Shear force absorbing member and seismic-resistant structure

Abstract

To provide a shear force absorbing member and seismic-resistant structure with high shear force absorption capacity and low cost. [Solution] The shear force absorbing member 1 comprises a plate-shaped absorbing portion 2 bent into a U shape, and a separation prevention portion 3 arranged on the outside of the U shape of the absorbing portion 2. The separation prevention portion 3 has a restraining portion 30 that restrains a pair of flat plate portions 20, 20 so that the distance between one flat plate portion 20 (e.g., flat plate portion 21) extending from one end of the curved portion 29 in the U shape of the absorbing portion 2 and the other flat plate portion 20 (e.g., flat plate portion 22) extending from the other end of the curved portion 29 does not increase. The restraining portion 30 has a pair of restricting portions 51, 52 arranged on the outside in the width direction of the U shape of the absorbing portion 2 between one flat plate portion 20 and the other flat plate portion 20.

Description

Technical Field

[0001] The present invention relates to a shear force absorbing member and a seismic structure.

Background Art

[0002] Patent Document 1 discloses a seismic structure. This seismic structure includes an upper horizontal member, a lower horizontal member, and a pair of energy absorbing members provided between the upper horizontal member and the lower horizontal member. Each of these energy absorbing members has a curved portion, a pair of intermediate portions continuously extending from both ends of the curved portion, and a pair of fixing portions continuously extending from the ends of the pair of intermediate portions, and has a U shape. This energy absorbing member is configured such that relative displacement in the extending direction occurs in the pair of fixing portions in response to relative horizontal displacement between the upper horizontal member and the lower horizontal member. Further, the pair of energy absorbing members are held in a state of being close to each other with the curved portions facing each other by a pair of clamping portions.

[0003] Patent Document 2 discloses a shear force absorbing member and a seismic structure. This shear force absorbing member includes a plate-shaped absorbing portion having a U shape when viewed from the front, and a separation preventing portion disposed inside the U of the absorbing portion. The separation preventing portion locks one flat plate portion extending from one end of the curved portion in the U shape of the absorbing portion to the other flat plate portion extending from the other end of the curved portion so that the distance therebetween does not increase.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] In conventional shear force absorbing members and seismic-resistant structures that use a U-shaped energy absorbing member, as illustrated in the disclosure of Patent Document 1 above, when attempting to absorb the shear force caused by displacement in the seismic-resistant structure with the absorbing member, the distance between the pair of U-shaped flat plates in the absorbing member tends to widen. Therefore, it was sometimes difficult to further enhance the shear force absorbing capacity of the shear force absorbing member.

[0006] The shear force absorbing member disclosed in Patent Document 2 has a high capacity to absorb shear force. However, this shear force absorbing member requires high precision in manufacturing, or its processing tends to be complex, making cost reduction difficult. Therefore, there is a need for a shear force absorbing member and seismic-resistant structure that have high shear force absorption capacity and are low cost.

[0007] This invention has been made in view of the above circumstances, and its purpose is to provide a shear force absorbing member and an earthquake-resistant structure that have a high capacity to absorb shear force and are low cost. [Means for solving the problem]

[0008] The shear force absorbing member according to the present invention, for achieving the above objective, A plate-shaped absorbent section bent into a U-shape, The absorption section comprises a separation prevention section arranged on the outside of the U-shape, The separation prevention portion has a restraining portion that restrains a pair of flat plate portions so that the distance between one flat plate portion extending from one end of the curved portion in the U-shape of the absorption portion and the other flat plate portion extending from the other end of the curved portion does not increase. The restraining portion has a set of restricting portions arranged on the outside in the width direction of the U-shape of the absorbing portion, between one of the flat plate portions and the other flat plate portion.

[0009] In the shear force absorbing member according to the present invention, The restricting portion may overlap with the pair of flat plate portions when viewed along the width direction.

[0010] In the shear force absorbing member according to the present invention, One of the restricting portions is a non-sliding restricting portion that restricts the vertical movement of the U-shaped absorption portion with respect to the outer surface in the width direction of one of the flat plate portions. The other restricting portion may be a sliding restricting portion that is slidable with respect to the outer surface in the width direction of the other flat plate portion.

[0011] In the shear force absorbing member according to the present invention, The non-sliding restricting portion may be fixed to the outer surface in the width direction of one of the flat plate portions.

[0012] In the shear force absorbing member according to the present invention, One of the flat plates has a projection extending along the width direction on its outer surface in the width direction, The projection may restrict the vertical movement of the non-sliding restricting portion in the U-shape of the absorbing portion.

[0013] In the shear force absorbing member according to the present invention, The restraining portion may have a bridging portion that connects a pair of the restricting portions together.

[0014] In the shear force absorbing member according to the present invention, The separation prevention unit is, The restraining portion is located on one side in the depth direction of the U-shape of the absorption portion, The restraining portion may be located on the other side in the depth direction.

[0015] In the shear force absorbing member according to the present invention, The separation prevention portion may have fastening portions that restrain one of the restraining portions and the other restraining portion in the depth direction.

[0016] In the shear force absorbing member according to the present invention, The fastening part may be arranged inside the U-shape of the absorption part and at a position penetrating in the depth direction of the U-shape of the absorption part.

[0017] In the shear force absorption member according to the present invention, The fastening part may be arranged at a position closer to the sliding side regulating part than the non-sliding side regulating part.

[0018] In the shear force absorption member according to the present invention, The absorption part is provided in a pair, The pair of absorption parts may be arranged on the same virtual plane with their tops facing each other and the U-shapes of the absorption parts being the same.

[0019] In the shear force absorption member according to the present invention, The restraining part for restraining the pair of flat plate parts in one of the absorption parts and the restraining part for restraining the pair of flat plate parts in the other absorption part may be integrally formed.

[0020] In the shear force absorption member according to the present invention, The restraining part may have a through hole formed along the depth direction.

[0021] In the shear force absorption member according to the present invention, The absorption part is provided in a pair, The pair of absorption parts may be arranged on the same virtual plane with their tops facing each other and the U-shapes of the absorption parts being the same.

[0022] The seismic structure according to the present invention for achieving the above object is The above shear force absorption member and A pair of structures is provided, One of the flat plate parts of the absorption part of the shear force absorption member is supported by one of the structures, and the other flat plate part is supported by the other structure.

[0023] In the seismic structure according to the present invention, It further includes a plate-shaped support part, The aforementioned support portion is The plate surface is arranged so as to intersect with the flat plate portion and along the direction in which the flat plate portion extends. Supported by the aforementioned structure, The absorbent portion may be supported by the support portion on the outer side of the U-shape of the absorbent portion on the flat plate portion. [Effects of the Invention]

[0024] According to the present invention, it is possible to provide a shear force absorbing member and an earthquake-resistant structure that have a high capacity to absorb shear force and are low cost. [Brief explanation of the drawing]

[0025] [Figure 1] This is a front view of the earthquake-resistant structure of the first embodiment. [Figure 2] This is a side view of the earthquake-resistant structure of the first embodiment. [Figure 3] This is a top view of the earthquake-resistant structure of the first embodiment. [Figure 4] This is a perspective view of the shear force absorbing member of the first embodiment, viewed from diagonally above. [Figure 5] This is a side view of the absorption section. [Figure 6] This is a top view of the shear force absorbing member of the first embodiment. [Figure 7] This diagram illustrates the manner in which shear force is absorbed in earthquake-resistant structures. [Figure 8] This diagram illustrates the manner in which shear force is absorbed by the absorption section. [Figure 9] This diagram illustrates the deformation state of the shear force absorbing member of the first embodiment. [Figure 10] This is a front view of the seismic-resistant structure in Modification 1 of the First Embodiment. [Figure 11] This is a front view of the seismic-resistant structure in a modified example 2 of the first embodiment. [Figure 12] This is a front view of the seismic-resistant structure in Modification 3 of the First Embodiment. [Figure 13] This is a front view of the earthquake-resistant structure of the second embodiment. [Figure 14] This is a front view of the seismic-resistant structure in Modification 1 of the second embodiment. [Figure 15] This is a front view of the seismic-resistant structure in a modified example 2 of the second embodiment. [Figure 16] This is a front view of the seismic-resistant structure in modified example 3 of the second embodiment. [Figure 17] This is a top view of the shear force absorbing member of the third embodiment. [Figure 18] This is a front view of the shear force absorbing member of the third embodiment. [Figure 19] This is a diagram illustrating the deformation state of the shear force absorbing member of the third embodiment. [Figure 20] This is a front view of the shear force absorbing member of the fourth embodiment. [Figure 21] This is a top view of a shear force absorbing member of another embodiment. [Figure 22] This is a front view of a shear force absorbing member of another embodiment. [Figure 23] This figure illustrates the deformation state of a shear force absorbing member in another embodiment. [Figure 24] This is a top view of a shear force absorbing member of another embodiment. [Figure 25] This is a front view of a shear force absorbing member of another embodiment. [Figure 26] This figure illustrates the deformation state of a shear force absorbing member in another embodiment. [Figure 27] This is a top view of a shear force absorbing member of another embodiment. [Figure 28] This is a front view of a shear force absorbing member of another embodiment. [Figure 29] This figure illustrates the deformation state of a shear force absorbing member in another embodiment. [Figure 30] This is a front view of a shear force absorbing member of another embodiment. [Figure 31] This is a front view of a shear force absorbing member of another embodiment. [Modes for carrying out the invention]

[0026] Based on the drawings, a shear force absorbing member and an earthquake-resistant structure according to an embodiment of the present invention will be described.

[0027] (First Embodiment) Figures 1 to 3 show the shear force absorbing member 1 and the seismic-resistant structure 100 equipped with the shear force absorbing member 1 according to this embodiment. Figure 4 shows details of the shear force absorbing member 1. Figures 1, 2, and 3 are the front view, side view, and top view of the seismic-resistant structure 100, respectively.

[0028] As shown in Figure 4, the shear force absorbing member 1 according to this embodiment comprises a plate-shaped absorbing portion 2 bent into a U shape, and a separation prevention portion 3 arranged on the outside of the U shape of the absorbing portion 2. The separation prevention portion 3 has a restraining portion 30 that restrains a pair of flat plate portions 20, 20 so that the distance between one flat plate portion 20 (e.g., flat plate portion 21) extending from one end of the curved portion 29 in the U shape of the absorbing portion 2 and the other flat plate portion 20 (e.g., flat plate portion 22) extending from the other end of the curved portion 29 does not increase. The restraining portion 30 has a pair of restricting portions 51, 52 arranged on the outside in the width direction of the U shape of the absorbing portion 2 between one flat plate portion 20 and the other flat plate portion 20.

[0029] As shown in Figure 1, the seismic-resistant structure 100 according to this embodiment comprises a shear force absorbing member 1 and a pair of vertical frames 8, 8, wherein the absorbing portions 2, 2 of the shear force absorbing member 1 are supported by one vertical frame 8 at one flat plate portion 20 and by the other vertical frame 8 at the other flat plate portion 20.

[0030] The shear force absorbing member 1 and the seismic-resistant structure 100 have a high capacity to absorb shear forces generated between the vertical frames 8, 8 along the extension direction of the vertical frame 8, and are low-cost.

[0031] The shear force absorbing member 1 and the seismic-resistant structure 100 will be described in detail below.

[0032] Seismic-resistant structure 100 can be used, for example, as the structure of a building's walls. The building may consist of a reinforced concrete foundation, a frame structure composed of framing members such as columns and beams, and a superstructure fixed to the foundation, with panels forming walls, floors, etc. The framing members and panels can be pre-standardized. In this case, the framing members and other components can be manufactured in advance at a factory and transported to the construction site for assembly. Seismic-resistant structure 100 may be incorporated as part of a newly constructed building, or it may be added to an existing building.

[0033] The seismic-resistant structure 100 is a rectangular frame comprising a pair of vertical frames 8,8, another pair of horizontal frames 9,9, and a shear force absorbing member 1. In buildings, the seismic-resistant structure 100 can be used to construct so-called load-bearing walls.

[0034] The vertical frames 8,8 are, for example, column sections 81, 82 whose extension direction is aligned vertically (same as the vertical direction). Column sections 81 and 82 are arranged parallel to each other.

[0035] The horizontal frames 9,9 are, for example, an upper beam 91 and a lower beam 92 whose extension direction is arranged along the horizontal direction. The upper beam 91 and the lower beam 92 are arranged parallel to each other.

[0036] The column sections 81 and 82, the upper beam 91, and the lower beam 92 form a rectangular frame structure, which is an earthquake-resistant structure 100.

[0037] In this embodiment, the downward direction in the vertical direction, which is the same direction as the vertical direction, will be simply referred to as "down," and the upward direction will be simply referred to as "up." For example, the lower beam 92 is positioned below the upper beam 91. Also, the direction from column 81 to column 82 will be referred to as "right," and the direction from column 82 to column 81 will be referred to as "left." For example, in the illustration in Figure 1, the vertical frame 8 on the left side of the figure is column 81, and the vertical frame 8 on the right side is column 82. Also, in this embodiment, the viewpoint from above looking downwards will be referred to as a top view, and the viewpoint in the left-right direction will be referred to as a side view. Furthermore, the direction perpendicular to the virtual plane that overlaps with column 81, column 82, upper beam 91, and lower beam 92 (hereinafter referred to as the virtual plane of the seismic-resistant structure 100) will be referred to as the depth direction. When viewing the seismic-resistant structure 100 along the depth direction, the side where column 81 is on the left and column 82 is on the right is called the front side in the depth direction, and the side where column 81 is on the right and column 82 is on the left is called the back side in the depth direction. In addition, the viewpoint from the front side to the back side in the depth direction is called the front view. For example, column 81, column 82, upper beam 91 and lower beam 92 form a rectangular frame in the front view.

[0038] The shear force absorbing member 1 may, for example, be supported by column 81 and column 82. The shear force absorbing member 1 is positioned within the area enclosed by column 81, column 82, upper beam 91, and lower beam 92.

[0039] In this embodiment, the shear force absorbing member 1 is positioned on a virtual plane of the seismic-resistant structure 100. In other words, as shown in Figure 2, in a side view of the seismic-resistant structure 100 from the left side (the side of the column 81), the shear force absorbing member 1 overlaps with the column 81 and column 82 (see Figure 1), and the shear force absorbing member 1 is in the same position as the virtual plane of the seismic-resistant structure 100 in the depth direction. Also, as shown in Figure 3, in a top view of the seismic-resistant structure 100, the shear force absorbing member 1 overlaps with the upper beam 91 and lower beam 92 (see Figure 1), and the shear force absorbing member 1 is in the same position as the virtual plane of the seismic-resistant structure 100 in the depth direction. By positioning the shear force absorbing member 1 in this way, the thickness of the load-bearing wall constructed by the seismic-resistant structure 100 can be kept thin.

[0040] In this embodiment, as shown in Figure 1, in the seismic-resistant structure 100, the shear force absorbing member 1 is supported on its left side by a column 81 and on its right side by a column 82.

[0041] The shear force absorbing member 1 may be supported by the column sections 81 and 82 via a plurality of frame members. For example, the shear force absorbing member 1 may be supported by the column section 81 via frame members 71, 72, and 73 which are supported by the column section 81. Alternatively, the shear force absorbing member 1 may be supported by the column section 82 via frame members 75, 76, and 77 which are supported by the column section 82.

[0042] Frame members 71, 72, 73, 75, 76, and 77 may be straight (rod-shaped). Frame members 71, 72, and 73 are supported at one end by column 81 and support the shear force absorbing member 1 at the other end. Frame members 75, 76, and 77 are supported at one end by column 82 and support the shear force absorbing member 1 at the other end. Hereafter, frame members such as frame members 71, 72, 73, 75, 76, and 77 that support the shear force absorbing member 1 on column 81 and 82 may be collectively referred to as support frames, etc.

[0043] Frame members 71, 72, 73 and frame members 75, 76, 77 may be arranged along the column sections 81, 82 and fixed to the column sections 81, 82 via auxiliary frames 81a, 82a fixed to these column sections 81, 82.

[0044] Frame member 71 is a diagonal member that extends in a downward and rightward inclination from the side supported by the column 82 to the side supporting the shear force absorbing member 1. Frame member 72 is a horizontal member that extends horizontally from the side supported by the column 82 to the side supporting the shear force absorbing member 1. Frame member 73 is a diagonal member that extends in a rightward inclination from the side supported by the column 82 to the side supporting the shear force absorbing member 1.

[0045] Frame member 75 is a diagonal member that extends in a downward and leftward direction from the side supported by the column 82 to the side supporting the shear force absorbing member 1. Frame member 76 is a horizontal member that extends horizontally from the side supported by the column 82 to the side supporting the shear force absorbing member 1. Frame member 77 is a diagonal member that extends in a upward and leftward direction from the side supported by the column 82 to the side supporting the shear force absorbing member 1.

[0046] In this embodiment, as shown in Figures 1 and 4, the shear force absorbing member 1 comprises plate-shaped absorbing portions 2, 2 bent into a U-shape when viewed from the front, separation prevention portions 3, 3 located inside the U-shape of the absorbing portion 2, a first support portion 41 which supports the shear force absorbing member 1 on the column portion 81 (see Figure 1), and a second support portion 42 which supports the shear force absorbing member 1 on the column portion 82 (see Figure 1). Figure 4 is a perspective view of the shear force absorbing member 1 viewed from diagonally above. In Figure 4, as an example, the case in which the shear force absorbing member 1 is symmetrical in the vertical direction. The shear force absorbing member 1 may be made of metal such as steel or an iron alloy such as stainless steel.

[0047] As shown in Figure 1, the absorption section 2 is an energy absorption mechanism that absorbs, buffers, or reduces the speed of relative movement of the column sections 81 and 82 as they move relative to each other along their extension direction.

[0048] The absorbent portion 2 is formed by bending a rectangular plate-shaped member so that the plate surface at one end of the plate-shaped member faces the plate surface at the other end. In other words, the absorbent portion 2 is formed in a U-shape when viewed from the front, and has a semicircularly curved portion 29, a flat plate portion 20 extending from one end of the curved portion 29, and a flat plate portion 20 extending from the other end of the curved portion 29. The plate-shaped member forming the absorbent portion 2 may be a single (single) member, or it may be a stack of multiple (two or more) members.

[0049] In the absorption section 2, the plate surface may be arranged to be perpendicular to the virtual plane of the seismic-resistant structure 100. In this embodiment, the curved section 29 and the flat sections 20, 20 are perpendicular to the virtual plane of the seismic-resistant structure 100.

[0050] The absorption section 2 may be positioned on a virtual plane of the seismic-resistant structure 100. In this embodiment, the curved section 29 and the flat sections 20, 20 are positioned on a virtual plane of the seismic-resistant structure 100.

[0051] The absorbent section 2 is fixed to the column sections 81 and 82 such that the extension direction of the flat plate section 20 is aligned with the extension direction of the column sections 81 and 82 (which is the same as the vertical direction in Figure 1). In other words, the flat plate sections 20, 20 are positioned along the column sections 81 and 82, respectively. The extension direction of the flat plate section 20 is the direction in which the flat plate section 20 extends from the curved section 29.

[0052] Of the two flat plate sections 20, 20, one flat plate section 20 is positioned close to the column section 81. Of the two flat plate sections 20, 20, the other flat plate section 20 is positioned close to the column section 82.

[0053] As shown in Figures 1 and 4, the shear force absorbing member 1 may be provided with a pair of absorbing parts 2,2. The absorbing parts 2,2 may be arranged, for example, along the vertical direction. In this embodiment, the absorbing parts 2,2 are arranged so that their curved parts 29,29 face each other. Specifically, the curved parts 29,29 form a pair, and the tops of this pair face each other. In other words, the U-shapes of the pair of absorbing parts 2,2 face opposite directions along the extending direction of the column part 81. The curved parts 29,29 may be in contact with each other or may be separated. In the following description, the upper absorbing part 2 will be described in detail. In this embodiment, the lower absorbing part 2 is the same as the upper absorbing part 2 with its top and bottom reversed.

[0054] As shown in Figure 1, the absorption section 2 may be supported by a first support section 41 and a second support section 42, respectively, which support the flat plate sections 20, 20. The flat plate sections 20, 20 may be supported on the outside of the U-shape of the absorption section 2 by the first support section 41 and the second support section 42. Figure 1 shows the case where the first support section 41 supports the flat plate section 20 on the side closer to the column section 81 (left side), and the second support section 42 supports the flat plate section 20 on the side closer to the column section 82 (right side).

[0055] The first support portion 41 and the second support portion 42 may each be formed of a plate-shaped member whose plate surface intersects with the flat plate portion 20 and which is aligned with the extending direction of the flat plate portion 20 (the same as the extending direction of the column portion 81).

[0056] The first support portion 41 and the second support portion 42 are, for example, rectangular in shape when viewed from the front.

[0057] The end of the first support portion 41 closest to the absorption portion 2 is connected, for example, by welding to the U-shaped outer surface of the absorption portion 2 on the flat plate portion 20 (flat plate portion 21). The first support portion 41 is erected so as to extend from the outer surface of the flat plate portion 20 in the left-right direction.

[0058] Similar to the first support portion 41, the end of the second support portion 42 closest to the absorption portion 2 is connected to the U-shaped outer surface of the absorption portion 2 on the flat plate portion 20 (flat plate portion 22) by, for example, welding. The second support portion 42 is erected so as to extend from the outer surface of the flat plate portion 20 (flat plate portion 22) in the left-right direction.

[0059] The first support portion 41 and the second support portion 42 support the respective flat plate portion 20 at a position near the end opposite to the curved portion 29. In Figures 4, 5, and 6, the flat portion of the flat plate portion 20 on the side of the curved portion 29 is shown as the intermediate flat plate portion 20b, and the flat portion of the flat plate portion 20 at a position further than the intermediate flat plate portion 20b and further than the curved portion 29 (a position near the end opposite to the curved portion 29) is shown as the tip flat plate portion 20a. The absorption portion 2 may be supported at the tip flat plate portions 20a, 20a by the first support portion 41 and the second support portion 42. For example, the tip flat plate portions 20a, 20a may be fixed to the first connecting portion 41 and the second connecting portion 42.

[0060] In this embodiment, the shear force absorbing member 1 is equipped with absorbing sections 2, 2, but the relative positions of each absorbing section 2 may be fixed. In the example shown in Figure 4, the pair of absorbing sections 2, 2 are supported as a pair by a single first support section 41, with the left side (the side closer to the column section 81 in Figure 1) of each absorbing section 2, 20 fixed as a pair. In addition, the pair of absorbing sections 2, 2 are supported as a pair by a single second support section 42, with the right side (the side closer to the column section 82 in Figure 1) of each absorbing section 2, 20 fixed as a pair.

[0061] As shown in Figure 1, the frame members 71, 72, and 73 may be fixed to the first support section 41 by welding, bolting, or other means. This fixes the absorption section 2 to the column section 81.

[0062] Furthermore, the frame members 75, 76, and 77 may be fixed to the second support section 42 by welding or bolting. This fixes the absorption section 2 to the column section 82.

[0063] The separation prevention part 3 shown in Figure 4 is a locking member that locks (restrains) one flat plate part 20 to the other flat plate part 20, allowing the flat plate parts 20, 20 to move relative to each other along their extending direction, while preventing the distance between the flat plate parts 20, 20 in the width direction of the U-shape of the absorption part 2 (the same as the left-right direction in Figure 1, and may hereafter be referred to as the width direction of the absorption part 2) from increasing (preventing separation in the width direction of the absorption part 2).

[0064] The separation prevention section 3 is positioned in the area outside the U-shape of the absorption section 2, that is, in the area excluding the space between the flat plate sections 20, 20 which is inside the U-shape of the absorption section 2. This makes it possible to form the shear force absorbing member 1 at low cost while maintaining a high capacity to absorb shear force. Specifically, by positioning the separation prevention section 3 in the area outside the U-shape of the absorption section 2, rather than in a narrow area such as the inside of the U-shape of the absorption section 2, the degree of freedom to select a structure with higher strength is increased, and it becomes easier to select an inexpensive shape, thereby making it possible to realize a shear force absorbing member 1 with a high capacity to absorb shear force at low cost. It is preferable that the separation prevention section 3 be positioned in the area outside the U-shape of the absorption section 2 when viewed from above.

[0065] In the following description, the separation prevention section 3 located primarily on the upper absorption section 2 will be described with reference, and any distinction between upper and lower sections will be clearly indicated. In this embodiment, the separation prevention section 3 of the lower absorption section 2 is the same as the separation prevention section 3 of the upper absorption section 2, but with the top and bottom reversed.

[0066] As shown in Figures 4 to 6, the separation prevention section 3 has a restraining section 30. The restraining section 30 restrains the pair of flat plate sections 20, 20 of the absorption section 2 so that they do not separate from each other in the width direction.

[0067] As shown in Figure 6, the restraining portion 30 is, for example, a U-shaped member with sharp corners (like the Japanese character "コ") when viewed from above.

[0068] The restraining portion 30 is positioned such that the surface of the absorbing portion 2 facing the depth direction is opposed to the inner surface (side of the recess) of its U-shape, and the absorbing portion 2 is fitted inside the U-shape.

[0069] The restraining portion 30 has a pair of restricting portions 51, 52 positioned on the outside in the width direction of the U-shape of the absorber portion 2 between one flat plate portion 20 and the other flat plate portion 20, and a bridging portion 50 positioned between the restricting portions 51, 52 and connecting the pair of restricting portions 51, 52. The restraining portion 30 may be formed, for example, by bending a rectangular plate-like member into an angular U-shape. For example, the restraining portion 30 may have a flat plate-like bridging portion 50 and plate-like restricting portions 51, 52 extending from both ends of the bridging portion 50 toward the absorber portion 2 in the depth direction.

[0070] The crosslinking portion 50 may be formed, for example, in the shape of a flat plate. The crosslinking portion 50 may be arranged along the surface of the absorption portion 2 that faces in the depth direction.

[0071] The restricting portions 51 and 52 are positioned on the outside in the width direction of the U-shape of the absorbent portion 2 in the flat plate portions 20 and 20. The restricting portions 51 and 52 are positioned in contact with or close to the outer surface in the width direction of the U-shape of the absorbent portion 2 in the flat plate portions 20 and 20. For example, restricting portion 51 is positioned on the outside in the width direction of the U-shape of the absorbent portion 2 in the flat plate portion 21. Also, restricting portion 52 is positioned on the outside in the width direction of the U-shape of the absorbent portion 2 in the flat plate portion 22. In other words, when viewed along the width direction of the U-shape of the absorbent portion 2, the restricting portions 51 and 52 overlap with the pair of flat plate portions 20 and 20.

[0072] In this embodiment, the restricting portion 51 is a non-sliding restricting portion on one of the flat plate portions 20 (flat plate portion 21) that restricts the vertical movement of the absorbent portion 2 in the U-shape relative to the outer surface of the U-shape of the absorbent portion 2 in the width direction. In this embodiment, the vertical direction of the U-shape of the absorbent portion 2 is aligned with the vertical direction.

[0073] In this embodiment, the restricting portion 51 is fixed as a non-sliding restricting portion to the outer surface in the width direction of the U-shape of the absorbent portion 2 on one of the flat plate portions 20, either directly or indirectly. This fixing may be, for example, by welding. Figure 6 illustrates a case in which the restricting portion 51 is joined by welding to a first support portion 41 fixed to one of the flat plate portions 20 (flat plate portion 21), thereby indirectly fixing the restricting portion 51 to the flat plate portion 20 via the first support portion 41. Hereafter, the fact that the restricting portion 51 is directly or indirectly fixed to the flat plate portion 20 may be simply described as "the restricting portion 51 is fixed to the flat plate portion 20."

[0074] In this embodiment, the restricting portion 51 is fixed to the flat plate portion 20, which prevents the restraining portion 30 from separating from the absorption portion 2 in the width direction.

[0075] The restricting portion 52 is a sliding restricting portion on the other flat plate portion 20 (flat plate portion 22) that is slidable (relatively movable while in contact) with respect to the outer surface in the width direction of the U-shape of the absorbent portion 2.

[0076] The separation prevention section 3 may have one or more restraining sections 30 for each absorption section 2. Figure 6 shows a case where the separation prevention section 3 has a restraining section 30 (restraining section 31) located on the outside of the U-shape of the absorption section 2, on one side (front side) in the depth direction of the U-shape of the absorption section 2, and a restraining section 30 (restraining section 32) located on the other side (back side) in the depth direction of the U-shape of the absorption section 2. Figure 6 illustrates a case where the restraining section 31 and the restraining section 32 are symmetrical in the depth direction, but is not limited to this.

[0077] As shown in Figure 1, in the seismic-resistant structure 100, two or more shear force absorbing members 1 may be placed between column sections 81 and 82, which are an example of a pair of structural elements. In this case, the shear force absorbing members 1 may be arranged, for example, at equal intervals along the extending direction of the column section 81. In Figure 1, if one shear force absorbing member 1 and a support frame etc. that is paired with this shear force absorbing member 1 are referred to as mechanism A, then an example is shown where this mechanism A is arranged between the column sections 81 and 82 along the extending direction of the column section 81. Adjacent mechanisms A, A do not need to be in contact or touching, and may be spaced apart. The seismic-resistant structure 100 has multiple shear force absorbing members 1 (mechanism A), which improves the load-bearing capacity of the seismic-resistant structure 100.

[0078] The length of the intermediate plate section 20b along the extension direction of the plate section 20 is determined based on the vertical and horizontal widths of the seismic-resistant structure 100 and the amount of deformation allowed by the seismic-resistant structure 100 (the relative displacement between the column sections 81 and 82 in the direction along these extension directions). In other words, the length of the intermediate plate section 20b is set to the length that allows the above amount of deformation. This makes it possible to absorb shear force in the absorption section 2, as will be described later.

[0079] Next, the operation and function of the shear force absorbing member 1 and the seismic-resistant structure 100 will be explained.

[0080] As shown in Figure 7, when the column sections 81 and 82 move relative to each other along their extension directions, the absorption section 2 of the shear force absorbing member 1 deforms to absorb the shear force and other forces that occur when the column sections 81 and 82 move relative to each other.

[0081] Specifically, as shown in Figures 8 and 9, in the absorption section 2, the flat plate sections 20, 20 move relative to each other along the extending direction of the column sections 81, 82 (see Figure 7). When the flat plate sections 20, 20 move relative to each other, bending forces are applied to the curved section 29 and the intermediate flat plate sections 20b, 20b (see Figure 8), which are the ends of the flat plate sections 20, 20 connected to the curved section 29. Specifically, a bending force is applied to one of the intermediate flat plate sections 20b so that it curves, and a force is applied to the curved section 29 so that it bends back to a flat shape. The other intermediate flat plate section 20b simply moves. When these curved section 29 and intermediate flat plate sections 20b, 20b (i.e., the absorption section 2) deform due to this bending force, they absorb, buffer, or reduce the speed of relative movement of the column sections 81, 82 as they move relative to each other. When a pair of absorbent parts 2,2 are provided, the lower absorbent part 2 deforms in the same way as the upper absorbent part 2, as shown in Figure 9.

[0082] As described above, when the absorption section 2 absorbs shear forces, etc., when the column sections 81 and 82 move relative to each other, the flat plate sections 20, 20 are prevented from separating from the absorption section 2 in the width direction by the separation prevention section 3. This prevents a decrease in the absorption capacity of the absorption section 2 for shear forces, etc., when the flat plate sections 20, 20 separate from the absorption section 2 in the width direction. Because the absorption section 2 has the separation prevention section 3, the amount of energy such as shear forces that the absorption section 2 can absorb is, for example, more than twice that of the absorption section 2 without the separation prevention section 3.

[0083] If the length of the intermediate flat plate section 20b along the extension direction of the flat plate section 20 is a length that allows for the amount of deformation permitted by the seismic-resistant structure 100, then when the curved section 29 and the intermediate flat plate sections 20b, 20b deform and absorb shear force, the intermediate flat plate sections 20b, 20b function as a deformation allowance within this length range.

[0084] Furthermore, the shear force absorbing member 1 and the seismic-resistant structure 100 described in this embodiment are also valid even if the left and right sides are reversed.

[0085] As described above, the shear force absorbing member 1 and the seismic-resistant structure 100 prevent the flat plate sections 20, 20 from separating in the width direction of the absorption section 2 at the separation prevention section 3, thereby better absorbing the shear force between a pair of structural elements such as the vertical frames 8, 8.

[0086] (Modification 1 of the first embodiment) In the seismic-resistant structure 100 of the first embodiment, the support frame and the like that supporting the shear force absorbing member 1 can be omitted.

[0087] Figure 10 illustrates a modified example in which the shear force absorbing member 1 is supported by vertical frames 8,8 (column sections 81, 82) with a first support section 41 that is directly fixed and supported to one vertical frame 8 (column section 81), and a second support section 42 that is directly fixed and supported to the other vertical frame 8 (column section 82).

[0088] Furthermore, Figure 10 illustrates a case where four shear force absorbing members 1 (mechanism A) are arranged in a specific configuration.

[0089] In this modified example, the first support portion 41 may be directly fixed to the column portion 81 by spot welding at multiple points or by line welding at multiple points, with unwelded portions existing at regular intervals along the extending direction of the column portion 81. The second support portion 42 may also be directly fixed to the column portion 81 by spot welding or line welding.

[0090] For example, if the upper beam 91 moves horizontally and the column sections 81 and 82 move relative to each other along their extension direction, the bending moment applied to the intermediate position between adjacent shear force absorbing members 1 and 1 in the seismic-resistant structure 100, i.e., the boundary portion between mechanisms A and A, becomes zero. Furthermore, the bending moment applied near this boundary portion is smaller than the bending moment applied to the portion further away from this boundary portion. For this reason, the vertical width of the first support section 41 may be wider on the side closer to the column section 81 and narrower on the side further away from the column section 81. Similarly, the vertical width of the second support section 42 may be wider on the side closer to the column section 82 and narrower on the side further away from the column section 82. As described above, by varying the width of the first support section 41 and the second support section 42 so that they become narrower as they move away from the column sections 81 and 82, the weight of the seismic-resistant structure 100 can be reduced without weakening the load-bearing capacity of the seismic-resistant structure 100, and the amount of materials required can be reduced, compared to the case where the first support section 41 and the second support section 42 are rectangular in shape when viewed from the front.

[0091] (Modification 2 of the first embodiment) In the seismic-resistant structure 100, the shear force absorbing member 1 may be directly fixed to one vertical frame 8 (column portion 81) via a support frame or the like, as shown in Figure 11. Figure 11 shows the case where the first support portion 41 is smaller than the width of the second support portion 42 in the left-right direction.

[0092] (Modification 3 of the first embodiment) In the seismic-resistant structure 100, the shear force absorbing member 1 may be directly fixed to one vertical frame 8 (column portion 81) by a first support portion 41, and to the other vertical frame 8 (column portion 82) by a second support portion 42, as shown in Figure 12.

[0093] Furthermore, the shear force absorbing member 1 and the seismic-resistant structure 100 described in the above modifications can be modified in the same way as in the case where the left and right sides of the seismic-resistant structure 100 are reversed. For example, the first support part 41 and the second support part 42 can be swapped left and right, and the distinction between first and second is for the convenience of explanation in this embodiment.

[0094] (Second embodiment) In the first embodiment, the shear force absorbing member 1 in the seismic-resistant structure 100 is oriented such that the extension direction of the flat plate portion 20 of its absorption section 2 is aligned with the extension direction of the vertical frames 8,8 (column portions 81,82), and the flat plate portions 20,20 of the absorption section 2 are fixed to the column portions 81,82. In the second embodiment, as shown in Figure 13, the orientation of the shear force absorbing member 1 differs from that of the first embodiment, with the extension direction of the flat plate portion 20 of its absorption section 2 being aligned with the extension direction of the horizontal frames 9,9 (upper beam 91 and lower beam 92). In the following description, the differences from the first embodiment will be the main focus, and explanations of the same parts will be omitted as appropriate.

[0095] The seismic-resistant structure 100 according to this embodiment comprises a shear force absorbing member 1 and a pair of structural horizontal frames 9,9, which are an upper beam 91 and a lower beam 92. The absorbing portions 2,2 of the shear force absorbing member 1 are such that one flat plate portion 20 is supported by the upper beam 91, which is one horizontal frame 9, and the other flat plate portion 20 is supported by the lower beam 92, which is the other horizontal frame 9.

[0096] The shear force absorbing member 1 and the seismic-resistant structure 100 can better absorb the shear force generated between the upper beam 91 and the lower beam 92 along the direction of extension of the upper beam 91.

[0097] The shear force absorbing member 1 may be supported at its first support section 41 via frame members 71 and 75, one end of which is supported by the upper beam 91. It may also be supported at its second support section 42 via frame members 73 and 77, one end of which is supported by the lower beam 92. The frame members 71, 73, 75, and 77 may be supported at one end at the corners where the upper beam 91 and column section 81 intersect, the corners where the lower beam 92 and column section 81 intersect, and the corners where the lower beam 92 and column section 82 intersect. The other end of the frame members 71 and 75 may be fixed to the first support section 41. The other end of the frame members 73 and 77 may be fixed to the second support section 42.

[0098] As described above, the shear force absorbing member 1 and the seismic-resistant structure 100 prevent the flat plate sections 20, 20 from separating in the width direction of the absorption section 2 at the separation prevention section 3, thereby better absorbing the shear force between a pair of structural elements such as the horizontal frames 9, 9.

[0099] (Modification 1 of the second embodiment) In the seismic-resistant structure 100 of the second embodiment, the support frame and the like that supporting the shear force absorbing member 1 can be omitted, similar to the case of modification 1 of the first embodiment.

[0100] Figure 14 illustrates a modified example in which the shear force absorbing member 1 is supported by the upper beam 91 and the lower beam 92 by a first support portion 41 directly fixed to the upper beam 91 and a second support portion 42 directly fixed to the lower beam 92.

[0101] (Modification 2 of the second embodiment) In the seismic-resistant structure 100, the shear force absorbing member 1 may be directly fixed to one horizontal frame 9 (upper beam 91) at the first support portion 41, as shown in Figure 15, and fixed to the other horizontal frame 9 (lower beam 92) via a support frame or the like. Figure 15 shows the case where the first support portion 41 is directly fixed to one horizontal frame 9 (upper beam 91). Although not shown in the illustration, the same deformation as this modified example can be observed even if the structure of the seismic-resistant structure 100 is inverted vertically.

[0102] (Modification 3 of the second embodiment) In the seismic-resistant structure 100, the shear force absorbing member 1 may be directly fixed to one horizontal frame 9 (upper beam 91) by a first support portion 41, and to the other horizontal frame 9 (lower beam 92) by a second support portion 42, as shown in Figure 16.

[0103] Furthermore, the shear force absorbing member 1 and the seismic-resistant structure 100 described in the above modifications can be modified in the same way as in the above modifications, even if the upper and lower parts of the structure of the seismic-resistant structure 100 are inverted. For example, the first support part 41 and the second support part 42 can be swapped left and right, and the distinction between first and second is for the convenience of explanation in this embodiment.

[0104] (Third embodiment) In the above embodiment, the separation prevention part 3 has a restraining part 30 (restraining part 31) located on the outside of the U-shape of the absorption part 2, on one side (front side) in the depth direction of the U-shape of the absorption part 2, and a restraining part 30 (restraining part 32) located on the other side (back side) in the depth direction of the U-shape of the absorption part 2, and the case in which the restraining part 31 and the restraining part 32 are plane-symmetric in the depth direction was illustrated as an example. In the third embodiment, as shown in Figure 17, the structure of the restraining part 32 differs from the above embodiment in that the structure of the restraining part 31 which is plane-symmetric is further reversed in the left-right direction, but otherwise it is the same. In the following description, the differences from the first embodiment will be explained in detail, and explanations of the same parts will be omitted as appropriate.

[0105] The restricting portion 51 (non-sliding side restricting portion) of the restraining portion 32 is joined and fixed by welding to the second support portion 42 which is fixed to the other flat plate portion 20 (flat plate portion 22).

[0106] As shown in Figure 1, when the column portions 81 and 82 are not moving relative to each other along their extension directions, as shown in Figure 18, in a front view, the rear restraint portion 30 (restraint portion 32, see Figure 17) in the depth direction overlaps with the front restraint portion 30 (restraint portion 31) in the depth direction.

[0107] As shown in Figure 7, when the column sections 81 and 82 move relative to each other along their extension direction, the absorption section 2 of the shear force absorbing member 1 deforms as shown in Figure 19 to absorb the shear force and other forces that occur when the column sections 81 and 82 (see Figure 7) move relative to each other.

[0108] As shown in Figure 19, the separation prevention section 3 has a restraining section 30 (restraining section 31) positioned on one side (front side) in the depth direction of the U-shape of the absorption section 2, and a restraining section 30 (restraining section 32) positioned on the other side (back side) in the depth direction of the U-shape of the absorption section 2. The structure of the restraining section 32 is a reversal of the structure of the restraining section 31, which is plane-symmetrical, in the left-right direction. This enhances the effect of restraining the flat plate sections 20, 20 so that they do not separate in the width direction of the U-shape of the absorption section 2, compared to the case where the restraining section 31 is plane-symmetrical and only the bottom is affected. Specifically, when the absorption section 2 deforms, the restraining section 31 and the restraining section 32 can restrain the upper and lower ends of the flat plate sections 20, 20. Therefore, compared to the case where the restraining section 31 and the restraining section 32 are located in the same position when the absorption section 2 deforms (as illustrated in the first and second embodiments), the effect of restraining the flat plate sections 20, 20 so that the distance between them in the width direction of the U-shape of the absorption section 2 does not increase is enhanced.

[0109] (Fourth embodiment) In the above embodiment, the shear force absorbing member 1 is provided with a pair of absorbing parts 2, 2, as shown in Figures 1 and 4, and the absorbing parts 2, 2 are arranged, for example, along the vertical direction, with their curved parts 29, 29 facing each other. Furthermore, the separation prevention part 3 is described as having a restraining part 30 that restrains a pair of flat plate parts 20, 20 so that the distance between one flat plate part 20 (for example, flat plate part 21) extending from one end of the curved part 29 in the U shape of the absorbing part 2 and the other flat plate part 20 (for example, flat plate part 22) extending from the other end of the curved part 29 does not increase. In addition, the case in which the restraining part 30 that restrains the flat plate parts 20, 20 of one absorbing part 2 and the restraining part 30 that restrains the flat plate parts 20, 20 of the other absorbing part 2 are separate parts is described as an example. In the fourth embodiment, as shown in Figure 20, the restraining portion 30 that restrains the pair of flat plate portions 20, 20 in one absorption portion 2 also restrains the pair of flat plate portions 20, 20 in the other absorption portion 2, which is different from the above embodiment, but otherwise it is the same. In the following description, the differences from the first embodiment will be explained in detail, and explanations of the same parts will be omitted as appropriate.

[0110] The restraining portion 30 that restrains a pair of flat plate portions 20, 20 in one absorption portion 2 also restrains a pair of flat plate portions 20, 20 in the other absorption portion 2 can be rephrased as follows: In this embodiment, the restraining portion that restrains a pair of flat plate portions 20, 20 in one absorption portion 2 and the restraining portion that restrains a pair of flat plate portions 20, 20 in the other absorption portion 2 are integrally formed restraining portion 30, as shown in Figure 20. This can reduce the number of parts and potentially lower costs.

[0111] As described above, we can provide a shear force absorbing member and an earthquake-resistant structure that can better absorb shear force.

[0112] [Another embodiment] (1) In the above embodiment, as shown in Figure 4 and the like, the case in which the shear force absorbing member 1 has two absorption parts 2 has been described as an example. However, the shear force absorbing member 1 may have only one absorption part 2. If the separation prevention part 3 can prevent the flat plate parts 20, 20 from separating in the width direction of the absorption part 2, the shear force absorbing member 1 can effectively absorb the shear force etc. generated in the seismic-resistant structure 100.

[0113] (2) In the above embodiment, the separation prevention part 3 was described as having a restraining part 30 (restraining part 31) located on the outside of the U-shape of the absorption part 2 and on one side (front side) in the depth direction of the U-shape of the absorption part 2, and a restraining part 30 (restraining part 32) located on the other side (back side) in the depth direction of the U-shape of the absorption part 2. Furthermore, the regulating part 51 was described as a non-sliding side regulating part on one flat plate part 20 (flat plate part 21) that restricts the vertical movement of the U-shape of the absorption part 2 with respect to the outer surface in the width direction of the U-shape of the absorption part 2, and is fixed by welding to a first support part 41 fixed to one flat plate part 20 (flat plate part 20). In this case, the separation prevention part 3 may have one restraining part 30 and the other restraining part 30 in the depth direction connected, fastened, or restrained to each other. In this case, the separation prevention section 3 may be connected, fastened, or restrained such that one restraining section 30 and the other restraining section 30 in the depth direction do not separate in the depth direction.

[0114] Figures 21 to 23 illustrate an example in which the separation prevention section 3 has a fastening section 61 that restrains one restraining section 30 and the other restraining section 30 (see Figure 21) in the depth direction. The fastening section 61 may be located inside the U-shape of the absorption section 2 and penetrates the depth direction of the U-shape of the absorption section 2. This prevents the one restraining section 30 and the other restraining section 30 in the depth direction from separating when the absorption section 2 deforms (see Figure 23), thereby preventing the restraining section 30 from separating from the absorption section 2 in the width direction, and ensuring that the restraining section 30 restrains the pair of flat plate sections 20, 20 of the absorption section 2 so that they do not separate in the width direction. The fastening section 61 may be a wire, a combination of a bolt and a screw hole, a combination of a bolt and a nut, etc.

[0115] If the fastening portion 61 is located inside the U-shape of the absorption portion 2 and penetrates the depth direction of the U-shape of the absorption portion 2, it is preferable that the fastening portion 61 is further positioned closer to the sliding side restricting portion 52 than to the non-sliding side restricting portion 51. This prevents the restricting portion 50 from separating in the width direction from the absorption portion 2 on the side of the restricting portion 52, which is not fixed and is more mobile in the depth direction, than the side of the restricting portion 51, which is fixed to the flat plate portion 20 (first support portion 41).

[0116] (3) In the above embodiment, the separation prevention part 3 was described as having a restraining part 30 (restraining part 31) located on the outside of the U-shape of the absorption part 2 and on one side (front side) in the depth direction of the U-shape of the absorption part 2, and a restraining part 30 (restraining part 32) located on the other side (back side) in the depth direction of the U-shape of the absorption part 2. Furthermore, the regulating part 51 was described as a non-sliding regulating part that restricts the vertical movement of the U-shape of the absorption part 2 with respect to the outer surface in the width direction of the U-shape of the absorption part 2 on one of the flat plate parts 20 (flat plate part 21), and is fixed by welding to a first support part 41 fixed to one of the flat plate parts 20 (flat plate part 20). However, the regulating part 51 only needs to restrict vertical movement and does not necessarily need to be fixed to the flat plate part 20 (first support part 41) by welding or the like.

[0117] Figures 24 to 26 show a case where one of the flat plate portions 20 (flat plate portion 21) has a projection 59 extending along the width direction on its outer surface in the width direction. This projection 59 is positioned to restrict the movement of the restraining portion 30 in the vertical direction. Figures 24 to 26 show a case where the projection 59 is positioned directly above and directly below the restricting portion 51, restricting the movement of the restricting portion 51 in the vertical direction.

[0118] In addition, Figures 24 to 26 illustrate the case where, as illustrated in the fourth embodiment above, the restraining portion 30 that restrains the pair of flat plate portions 20, 20 in one absorbent portion 2 also restrains the pair of flat plate portions 20, 20 in the other absorbent portion 2. However, even when the restraining portion 30 that restrains the flat plate portions 20, 20 of one absorbent portion 2 and the restraining portion 30 that restrains the flat plate portions 20, 20 of the other absorbent portion 2 are separate, if the projections 59 are positioned directly above and directly below the restricting portion 51, the vertical movement of the restricting portion 51 can be restricted.

[0119] If the restricting portion 51 is not fixed to the flat plate portion 20, the restraining portion 30 may easily separate from the absorption portion 2 in the width direction. Therefore, if the restricting portion 51 is not fixed to the flat plate portion 20, the separation prevention portion 3 may have a fastening portion 62 that restrains one restraining portion 30 and the other restraining portion 30 (see Figure 21) in the depth direction.

[0120] The fastening portion 62 may be positioned inside the U-shape of the absorption portion 2 and penetrating in the depth direction of the U-shape of the absorption portion 2. This prevents one restraining portion 30 and the other restraining portion 30 from separating in the depth direction when the absorption portion 2 deforms (see Figure 26), thereby preventing the restraining portion 30 from separating from the absorption portion 2 in the width direction, and ensuring that the restraining portion 30 restrains the pair of flat plate portions 20, 20 of the absorption portion 2 so that they do not separate in the width direction.

[0121] Furthermore, if the separation prevention unit 3 has a fastening unit 61 positioned closer to the sliding side restricting unit 52 than to the non-sliding side restricting unit 51, the fastening unit 62 may be positioned closer to the restricting unit 51 than the fastening unit 61.

[0122] The shear force absorbing member 1 according to this alternative embodiment may be easier to manufacture compared to the shear force absorbing member 1 in which the restricting portion 51 is fixed by welding. Furthermore, when painting the shear force absorbing member 1 according to this alternative embodiment (for example, by electrodeposition coating), the restraining portion 30 and the absorbing portion 2 can be painted separately, which makes it easier to suppress problems caused by residual coating liquid, such as the coating liquid (electrodeposition liquid) accumulating in the recesses of the U-shape of the absorbing portion 2, and also makes it easier to avoid cases where the coating liquid does not reach the contact areas between parts, resulting in poor coating. In other words, the shear force absorbing member 1 according to this alternative embodiment is easier to paint and has improved coating quality compared to the shear force absorbing member 1 in which the restricting portion 51 is fixed by welding.

[0123] (4) In the above embodiment, the separation prevention part 3 was described as having a restraining part 30 (restraining part 31) located on the outside of the U-shape of the absorption part 2 and on one side (front side) in the depth direction of the U-shape of the absorption part 2, and a restraining part 30 (restraining part 32) located on the other side (back side) in the depth direction of the U-shape of the absorption part 2. Furthermore, the regulating part 51 was described as a non-sliding side regulating part that restricts the vertical movement of the U-shape of the absorption part 2 with respect to the outer surface in the width direction of the U-shape of the absorption part 2 on one of the flat plate parts 20 (flat plate part 21), and is fixed by welding to the first support part 41 fixed to one of the flat plate parts 20 (flat plate part 20). However, the regulating part 51 is not limited to being fixed by welding or the like.

[0124] The restricting portion 51 may be fastened, for example, to a first support portion 41 fixed to one of the flat plate portions 20 (flat plate portion 20), as shown in Figures 27 to 29. Figures 27 to 29 illustrate a case where a rib 51a is provided at the end of the restricting portion 51 in the width direction, extending from that end along the width direction and along the plate surface of the first support portion 41, and this rib 51a and the first support portion 41 are fastened together with a fastener 65, for example, consisting of a bolt and a nut. Thus, the restricting portion 51 is indirectly fixed to the flat plate portion 20 via the first support portion 41, and its movement in the vertical direction is restricted when the absorption portion 2 deforms (see Figure 29). By fixing the restricting portion 51 to the flat plate portion 20, the restraining portion 30 is also prevented from separating from the absorption portion 2 in the width direction.

[0125] The shear force absorbing member 1 according to this alternative embodiment may be easier to manufacture compared to the shear force absorbing member 1 in which the restricting portion 51 is fixed by welding. Furthermore, when painting the shear force absorbing member 1 according to this alternative embodiment (for example, by electrodeposition coating), the restraining portion 30 and the absorbing portion 2 can be painted separately, which makes it easier to suppress problems caused by residual coating liquid, such as the coating liquid (electrodeposition liquid) accumulating in the recesses of the U-shape of the absorbing portion 2, and also makes it easier to avoid cases where the coating liquid does not reach the contact areas between parts, resulting in poor coating. In other words, the shear force absorbing member 1 according to this alternative embodiment is easier to paint and has improved coating quality compared to the shear force absorbing member 1 in which the restricting portion 51 is fixed by welding.

[0126] (5) In the above embodiment, the case in which the bridging portion 50 of the restraining portion 30 is formed in a flat plate shape was described. However, the bridging portion 50 may have through holes formed along the depth direction.

[0127] Figures 30 and 31 illustrate a case in which, when the absorbent portion 2 is not deformed, an inner through-hole 55 located in the inner region of the U-shape of the absorbent portion 2 and an outer through-hole 56 located in the outer region of the U-shape of the absorbent portion 2 are formed in the bridging portion 50 as through-holes formed along the depth direction. The shape of these through-holes is not particularly limited and may be circular, rectangular, or other shapes. Figure 30 illustrates, as an example, a case in which the inner through-hole 55 and the outer through-hole 56 are circular. Figure 31 illustrates a case in which the inner through-hole 55 is circular and the outer through-hole 56 is rectangular.

[0128] The shear force absorbing member 1 according to this alternative embodiment is easier to paint and offers improved paint quality compared to the shear force absorbing member 1 in which through holes are not formed in the bridging portion 50. More specifically, when painting (for example, electrodeposition coating) the shear force absorbing member 1 without disassembling it, the coating liquid can enter and exit through the inner through holes 55 and the outer through holes 56. This makes it easier to avoid problems caused by residual coating liquid, such as the coating liquid (electrodeposition liquid) accumulating in the recesses of the U-shaped absorption portion 2, or poor painting due to the coating liquid not flowing in.

[0129] (6) In the above embodiment, the distance between the vertical frames 8,8 or horizontal frames 9,9, which are a pair of structures, may be determined as appropriate. Note that if the distance between the pair of structures, for example the distance between the vertical frames 8,8 or the distance between the horizontal frames 9,9 is increased, the force in the direction intersecting each structure (for example, the horizontal force on the vertical frames 8,8) that can be allowed by a single shear force absorbing member can be increased due to the aspect ratio.

[0130] Furthermore, the configurations disclosed in the above embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with configurations disclosed in other embodiments, as long as no inconsistencies arise. Moreover, the embodiments disclosed herein are illustrative, and the embodiments of the present invention are not limited thereto, and can be modified as appropriate without departing from the object of the present invention. [Industrial applicability]

[0131] This invention can be applied to shear force absorbing members and earthquake-resistant structures. [Explanation of symbols]

[0132] 1: Shear force absorbing member 100: Earthquake-resistant structure 2: Absorbent part 20: Flat plate part 20a:Tip flat plate part 20b: Intermediate flat plate part 21: Flat plate part 22: Flat plate part 29: Curved section 3: Separation prevention part 30: Restraint part 31: Restraint part 32: Restraint part 41:First support part 42:Second support part 50:Bridge part 51: Regulating part (non-sliding side regulating part) 52: Regulating part (sliding side regulating part) 55:Inner through hole 56:Outer through hole 59:Protrusion 61: Fastening part 62: Fastening part 65: Fastening part 71:Frame material 72: Frame material 73: Frame material 75: Frame material 76:Frame material 77: Frame material 8: Vertical frame (structure) 81:Column part 81a: Auxiliary frame 82:Column part 82a: Auxiliary frame 9: Horizontal frame (structure) 91: Upper beam 92: Lower beam A:Mechanism

Claims

1. A plate-shaped absorbent section bent into a U-shape, The absorption section comprises a separation prevention section positioned on the outside of the U-shape, The separation prevention portion has a restraining portion that restrains a pair of flat plate portions so that the distance between one flat plate portion extending from one end of the curved portion in the U-shape of the absorption portion and the other flat plate portion extending from the other end of the curved portion does not increase. The restraining portion is a shear force absorbing member having a set of restricting portions arranged on the outside in the width direction of the U-shape of the absorbing portion in one of the flat plate portions and the other flat plate portion.

2. The shear force absorbing member according to claim 1, wherein the restricting portion overlaps with the pair of flat plate portions when viewed along the width direction.

3. One of the restricting portions is a non-sliding restricting portion that restricts the vertical movement of the U-shaped absorption portion with respect to the outer surface in the width direction of one of the flat plate portions. The shear force absorbing member according to claim 2, wherein the other restricting portion is a sliding restricting portion of the other flat plate portion that is slidable with respect to the outer surface in the width direction.

4. The shear force absorbing member according to claim 3, wherein the non-sliding restricting portion is fixed to the outer surface in the width direction of one of the flat plate portions.

5. One of the flat plates has a projection extending along the width direction on its outer surface in the width direction, The shear force absorbing member according to claim 3, wherein the projection restricts the vertical movement of the non-sliding side restricting portion in the U-shape of the absorbing portion.

6. The shear force absorbing member according to claim 4, wherein the restraining portion has a bridging portion that connects a pair of the restricting portions.

7. The separation prevention unit is, The restraining portion is located on one side in the depth direction of the U-shape of the absorption portion, The shear force absorbing member according to claim 6, further comprising the restraining portion disposed on the other side in the depth direction.

8. The shear force absorbing member according to claim 7, wherein the separation prevention portion has a fastening portion that restrains one of the restraining portions and the other restraining portion in the depth direction.

9. The fastening portion is located inside the U-shape of the absorption portion and penetrates the U-shape of the absorption portion in the depth direction, as described in claim 8.

10. The shear force absorbing member according to claim 9, wherein the fastening portion is positioned closer to the sliding side restricting portion than the non-sliding side restricting portion.

11. The aforementioned absorption section is provided in a pair, The shear force absorbing member according to claim 8, wherein the pair of absorbing portions are arranged on the same virtual plane with their tops facing each other.

12. The shear force absorbing member according to claim 9, wherein the restraining portion that restrains a pair of flat plate portions in one of the absorbing portions and the restraining portion that restrains a pair of flat plate portions in the other absorbing portion are integrally formed.

13. The shear force absorbing member according to claim 12, wherein the restraining portion has a through hole formed along the depth direction.

14. A shear force absorbing member as described in any one of claims 1 to 13, Equipped with a pair of structures, The shear force absorbing member has an earthquake-resistant structure in which one of its flat plates is supported by one of the structures and the other of its flat plates is supported by the other structure.

15. It further includes a plate-shaped support part, The aforementioned support portion is The plate surface is arranged so as to intersect with the flat plate portion and along the direction in which the flat plate portion extends. Supported by the aforementioned structure, The seismic-resistant structure according to claim 14, wherein the absorbent portion is supported by the support portion on the outer side of the U-shape of the absorbent portion in the flat plate portion.

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