JP5626924B2 - Damper - Google Patents

Description

  The present invention relates to a damper that is incorporated in a load-bearing wall of a house such as a steel frame or other building and absorbs energy applied by an earthquake or the like.

  FIG. 16 shows a conventional example of a damper incorporated in a residential load-bearing wall. In the conventional example shown in FIGS. 16A and 16B, an H-shaped steel 30 is used as a damper, and this is disposed in the load bearing wall so that the web portion 30a is perpendicular to the wall surface of the load bearing wall. It joins to the brace 34 and the K-shaped brace 35, and the deformation | transformation capability is ensured by the said web part 30a. In the conventional example shown in FIG. 16C, a steel plate panel 31 is used as a damper, and this is arranged in the load bearing wall so as to be parallel to the wall surface of the load bearing wall and joined to the K-type brace 35. The slit 31a is formed in the inner wall to ensure the deformation ability. In the conventional example shown in FIG. 16 (D), an extremely low yield point steel plate 32 is used as a damper, and this is disposed in the load bearing wall so as to be parallel to the wall surface of the load bearing wall and joined to the X-type brace 34A. The bending ability is secured by the elongation ability of the low yield point steel plate 32.

  In addition, a shear damper 33 joined to the beam 36 and the brace 37 as shown in FIG. 17A, and a stud-type bearing wall in which the shear damper 33 is joined to the stud 38 as shown in FIG. Has been.

JP 2009-108668 A JP 2010-121348 A Japanese Patent No. 4580458

When a steel damper is used as the energy absorbing element, the deformability is excellent in bending deformation, but the yield strength is low and the amount of steel is increased. On the other hand, high yield strength can be expected in shear deformation, but deformation capacity is poor.
In order to stably absorb seismic energy that repeatedly acts, a balance between proof stress and deformation capacity is required.

Therefore, as shown in FIG. 16C, the damper is subjected to processing such as slitting, or as shown in FIG. 16D, a steel material having a high elongation capability such as a low yield point steel is used. There is a need.
However, when processing such as slitting is performed, the number of processing steps increases and the manufacturing cost increases. When a special steel material such as a low yield point steel is used, the material cost becomes high.

  By utilizing the strength of both shear and bending and adding a bending component to the damper deformation in addition to the shearing component, it is considered that a stable energy absorption capacity can be obtained for earthquakes that repeatedly act.

  An object of the present invention is to provide a damper that uses a normal steel material and that can obtain stable energy absorption and a large deformation capability without performing processing such as slitting.

The damper of the present invention is a damper attached to a building,
A pair of parallel plate portions arranged to face each other in parallel, a plate-like web portion for energy absorption obtained by connecting the pair of parallel plate portions, and a pair connected between both ends of the pair of parallel plate portions, respectively. And the pair of vertical plates are joined to an upper portion and a lower portion, which are horizontally displaced in the opposite directions along the wall surface of the building by vibration, and the web portion is displaced. It is characterized in that it is inclined with respect to a plane perpendicular or parallel to the direction in which it is made.

According to this configuration, since the web portion has an inclination in the direction of entering and exiting the wall surface, when subjected to a horizontal repeated load along the wall surface of the building due to an earthquake or the like, a bending deformation component is added to the shear deformation and stable. Energy absorption and great deformation capability.
This great deformability can be obtained without using low yield point steel as a material or processing the web part with slits or the like. In addition, when a low yield point steel is used or when a slit is provided in the web portion, a greater deformation capability can be obtained. Further, the shear strength / rigidity of the damper can be easily adjusted by adjusting the inclination angle, plate thickness, and width dimension of the web portion. In the case where a greater deformation capability is required, for example, an even greater deformation capability can be ensured by setting the inclination angle of the web portion with respect to the wall surface to 30 degrees or the like.

  In the damper of the present invention, the pair of vertical plate portions may be disposed horizontally and perpendicular to the wall surface, and the web portion may be inclined with respect to the wall surface. The pair of vertical plate portions do not necessarily have to be horizontal, but the web portion is inclined, and the pair of vertical plate portions, which are the mounting portions of the damper to the load-bearing wall, etc. The configuration for mounting on the load bearing wall or the like is not a special configuration, a simple configuration is sufficient, and the mounting workability is excellent.

  The damper of this invention WHEREIN: The said web part may differ in the inclination direction by the one part of a longitudinal direction, and another part. In the case of this configuration, since the web part is composed of a plurality of parts via the folded part or the like, the web part can be configured narrower than a single flat web part combining the parts of the plurality of faces. The damper is easy to fit within the thickness range of the bearing wall. Further, the length of the buckling surface can be shortened, and the buckling strength is also improved.

  Specific examples of the web portion having a plurality of portions with different inclination directions include, for example, a pair of parallel plate portions and the web portion forming an M-shape, and the web portions having different inclination directions. There are shapes such as corrugated parts. In addition, the web portion is connected between the pair of parallel plate portions and the intermediate plate portion arranged in parallel with the parallel plate portions, and the intermediate plate portion and the pair of parallel plate portions, respectively. It is good also as what consists of a sheet | seat inclination board part. When the web part is corrugated as described above, the total thickness can be made thinner with the same amount of steel.

  The damper of this invention WHEREIN: The said web part is good also as a structure which consists of one flat steel material. In this case, the damper has a simple shape such as a Z shape including the pair of parallel plate portions.

A damper according to the present invention is a damper attached to a building, and a pair of parallel plate portions arranged to face each other in parallel, and a plate-like web portion for energy absorption obtained by connecting the pair of parallel plate portions. A pair of vertical plate portions respectively connected between both ends of the pair of parallel plate portions, the pair of vertical plate portions being horizontally displaced in opposite directions along the wall surface of the building due to vibration. Since the web part is inclined with respect to a plane perpendicular or parallel to the direction of displacement, the normal part is used and stable without using a slit or the like. Energy absorption and great deformation capability are obtained.

(A) is the front view of the damper concerning one embodiment of this invention, (B) is the fracture side view, (C) is the perspective view. (A) is a front view of an example of a load bearing wall incorporating the damper, and (B) is a front view of another example. It is a graph which shows the yield strength test result of the damper. It is a side view of the damper concerning other embodiments of this invention. It is a graph which shows the yield strength test result of the damper. It is a side view of the damper concerning other embodiments of this invention. It is a graph which shows the yield strength test result of the damper. It is a side view of the damper concerning other embodiments of this invention. It is a graph which shows the yield strength test result of the damper. It is a side view of the damper concerning other embodiments of this invention. (A) is a side view of the damper which concerns on further another embodiment of this invention, (B) is a side view of the modification of the damper. It is a side view of the damper concerning other embodiments of this invention. It is a side view of the damper concerning other embodiments of this invention. (A) is a side view of the damper which concerns on other embodiment of this invention, (B) is explanatory drawing of the difference with a prior art example. It is explanatory drawing of the difference of the effect of the damper of this invention, and a prior art example. It is explanatory drawing of a prior art example. It is explanatory drawing of another prior art example.

  An embodiment of the present invention will be described with reference to FIGS. The damper 1 is a damper that is incorporated in a load-bearing wall 20 of a building as shown in FIG. 2 and absorbs energy applied by an earthquake or the like. The damper 1 is a pair of parallel plate portions 2 that are positioned vertically and arranged in parallel. , 2, an energy-absorbing plate-shaped web portion 3 connecting the parallel plate portions 2, and a pair of vertical plate portions 4, 4 connected between both ends of the pair of parallel plate portions 2, 2, respectively. Become. The pair of parallel plate portions 2 and 2 and the vertical plate portions 4 and 4 are made of a flat steel plate such as a strip steel, and the web portion 3 is made of a steel material described later. The parallel plate portions 2 and 2 and the web portion 3 and the parallel plate portions 2 and 2 and the vertical plate portions 4 and 4 are joined by welding such as fillet welding.

The pair of vertical plate portions 4 and 4 are respectively joined to an upper portion and a lower portion that are displaced in the opposite directions along the wall surface of the load bearing wall 20 due to vibration. For example, in the load-bearing wall 20 having the steel frame structure shown in FIG. 2 (A), the other end of the brace 24 whose one end is joined to the upper corner, which is the joint between the column 21 and the upper beam 22, is shown on the left side of the figure. The vertical plate portion 4 is joined, and the right vertical plate portion 4 is joined to the column 21.
Moreover, in the intermediate column type bearing wall 20 shown in FIG. 2B, the intermediate column 25 is divided into an upper column portion 25a and a lower column portion 25b, and the damper 1 is installed therebetween. In this example, the damper 1 has a posture different from that of the example of FIG. 2A by 90 °, and is disposed so that the vertical plate portions 4 and 4 are positioned above and below each other and become horizontal. The upper vertical plate portion 4 is joined to the lower end of the upper column portion 25a, and the lower vertical plate portion 4 is joined to the upper end of the lower column portion 25b. Here, the pair of parallel plate portions 2 and 2 are disposed perpendicular to the wall surface of the load bearing wall 20.
2A and 2B is a load-bearing wall of a detached house, for example, and includes a steel frame.

  The web portion 3 of the damper 1 is arranged such that the surface thereof is inclined in the direction of entering and exiting with respect to the wall surface of the load bearing wall 20. That is, in FIG. 1B, the top and bottom of the paper surface corresponds to the top and bottom of the load bearing wall 20, the width direction of the paper surface corresponds to the thickness direction of the load bearing wall 20 (the entrance / exit direction), and the wall surface of the load bearing wall 20 corresponds to the paper surface. It is perpendicular to it. Here, a part of the web part 3 in the longitudinal direction is inclined at a predetermined angle with respect to the wall surface of the load bearing wall 20, and the other part of the web part 3 in the longitudinal direction is different from the inclination angle with respect to the wall surface. The cross section is mountain-shaped so as to form an inclination of. In order to make the web portion 3 have a mountain-shaped cross section, in this embodiment, the web portion 3 is configured by joining two flat steel plates 13A and 13B such as band steels by welding such as fillet welding. Thereby, the whole cross section of the damper 1 is M-shaped. That is, the steel plate 13A that is the upper portion of the web portion 3 is inclined downward with respect to the wall surface, and the steel plate 13B that is the lower portion of the web portion 3 is inclined upward with respect to the wall surface.

Actions and effects will be described. The vertical plate portion 4 transmits the load of the steel plates 13A and 13B of the web portion 3. As shown in front and side views in FIGS. 15C and 15D, when the web portion 43 of the shear panel damper 41 is rotated with respect to the shear axis, that is, inclined in the direction of entering and exiting the wall surface, the rigidity is increased. Is lower as the inclination of the web portion 43 is larger, but the deformation capability is considered to be higher.
According to the damper 1 of the above embodiment, the web portion 3 is inclined in the entrance / exit direction with respect to the wall surface of the load bearing wall 20, so that a high deformability is obtained. Therefore, when using a low-yield-point steel as a material or applying a horizontal load along the wall of the load-bearing wall 20 due to an earthquake or the like without applying a slit or the like to the web portion 3, sufficient deformation capacity is secured. can do. In FIG. 3, the yield strength test result of this damper 1 is shown with the graph.

  The shear strength / rigidity of the damper 1 can be easily adjusted by adjusting the inclination angle, the plate thickness, and the width dimension of the web portion 3. Moreover, in this embodiment, since the web part 3 is made into the mountain-shaped cross-sectional shape, and the surface is comprised in multiple surfaces, the web part 3 is made into one flat plate shape with the width in which the two steel plates 13A and 13B are arranged. Compared to the case, the thickness of the load bearing wall 20 in the wall thickness direction is reduced, and the damper 1 is easily contained within the thickness range of the load bearing wall 20. Further, since the length of the buckling surface can be shortened, the buckling strength is also improved.

  In addition, when big deformation performance is calculated | required, larger deformation performance can be ensured by setting the inclination angle with respect to the wall surface of the surface of the said web part 3 to 30 degree | times etc. If necessary, the web part 3 may be provided with cross-sectional defects such as holes and slits to adjust the shear strength and rigidity. As the material of the web part 3, a low yield point steel or an extremely low yield point steel may be used. It may be used to further increase the deformation capability.

  FIG. 4 shows a side view of a damper according to another embodiment of the present invention. In this damper 1, a pair of parallel plate portions 2, 2 and a web portion 3 having a cross-sectional mountain shape are integrally formed by bending a single flat steel plate into an M-shaped cross section. The portion where the pair of parallel plate portions 2 and 2 and the web portion 3 continue is bent in two steps. In the case of this embodiment, only bending work is required and welding is not required, so that it is excellent in productivity and can be manufactured at low cost. Other configurations and operational effects are the same as those of the embodiment shown in FIGS. In FIG. 5, the yield strength test result of this damper 1 is shown with the graph.

  FIG. 6 shows a side view of a damper according to still another embodiment of the present invention. In this damper 1, in the embodiment shown in FIGS. 1-3, the said web part 3 consists of one angle steel 13C, and, thereby, the cross section of the damper 1 whole is M-shaped. In the case of this embodiment, since the angle steel 13C is used for the web part 3, it is excellent in productivity compared with the case where two steel plates are welded. Other configurations and operational effects are the same as those of the embodiment shown in FIGS. In FIG. 7, the yield strength test result of this damper 1 is shown with the graph.

  FIG. 8 shows a side view of a damper according to still another embodiment of the present invention. In the damper 1, in the embodiment shown in FIGS. 1 to 3, the web portion 3 has a corrugated cross section formed by joining two angle steels 13 </ b> D and 13 </ b> E by welding or the like. With the waveform as described above, the overall thickness can be further reduced while increasing the inclination angle of the inclined plate portion of the web portion 3. In FIG. 9, the yield strength test result of this damper 1 is shown with the graph.

  FIG. 10 shows a side view of a damper according to still another embodiment of the present invention. In the damper 1, in the embodiment shown in FIGS. 1 to 3, the web portion 3 is made of a single flat plate-shaped steel plate. Other configurations and operational effects are substantially the same as those of the embodiment shown in FIGS.

  FIG. 11 shows a side view of a damper according to still another embodiment of the present invention. In the damper 1, in the embodiment shown in FIGS. 1 to 3, the web portion 3 includes an intermediate plate portion 13 </ b> F disposed in parallel with the parallel plate portion 2 between the pair of parallel plate portions 2 and 2. The intermediate plate portion 13F and the pair of parallel plate portions 2 and 2 are disposed in an inclined posture with respect to the parallel plate portion 2 between the intermediate plate portion 13F and the pair of parallel plate portions 2 and 2. The two inclined plate portions 13G. 13H. In this case, the inclined plate portions 13G and 13H are inclined with respect to the wall surface. In the configuration example of FIG. 11A, both inclined plate portions 13G and 13H are inclined at an angle in the same direction. In the configuration example of FIG. 11B, both inclined plate portions 13G and 13H are opposite to each other. Inclined at the same inclination angle (the same absolute angle). Other configurations and operational effects are the same as those of the embodiment shown in FIGS.

  FIG. 12 shows a side view of a damper according to still another embodiment of the present invention. In this damper 1, in the embodiment shown in FIGS. 1-3, the said web part 3 consists of one corrugated sheet steel. In the case of this configuration, the total thickness can be further reduced with the same amount of steel while the number of the web portions 3 is one.

  FIG. 13 shows a side view of a damper according to still another embodiment of the present invention. In the damper 1, in the embodiment shown in FIGS. 1 to 3, the web portion 3 has a mountain-shaped cross section formed by joining two plate members 13 </ b> I and 13 </ b> J bent into a L-shaped cross section by welding or the like. is there. Other configurations and operational effects are the same as those of the embodiment shown in FIGS.

FIG. 14A shows a side view of a damper according to still another embodiment of the present invention. As shown in the figure, the damper 1 has an H-shaped steel arranged such that the web portion is inclined with respect to the wall surface, and the upper and lower flange portions of the H-shaped steel are a pair of parallel plate portions of the damper 1. The web portion of the H-shaped steel is the web portion 3 of the damper 1. In this case, the pair of upper and lower parallel plate portions 2 and 2 are not perpendicular to the wall surface and are inclined together.
Even if it is the same H-section steel, when the web portion is arranged so as to be parallel to the wall surface as shown in FIG. 14 (B), the deformation capability becomes small as described with reference to FIG. Deformation performance can be increased by inclining the web portion with respect to the wall surface as in the embodiment. That is, also in the case of this embodiment, it is possible to obtain substantially the same operational effects as in the case of the embodiment shown in FIGS.

  In each of the above embodiments, the case where the damper 1 is incorporated in the bearing wall has been described. However, as a reference example, the damper 1 of the above embodiment may be used as a damping damper such as a coupling damping material or a stud damping. it can.

DESCRIPTION OF SYMBOLS 1 ... Damper 2 ... Parallel plate part 3 ... Web part 4 ... Vertical plate part 13A, 13B ... Steel plate 13C, 13D, 13E ... Yamagata steel 13F ... Intermediate plate part 13G, 13H ... Inclined plate part 13I, 13J ... Plate material 20 ... Strength wall

Claims (7)

A damper attached to a building,
A pair of parallel plate portions arranged to face each other in parallel, a plate-like web portion for energy absorption obtained by connecting the pair of parallel plate portions, and a pair connected between both ends of the pair of parallel plate portions, respectively. And the pair of vertical plates are joined to an upper portion and a lower portion, which are horizontally displaced in the opposite directions along the wall surface of the building by vibration, and the web portion is displaced. A damper characterized in that it is inclined with respect to a plane perpendicular or parallel to the direction in which it is made.   2. The damper according to claim 1, wherein the pair of vertical plate portions are disposed horizontally and perpendicular to the wall surface, and the web portion is inclined with respect to the wall surface.   The damper of Claim 1 or Claim 2 WHEREIN: The damper from which the said web part differs in the inclination direction in the one part and other part of a longitudinal direction.   4. The damper according to claim 3, wherein the pair of parallel plate portions and the web portion form an M shape.   4. The damper according to claim 3, wherein the web portion has a waveform in which portions having different inclination directions are alternately arranged.   4. The damper according to claim 3, wherein the web portion is an intermediate plate portion disposed in parallel with the parallel plate portions between the pair of parallel plate portions, the intermediate plate portion, and the pair of parallel plate portions. A damper composed of two inclined plate portions connected to each other.   The damper of Claim 1 or Claim 2 WHEREIN: The said web part is a damper which consists of one sheet-like steel material.

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