper (Patent Document 2). In addition, the energy absorber has a shape of "<", and the cross-sectional areas of the root portion and the central portion of the energy absorber are made different so that the deformation performance is further improved (Patent Literature). 3).

Japanese Utility Model Publication No. 7-34162 Japanese Patent Laid-Open No. 10-121772 JP 2010-116973 A

  In the shear dampers of Patent Documents 2 and 3, since the bending directions of the plurality of energy absorbers are all the same, the deformation characteristics may vary depending on the direction of the shearing force. Further, when a load in the out-of-plane direction is generated in combination, the energy absorber is deformed in the out-of-plane direction, and it is considered that the original performance cannot be exhibited. Furthermore, it is considered that cracks due to bending occur at the base of the energy absorber during deformation, and the load is reduced.

  An object of the present invention is to provide a shear damper that is stably deformed in any direction with respect to a shearing force caused by vibration and is hardly deformed in an out-of-plane direction.

The shear damper of the present invention is provided between two members that move relative to each other due to the vibration of the building frame, a pair of frame joints that are respectively joined to the two members and facing each other, and both ends of the pair of frame joints have both ends. Each of the plurality of energy absorbers is formed in a bow shape with a constricted central portion of the bend, and the direction of the relative movement so that the protruding sides of the bends face each other. e Bei the energy absorbing portions arranged in a symmetrical arrangement, and said relative movement a pair of ribs whose both ends are respectively fixed to the pair of skeleton joints outside position in the direction of the energy absorbing portions,
One of the pair of housing joints is a brace joint to which a compression brace is joined,
Each rib extends from an outer position of the energy absorbing portion to an outer position in the relative movement direction at the brace joint portion.

  According to this configuration, when relative movement occurs between the two members provided with the shear damper, each energy absorber of the energy absorbing portion is deformed to absorb energy. Since each energy absorber is bent in an arc shape and the center portion of the bend is constricted, the energy absorber is reliably deformed to the side where the bend becomes larger at the center portion of the bend. Since the energy absorbers are arranged in a symmetrical arrangement in the direction of relative movement so that the protruding sides of the bends face each other, the same deformation occurs when the two members move relative to either the forward or reverse direction. Energy absorption capability is obtained. In addition, since the ribs having both ends fixed to the pair of housing joint portions are provided, the energy absorbing portion is deformed in an out-of-plane direction that is a direction orthogonal to the surface on which the housing joint portions are disposed. Can be prevented. Since the rib is at the outer position in the relative movement direction of the energy absorbing portion, each of the energy absorbers described above does not become an obstacle to deformation that absorbs the shearing force.

In the present invention, a brace joint portion that is one of the pair of housing joint portions is joined to a compression brace that is a brace capable of bearing a compressive force, and a tip of the rib on the brace joint side is provided. The position may be on the same distance as or far from the position of the joint between the brace joint and the compression brace as seen from the other of the pair of housing joints.
When the rib is provided as described above, even if an out-of-plane force is applied from the compression brace to the brace joint, the force can be received by the rib. Can be more reliably prevented.

In this invention, the said energy absorption part may be flat plate shape, may be located in parallel with two sheets, and the said rib may be provided ranging over these two said energy absorption parts on both sides of the said energy absorption part.
Thereby, absorption of shear energy by the energy absorber and prevention of deformation of the energy absorber in the out-of-plane direction by the rib are further ensured.

In the case of the above-described configuration, the brace joint portion that is one of the pair of housing joint portions is joined to the compression brace that is a brace capable of bearing a compressive force, and the pillar that is the other housing joint portion. -The horizontal member joint is joined to a column or horizontal member of the building frame, and the energy absorbing part and the brace joint, and a part of the pillar / horizontal joint part are the same plate-like plate material The column / horizontal material joint portion includes a plate-like member that is perpendicular to the plate material and is joined to the pillar or horizontal material, and the two plate materials are formed from the plate-like member. It is preferable that the two ribs stand up.
Thereby, the function that an energy absorption part deform | transforms effectively is acquired, ensuring required intensity | strength.

The plate-like member may extend on both sides in the relative movement direction relative to the ribs, and may be provided with reinforcing ridges extending along the extending direction on the surface where the ribs rise in a portion extending on both sides of the ribs. Good.
By extending the plate member to both sides of the rib, the plate member can be firmly joined to the column or the horizontal member. Moreover, the intensity | strength of a plate-shaped member can be improved by providing a protruding item | line.

The shear damper of the present invention is provided between two members that move relative to each other due to the vibration of the building frame, a pair of frame joints that are respectively joined to the two members and facing each other, and both ends of the pair of frame joints have both ends. Each of the plurality of energy absorbers is formed in a bow shape with a constricted central portion of the bend, and the direction of the relative movement so that the protruding sides of the bends face each other. energy absorbing portions arranged in a symmetrical arrangement and, e Bei and said relative movement a pair of ribs whose both ends are respectively fixed to the pair of skeleton joints outside position in the direction of the energy absorbing portion, the pair of skeleton joints One of the housing joints is a brace joint to which a compression brace is joined, and each of the ribs extends from the outer position of the energy absorbing part. Since it extends to the direction of the outside position of the relative movement in the engagement section, be stably deformed in any direction with respect to the shearing force by vibration, and hardly deform in an out-of-plane direction.

It is a front view of the building frame provided with the shear damper concerning one Embodiment of this invention. It is a front view of a different building frame provided with the same shear damper. FIG. 3 is an exploded view of the compression brace of the building frame shown in FIG. 1 or FIG. 2. (A) is the front view of the connection member of the same building frame, and its peripheral part, (B) The side view. (A) is the front view of a shear damper, (B) is the VB-VB sectional drawing, (C) is the side view. FIG. 6 is an enlarged view of a VI part in FIG. It is explanatory drawing which shows the mode of a deformation | transformation of the energy absorber of a shear damper, and a rib. It is a graph which shows the relationship between each deformation amount and load of an energy absorber and a rib. It is a graph which shows the relationship between the deformation of a shear damper, and a load. It is explanatory drawing of the force which acts on a building frame. It is explanatory drawing of the force which acts on the connection part of a building frame, and the junction part of a pillar. It is a front view of a different example of a building frame provided with a shear damper.

An embodiment of the present invention will be described with reference to the drawings.
1 and 2 show a part of a building frame provided with a shear damper according to the present invention. The building is a wooden building, and includes a rectangular wooden frame 1 having a vibration control structure. The shear damper 7 is provided between the two members that move relative to each other due to vibration in the wooden shaft assembly 1.

  The wooden shaft assembly 1 includes two adjacent pillars 2 and upper and lower horizontal members 3 and 4 provided between the pillars 2. For example, the upper horizontal member 3 is a beam, and the lower horizontal member 4 is a beam or a base. The pillar 2 and the horizontal members 3 and 4 are shaft members constituting the wooden shaft assembly 1. In this embodiment, the pillar 2 is the longer shaft member and the horizontal members 3 and 4 are shorter. It is a shaft material. The length of the shaft material referred to here refers to the length of the portion constituting the wooden shaft assembly 1. Specifically, the length of the column 2 is the length H between the upper and lower horizontal members 3 and 4, and the length of the horizontal members 3 and 4 is the length W between two adjacent columns 2. is there.

  This wooden shaft assembly 1 includes four compression braces 5 whose both ends are connected between intermediate positions in the longitudinal direction of adjacent vertical and horizontal shaft members. Specifically, the four compression braces 5 are provided between the upper and lower intermediate positions of the left column 2 and the upper and lower horizontal members 3 and between the upper and lower intermediate positions of the left column 2 and the lower horizontal member 4. Between the right and left intermediate positions, between the upper and lower intermediate positions of the right column 2 and the left and right intermediate positions of the upper horizontal member 3, and between the upper and lower intermediate positions of the right column 2 and the lower horizontal member 4 Each is arranged. That is, these four compression braces 5 form a rhombus shape.

  The ends of the two left and right compression braces 5 that are connected to the column 2 are connected to a connecting member 6 joined to the column 2 and are not directly connected to the column 2. Since the connecting member 6 has a certain vertical length, and the ends of the compression braces 5 are connected to the upper and lower ends thereof, the arrangement of the four compression braces 5 is not a rhombus in a strict sense, but a rough rhombus shape. It is. In addition, the end portions of the two upper and lower compression braces 5 on the side connected to the horizontal members 3 and 4 are connected to the horizontal members 3 and 4 via the shear damper 7, respectively. The shear damper 7 absorbs a shear force generated between the compression brace 5 and the horizontal members 3 and 4. In the case of this embodiment, the horizontal members 3 and 4 and the compression brace 5 are two members that relatively move due to the vibration.

  The compression brace 5 is a brace capable of bearing a compressive force. As shown in FIG. 3, the compression brace 5 includes a brace body 11 mainly made of a pipe material and a pair of joint members 12 connected to both ends of the brace body 11. Become. The brace body 11 has female screw portions 11a at opposite ends, the directions of the thread grooves being opposite to each other. In this example, nuts fixed to both ends of the pipe material portion 11b of the brace body 11 are used as the female screw portion 11a. The joint member 12 includes a male screw portion 12 a that is screwed into the female screw portion 11 a of the brace body 11, and a flat mounting portion 12 b that has a through hole 13 for connecting to the connecting member 6. By adjusting the screwing amount of the male screw portion 12a of the joint member 12 with respect to the female screw portion 11a of the brace body 11, the entire length of the compression brace 5 can be arbitrarily changed. The compression brace 5 has a so-called turnbuckle configuration. The compression brace 5 has sufficient rigidity against the compression force because the brace body 11 is mainly made of a pipe material.

  As shown in FIG. 4, the connecting member 6 is a flat base portion 6 a that is joined to the inner surface of the wooden shaft assembly 1 in the pillar 2, and projects from the base portion 6 a to the inside of the wooden shaft assembly 1. It consists of two flat plate-like protrusions 6b. The base portion 6a is brought into contact with the inner surface of the wooden shaft assembly 1, and a plurality of screws 14 are screwed into the base portion 6a and the column 2 from the inner side of the wooden shaft assembly 1 to join the connecting member 6 to the column 2. To do. A through hole 15 is provided at both upper and lower ends of the protruding portion 6b to connect the compression brace 5. The attachment portion 12b of the joint member 12 of the compression brace 5 is inserted between the upper end portions or the lower end portions of the two protrusion portions 6b, and the through hole 13 (FIG. 3) of the joint member 12 and the through hole 15 of the protrusion portion 6b are inserted. By inserting the connecting pin 16, the end of the compression brace 5 is connected to the connecting member 6. Since the end of the compression brace 5 is sandwiched between the two protrusions 6b, the compression brace 5 is centered.

  As shown in FIG. 5, the shear damper 7 includes a column / horizontal material joint 21 joined to the horizontal members 3, 4, a brace joint 22 joined to the compression brace 5, and these columns / horizontals. It has an energy absorbing portion 23 interposed between the material joining portion 21 and the brace joining portion 22 and a pair of left and right ribs 24 provided at the left and right outer positions in FIG. The column / horizontal material joint portion 21 and the brace joint portion 22 are a pair of “body joint portions” in the claims. In this embodiment, the column / horizontal material joint 21 is joined to the horizontal members 3 and 4, but the column / horizontal material joint 21 may be joined to the column 2 as shown later. .

  The division of the column / horizontal material joint portion 21, the brace joint portion 22, and the energy absorption portion 23 is a division seen from the functional aspect, and actually, the entire brace joint portion 22 and the energy absorption portion 23, and the pillar. A part of the horizontal member joining portion 21 is configured by each portion of the same plate-shaped energy absorbing portion forming plate member 25. Specifically, the energy absorption part 23 is formed by providing the some opening part 26 and the notch part 27 in a steel plate by stamping etc. FIG. The shape of the energy absorber 23 will be described later. Two such energy absorbing portion forming plate members 25 are arranged in parallel to each other. That is, both the column / horizontal material joint portion 21 and the brace joint portion 22 are formed of a part of the two energy absorbing portion forming plate members 25.

  The column / horizontal material joining portion 21 includes a portion 25 a formed of a part of the two energy absorbing portion forming plate members 25, and a plate-like member 28 perpendicular to both the energy absorbing portion forming plate members 25. The two ribs 24 are provided along the left and right end edges of each energy absorbing portion forming plate member 25 across the plate-like member 28 and the brace joint portion 22. In other words, two energy absorbing portion forming plate members 25 and two ribs 24 rise from the plate-like member 28. The plate-like member 28 extends to the left and right outside from the left and right ends of the energy absorbing portion forming plate member 25, and a reinforcing protrusion 29 for reinforcement along the extending direction on the surface where the rib 24 of the portion extending outward from the rib 24 rises. Is provided.

  The column / horizontal member joining portion 21 causes the plate-like member 28 to abut on the inner surface of the wooden shaft assembly 1 in the horizontal members 3, 4, and the plate-like member 28 and the horizontal member from the inside of the wooden shaft assembly 1. A plurality of screws 30 are screwed into the frames 3 and 4 and joined to the horizontal members 3 and 4. The brace joint portion 22 is provided with two through holes 31 for connecting the compression brace 5. The attachment portion 12b of the joint member 12 of the compression brace 5 is inserted between the two energy absorbing portion forming plate members 25, and is connected to the through hole 13 (FIG. 3) of the attachment portion 12b and the through hole 31 of the brace joint portion 22. By inserting the pin 32, the end of the compression brace 5 is connected to the brace joint 22.

  As shown in FIG. 5C, the rib 24 is a rectangular plate made of a steel plate or the like, and the upper and lower ends in the figure are fixed to the column / horizontal material joint 21 and the brace joint 22 by welding or the like, respectively. Has been. The upper end position of the rib 24 is the same as or higher than the position of the through hole 31. In other words, the tip position of the rib 24 on the brace joint portion 22 side is the same distance as or far from the position of the through hole 31 when viewed from the pillar / horizontal material joint portion 21 side. This is to prevent the energy absorbing portion 23 from being deformed in the out-of-plane direction by receiving the force by the rib 24 even if an out-of-plane direction force is applied from the compression brace 5 to the brace joint portion 22. is there.

  The energy absorbing portion 23 is composed of a plurality of energy absorbers 40 whose both ends are respectively connected to the column / horizontal material joint portion 21 and the brace joint portion 22. In other words, one end of each energy absorber 40 continues to the column / horizontal material joint portion 21, and the other end continues to the brace joint portion 22. The plurality of energy absorbers 40 are arranged at equal intervals. Each energy absorber 40 is bent in an arcuate shape and has a shape in which the center of the bend is constricted. In the case of this embodiment, the number of energy absorbers 40 is six for each energy absorbing portion forming plate member 25, and the three energy absorbers 40 on the left and right sides are arranged in a symmetrical arrangement so that the protruding sides of the bends face each other. Yes.

  More specifically, as shown in FIG. 6 which is an enlarged view of the VI part in FIG. 5, the energy absorber 40 has arcuate side edges of the constricted portion 41 which is the central portion of the bend. The straight portions 42 extend obliquely toward the horizontal member joining portion 21 (not shown) and the brace joining portion 22, respectively. The inclination angle θ of the linear portion 42 is 60 °, for example. Both side edges of the straight portion 42 are straight. Further, the straight portion 42 has a shape that increases in width as it approaches the column / horizontal material joint portion 21 and the brace joint portion 22. The ratio of the minimum width a and the maximum width b of the straight line portion 42 is, for example, a: b = 1.5: 2. The side edge of the connecting portion 43 between the straight portion 42 and the column / horizontal material joint portion 21 and the brace joint portion 22 is arcuate. As described above, the side edge of each energy absorber 40 has a smooth shape in which the straight line and the arc are continuously connected.

The operation of the shear damper 7 having the above configuration will be described.
When relative movement in the horizontal direction, which is the longitudinal direction of the horizontal members 3, 4, occurs between the two members provided with the shear damper 7, that is, the horizontal members 3, 4 and the compression brace 5, the energy absorbing portion 23 Each energy absorber 40 is deformed to absorb energy. Since the plurality of energy absorbers 40 are arranged at equal intervals, a force flows evenly to each energy absorber 40.

  Since each energy absorber 40 is bent in an arc shape and is constricted at the center of the bend, the energy absorber 40 is surely deformed to the side where the bend becomes larger at the center of the bend. Since the energy absorber 40 has a smooth shape, the stress burden can be dispersed. Thereby, it is possible to deform to a large deformation region.

  Since the energy absorbers 40 are arranged in a symmetrical arrangement so that the protruding sides of the bends face each other, the same applies when the horizontal members 3 and 4 and the compression brace 5 are moved relative to each other in the forward or reverse direction. To obtain the same energy absorption capability. That is, there is no imbalance between the left and right of the shear damper 4.

  Since the ribs 24 are provided on both sides of the energy absorbing portion 23, even if the energy absorber 40 is damaged, the rib 24 functions as a member that bears a tensile force, thereby preventing a load drop. For example, when the energy absorber 40 is deformed by shearing force as shown in FIG. 7A to FIG. 7B, the boundary between the energy absorber 40 and the column / horizontal material joint portion 21 or the brace joint portion 22 is formed. A crack 45 is generated. Thereby, as shown with the continuous line A in the graph of FIG. 8, the load which the energy absorber 40 bears falls. However, when the rib 24 is pulled (or pushed) and the length of the rib 24 is extended, the load borne by the rib 24 linearly increases as indicated by the dotted line B in the graph of FIG. Since the load decrease of the energy absorber 40 and the load increase of the rib 24 are offset, the load borne as a whole is hardly changed. Since the notch portions 27 are provided at both ends of the energy absorbing portion 23, the energy absorbing portion 40 does not interfere even if the rib 24 is deformed.

  FIG. 9 is a graph showing a loading test result of an example of the shear damper 7. From this test result, it can be seen that even if the deformation increases, the load applied as a whole hardly changes. In addition, it can be seen that the same behavior occurs with respect to the load in either the forward or reverse direction. By changing the number of energy absorbers 40, the thickness, the inclination angle θ, the ratio between the minimum width a and the maximum width b of the linear portion 42, the deformation amount / load characteristics can be arbitrarily changed.

  Further, the pair of ribs 24 provided on both sides of the energy absorbing portion 23 receives the rotational force entering the shear damper 7, thereby preventing the energy absorber 40 from being deformed in the out-of-plane direction. Since the ribs 24 are located at the left and right outer positions of the energy absorbing portion 23, each energy absorber 40 does not become an obstacle to deformation that absorbs the shearing force.

  Since each part of the shear damper 7 is made of a steel plate, it is easy to process and can be manufactured at low cost. Also, no special material is required. Even if each portion is made of a steel plate, the energy absorbing portion 23 is secured while securing the necessary strength by assembling the two energy absorbing portion forming plate members 25 and the two ribs 24 from the plate-like member 28. The function that each energy absorber 40 of this deform | transforms effectively can be acquired. Further, since the end portion of the compression brace 5 is sandwiched between the two energy absorbing portion forming plate members 25, the compression brace 5 can be easily centered. If strength is required, three or more energy absorbing portion forming plate members 25 may be provided apart from each other or overlap each other.

  The wooden shaft assembly 1 provided with the shear damper 7 adjusts the overall length of the compression brace 5 according to the internal height between the upper and lower horizontal members 3 and 4. FIG. 1 shows a case where the inner legal height is low, and FIG. 2 shows a case where the inner legal height is high. However, the compression brace 5 needs to be used at an appropriate angle for efficiently transmitting the shearing force to the shear damper 7. For example, when the inner height is extremely high, if the length of the compression brace 5 is extended and adjusted, the angle of the compression brace 5 becomes excessive, and the shear force cannot be efficiently transmitted to the shear damper 7. As described above, when it is inappropriate to adjust the length of the compression brace 5, the connecting member 6 having a long vertical length is used to keep the angle of the compression brace 5 within an appropriate angle. Correspond to legal height.

This wooden shaft assembly 1 exhibits the following behavior when subjected to rolling due to an earthquake.
For example, as shown in FIG. 10, when a rightward force F in the figure acts on the building, loads P1, P2, P3, and P4 are applied to the compression braces 5 in the directions indicated by the arrows. By arranging the four compression braces 5 in a diamond shape, the horizontal components in the loads P1, P2 (P3, P4) of the pair of compression braces 5 arranged across the connecting member 6 are opposite to each other. For this reason, the horizontal components of both loads P1, P2 (P3, P4) are canceled out, and no horizontal force is applied to the column 2, and only the axial forces N1, N2 in the vertical direction are applied. As a result, almost no shear force acts on the joint 8 between the column 2 and the horizontal members 3 and 4. The horizontal shearing force applied to the wooden shaft assembly 1 is borne by the upper and lower shear dampers 7. The seismic force is absorbed by the shear damper 7 to obtain a seismic control action.

  When the right side portion of the wooden shaft assembly 1 is viewed, a downward load P is applied to the connecting member 6 as shown in FIG. Since the center of the load P is separated from the joint surface 17 of the column 2 and the connecting member 6 by a distance h, a bending moment M having a magnitude of (h × P) is applied to the joint surface 17. This bending moment M exerts an action of pulling the upper part of the connecting member 6 away from the joint surface 17 when the load P is downward. In the connecting member 6 of this embodiment, the flat base portion 6a is brought into contact with the column 2 and joined to the column 2 by a plurality of screws 14, so that the bending moment M can be applied to the wide surface of the base portion 6a. And sufficient bonding strength can be obtained. Moreover, by making the base part 6a into a flat plate shape, the connecting member 6 can be fixed to the pillar 2 with a large number of screws 14, and the burden of the screws 14 per one can be reduced.

  In the wooden shaft assembly 1, the longer shaft member is the column 2 and the shorter shaft member is the horizontal members 3 and 4, so the connecting member 6 is attached to the joint between the column 2 and the compression brace 5. A shear damper 7 is interposed at the joint between the upper and lower horizontal members 3 and 4 and the compression brace 5. As shown in FIG. 12, when the longer shaft member is the horizontal members 3 and 4 and the shorter shaft member is the column 2, the upper and lower horizontal members 3 and 4 that are longer shaft members The connecting member 6 may be interposed at the joint between the compression brace 5 and the shear damper 7 may be interposed at the joint between the column 2 that is the shorter shaft member and the compression brace 5.

1 ... Wooden frame (building frame)
2 ... pillars 3 and 4 ... horizontal member 5 ... compression brace 6 ... connecting member 7 ... shear damper 21 ... pillar / horizontal member joint (frame joint)
22 ... Brace joint (body joint)
23 ... Energy absorption part 24 ... Rib 28 ... Plate-like member 29 ... Projection 40 ... Energy absorber

Claims (5)

A shear damper provided between two members that move relative to each other due to the vibration of the building frame,
A pair of housing joints joined to the two members and facing each other;
Each of these energy absorbers has an arcuate shape, each of which is bent in a bow shape, and the center of the bend is constricted, with the bent protruding sides facing each other. An energy absorber arranged in a symmetrical arrangement in the direction of relative movement,
A pair of ribs whose opposite ends are respectively fixed to the pair of housing joints at positions outside the relative movement direction of the energy absorber;
Bei to give a,
One of the pair of housing joints is a brace joint to which a compression brace is joined,
Each rib extends from an outer position of the energy absorbing portion to an outer position in the direction of relative movement in the brace joint portion.
Shear damper.   The shear damper according to claim 1, wherein a brace joint portion that is one of the pair of housing joint portions is joined to a compression brace that is a brace capable of bearing a compressive force, and the rib in the rib The side where the front end position on the brace joint side is the same distance as or far from the position of the joint between the brace joint and the compression brace when viewed from the other of the pair of housing joints Shear damper located in.   3. The shear damper according to claim 1, wherein the energy absorbing portions are flat and are arranged in parallel, and the ribs extend over the two energy absorbing portions on both sides of the energy absorbing portion. Shear damper provided.   4. The shear damper according to claim 3, wherein a brace joint portion, which is one of the pair of housing joint portions, is joined to a compression brace that is a brace capable of bearing a compressive force, and the other housing body. The column / horizontal material joint, which is a joint, is joined to the column or horizontal material of the building frame, and the energy absorber and the brace joint as a whole, and a part of the column / horizontal material joint are Consists of each part of the same flat plate material, the column / horizontal material joint portion has a plate-like member that is perpendicular to the plate material and joined to the column or horizontal material, and from this plate-like member A shear damper in which the two plate members and the two ribs rise. 5. The shear damper according to claim 4, wherein the plate-like member extends to both sides of the relative movement direction relative to the rib, and extends in a direction in which the rib rises in a portion extending to the both sides of the rib. Shear damper with ridges for reinforcement along.

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