JP7377753B2 - Vibration damping device - Google Patents

Description

The present invention relates to a vibration damping device.

Vibration damping devices for buildings suppress vibrations by absorbing vibration energy using various methods. For example, in Patent Documents 1 and 2, a plate material of low yield point steel (hereinafter sometimes referred to as a low yield point steel plate) is used, and the shear force generated by vibration causes the plate material to plastically deform, thereby absorbing vibration energy. A vibration damping device is disclosed.

Patent No. 3397220 Japanese Patent Application Publication No. 2001-234974

Both vibration damping devices include a low-yield steel plate and a structure for holding it, but it is desired to develop a holding structure to more efficiently absorb vibration energy in the low-yield steel plate. There is.

One of the objects of the present invention is to provide a plate holding structure for efficiently absorbing vibration energy.

According to an embodiment of the present invention, the first plate portion includes a deformation region, a first holding region provided at one end of the deformation region, and a second holding region provided at the other end of the deformation region. a first plate portion in which the first holding region and the second holding region have a lower yield shear force than the deformation region; and a second plate portion disposed on a first surface side of the first plate portion. a plate portion, a first fixing portion rotatably fixing the second plate portion to the first plate portion in the first holding area; A vibration damping device is provided that includes a second fixing part that is rotatably fixed to the first plate part.

The first fixing part further includes a third plate part disposed on a second surface side opposite to the first surface side of the first plate part, and the first fixing part is arranged in the first holding area. and the third plate part are fixed to the first plate part in a rotatable state, and the second fixing part is fixed to the second plate part and the third plate part in the second holding area. may be rotatably fixed to the first plate portion.

A plurality of the second plate parts may be arranged on the first surface side of the first plate part.

According to an embodiment of the present invention, the first plate portion includes a deformation region, a first holding region provided at one end of the deformation region, and a second holding region provided at the other end of the deformation region. The first holding region and the second holding region are arranged on a first plate portion having a lower yield shear force than the deformation region, and on a first surface side of the first plate portion, and are arranged in one direction. a first fixing part that fixes the second plate to the first plate in the first holding area; and a first fixing part that fixes the second plate to the first plate in the first holding area; and a second fixing part fixed to the first plate part.

The first fixing part further includes a third plate part that is disposed on a second surface side opposite to the first surface side of the first plate part and includes a slit extending in one direction, and the first fixing part is arranged in the first holding area. The second plate part and the third plate part are fixed to the first plate part, and the second fixing part is fixed to the second plate part and the third plate part in the second holding area. may be fixed to the first plate portion.

The slit may extend along a first direction connecting the first fixing part and the second fixing part.

The first holding area is capable of fixing the first plate part to a building structure on a first area where the first fixing part is arranged and on a side opposite to the deformation area with respect to the first area. a second region covered with a splice plate, the second holding region includes a third region in which the second fixing part is arranged, and a third region in which the second fixing portion is disposed, and A fourth region covered by a splice plate capable of fixing the one plate portion to the building structure may be included.

The first holding area and the second holding area may have a larger cross-sectional area on a plane normal to a first direction connecting the first fixing part and the second fixing part, than the deformation area. .

The cross-sectional area of the deformation region may gradually change on the first holding region side.

The apparatus may further include an auxiliary plate disposed between the second plate part and the first plate part.

The second plate portion may include a rib protruding from a surface opposite to the first plate portion.

The rib may be arranged to extend in a second direction perpendicular to a first direction connecting the first fixing part and the second fixing part.

According to the present invention, it is possible to provide a plate holding structure for efficiently absorbing vibration energy.

It is a figure showing an example of arrangement of a damping device in a 1st embodiment of the present invention. 1 is a diagram for explaining the structure of a vibration damping device according to a first embodiment of the present invention. FIG. FIG. 3 is a schematic diagram for explaining a cross section taken along the line A1-A2 in FIG. 2. FIG. It is a figure showing movement of a damping device in a 1st embodiment of the present invention. It is a figure for explaining the structure of the damping device in a 2nd embodiment of the present invention. It is a figure for explaining the structure of the damping device in a 3rd embodiment of the present invention. It is a figure for explaining the structure of the damping device in a 4th embodiment of the present invention. It is a figure for explaining the structure of the damping device in a 5th embodiment of the present invention. It is a figure for explaining the structure of the damping device in a 6th embodiment of the present invention. 10 is a schematic diagram for explaining a cross section taken along the B1-B2 cutting line in FIG. 9. FIG. It is a figure for explaining the structure of the damping device in a 7th embodiment of the present invention. It is a figure for explaining the structure of the damping device in an 8th embodiment of the present invention. 13 is a schematic diagram for explaining a cross section taken along the C1-C2 cutting line in FIG. 12. FIG. It is a figure which shows the movement of the damping device in 8th Embodiment of this invention. It is a figure for explaining the structure of the damping device in a 9th embodiment of the present invention. 16 is a schematic diagram for explaining a cross section taken along the D1-D2 cutting line in FIG. 15. FIG. It is a figure for explaining the structure of the damping device in a 10th embodiment of the present invention. It is a figure for explaining the structure of the damping device in an 11th embodiment of the present invention. 19 is a schematic diagram for explaining a cross section taken along the E1-E2 cutting line in FIG. 18. FIG.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. The embodiments shown below are examples of the embodiments of the present invention, and the present invention is not construed as being limited to these embodiments. In the drawings referred to in this embodiment, the same parts or parts having similar functions are denoted by the same or similar symbols (codes with A, B, etc. after the number), and their repetitions are indicated. The explanation may be omitted.

<First embodiment>
[overview]
FIG. 1 is a diagram showing an example of the arrangement of vibration damping devices in the first embodiment of the present invention. The vibration damping device 1 in the first embodiment includes a holding structure of a low yield point steel plate 10 (first plate part) for efficiently absorbing vibration energy, and is divided into upper and lower parts forming the structure of a building. It is arranged between the studs 90u and 90b. In this example, stud 90u is an H-beam and includes a web 95u and flanges 92u, 94u connected to both ends of web 95u. Stud 90b is an H-beam and includes a web 95b and flanges 92b, 94b connected to both ends of web 95b. The studs 90u and 90b are arranged such that their longitudinal directions extend along the vertical direction. The low yield point steel plate 10 is an example of a plate material that serves as a damper for absorbing vibration energy, and as described below, it can be made of various materials such as alloys and steels as long as it has a yield shear force lower than that of the web 95. Structure and materials can be changed.

Hereinafter, for convenience of explanation, the x, y, and z axes will be defined as spatial directions as follows. The x-axis direction (first direction) corresponds to the longitudinal direction of the studs 90u and 90b in the in-plane direction of the web 95, that is, the direction in which the flanges 92u, 94u, 92b, and 94b extend, and in this example, corresponds to the vertical direction. It is. The y-axis direction (second direction) corresponds to the direction perpendicular to the x-direction among the in-plane directions of the webs 95u and 95b. The z-axis direction (third direction) corresponds to the direction perpendicular to the x-axis direction and the y-axis direction, that is, the normal direction of the webs 95u and 95b. Note that the x-axis direction, y-axis direction, and z-axis direction all mean directions along the axis, and do not indicate the positive direction (the direction of the arrow in the illustration), but the positive and negative directions. Both shall be shown. That is, the x-axis direction means the vertical direction in FIG.

The vibration damping device 1 includes a low yield point steel plate 10 and a restraint section 20. The low yield point steel plate 10 is a plate-shaped member including a surface extending in the x-axis direction and the y-axis direction, and is arranged between the webs 95u and 95b so as to be spaced apart from the webs 95u and 95b. The upper fixing part 70 is connected to the upper end of the low yield point steel plate 10 and the web 95u. The lower fixing portion 75 is connected to the lower end of the low yield point steel plate 10 and the web 95b. Both the upper fixing part 70 and the lower fixing part 75 fix the position of the low yield point steel plate 10 with respect to the webs 95u and 95b. As a result, the low yield point steel plate 10 is held by the webs 95u and 95b.

The restraint part 20 is configured to sandwich the low yield point steel plate 10 between two plates, and thereby limit the deformation of the low yield strength steel plate 10 in the z-axis direction. It is fixed to the yield point steel plate 10. At this time, the first fixing part 40 fixes the restraint part 20 to the low yield point steel plate 10 in a rotatable state in the xy plane. The second fixing part 50 fixes the restraint part 20 to the low yield point steel plate 10 in a rotatable state in the xy plane. In other words, the low yield point steel plate 10 is in a state in which buckling (deformation in the z-axis direction) of the low yield point steel plate 10 is restricted, and deformation in the in-plane direction (xy in-plane direction) is prevented. It is sandwiched between the restraining parts 20 in a state where it is not in use.

When a building vibrates due to an earthquake or the like, the vibration is transmitted to the vibration damping device 1 via the studs 90u and 90b. Vibration energy is absorbed by plastically deforming the low yield point steel plate 10 in the vibration damping device 1 in the xy plane direction due to shear force. At this time, the deformation of the low yield point steel plate 10 in the z-axis direction is restricted by the restraining portion 20 . In this way, vibrations in the building are suppressed. Next, the detailed structure of the vibration damping device 1 will be explained.

[Configuration of vibration damping device]
FIG. 2 is a diagram for explaining the structure of the vibration damping device according to the first embodiment of the present invention. FIG. 3 is a schematic diagram for explaining a cross section taken along the line A1-A2 in FIG. As described above, the vibration damping device 1 includes the low yield point steel plate 10 spaced apart from the webs 95u and 95b.

The low yield point steel plate 10 is a steel plate having a lower yield shear force than the webs 95u and 95b. The low yield point steel plate 10 includes an upper holding area 10u (first holding area) and a lower holding area 10b (second holding area) as regions at both ends in the x-axis direction, and has an upper holding area 10u and a lower holding area 10b. It includes a deformation area of 10 m located between. That is, an upper holding area 10u is provided at one end of the deformation area 10m, and a lower holding area 10b is provided at the other end. Both the upper holding area 10u and the lower holding area 10b are rectangular areas and have a longitudinal direction in the y-axis direction. The deformation area 10m is a rectangular area and is close to a square with approximately equal lengths in the x-axis direction and the y-axis direction, but may have a longer length in either the x-axis direction or the y-axis direction. In this example, the upper holding area 10u and the lower holding area 10b are longer than the deformation area 10m in the y-axis direction. Therefore, the upper holding region 10u and the lower holding region 10b have a higher yield shear force than the deformation region 10m.

Here, the yield shear force shown in this specification will be briefly explained. The yield shear force in the y-axis direction is proportional to the cross-sectional area A of a plane whose normal direction is the x-axis direction (a plane including the y-axis and the z-axis). Further, the product of this cross-sectional area A and the degree of shear stress (yield point) τ becomes the yield shear force Q. Therefore, in a situation where the degree of shear stress τ does not change, the smaller the cross-sectional area A, the smaller the yield shear force Q becomes. When the length of the low yield point steel plate 10 in the y-axis direction is D, and the length (corresponding to thickness) in the z-axis direction is t, A is expressed as the product of D and t.

In this example, the cross-sectional area A1 of the deformation region 10m is smaller than the cross-sectional area A2 of the upper holding region 10u, even considering the region through which a high-strength bolt 74 (described later) passes. The lower holding area 10b is also similar to the upper holding area 10u. Therefore, the deformation region 10m has a lower yield shear force than the upper holding region 10u and the lower holding region 10b.

The upper holding area 10u includes an upper first connection area 101u (second area) and a lower second connection area 102u (first area). The first connection area 101u and the web 95u located above the upper holding area 10u are connected via the upper fixing part 70. The upper fixing part 70 includes splice plates 71, 72 and high strength bolts 73, 74. The upper holding area 10u and the web 95u are sandwiched between and covered by the splice plate 71 and the splice plate 72. The splice plates 71, 72 have a higher yield shear force than the deformation area 10m so that they do not yield before the deformation area 10m. High strength bolts 73 pass through splice plates 71, 72 and web 95u to secure these configurations together. High strength bolts 74 pass through splice plates 71, 72 and upper retention area 10u to secure these configurations together. Since the upper holding region 10u has a higher yield shear force than the deforming region 10m, it is less likely to yield than the deforming region 10m, and the upper fixing portion 70 enables stable fixation. Although the splice plates 71 and 72 partially cover the upper holding area 10u in the y-axis direction, they may cover the entirety.

The lower holding area 10b includes a lower first connection area 101b (fourth area) and an upper second connection area 102b (third area). The first connection area 101b and the web 95b located below the lower holding area 10b are connected via the lower fixing part 75. The lower fixing part 75 includes splice plates 76, 77 and high strength bolts 78, 79. Lower holding area 10b and web 95b are sandwiched between and covered by splice plate 76 and splice plate 77. The splice plates 76, 77 have a yield shear force that is at least higher than the deformation area 10m so that they do not yield before the deformation area 10m. High strength bolts 78 pass through splice plates 76, 77 and web 95b to secure these configurations together. High strength bolts 79 pass through splice plates 76, 77 and lower retention area 10b to secure these configurations together. Since the lower holding region 10b has a higher yield shear force than the deformation region 10m, it is less likely to yield than the deformation region 10m, and the lower fixing portion 75 enables stable fixation. Although the splice plates 76 and 77 partially cover the lower holding area 10b in the y-axis direction, they may cover the entirety.

The restraint section 20 includes a first restraint plate 21 (second plate part) and a second restraint plate 22 (third plate part). The first restraining plate 21 and the second restraining plate 22 are both rectangular steel plates. It is preferable that the first restraint plate 21 and the second restraint plate 22 have higher rigidity against out-of-plane deformation than the deformation region 10m of the low yield point steel plate 10. The first restraint plate 21 and the second restraint plate 22 are fixed to the low yield point steel plate 10 by the first fixing part 40 and the second fixing part 50. At this time, the first restraining plate 21 and the second restraining plate 22 are rotatably fixed to the low yield point steel plate 10 by the first fixing part 40. Further, the first restraint plate 21 and the second restraint plate 22 are rotatably fixed to the low yield point steel plate 10 by a second fixing part 50.

The first fixing part 40 has a fixing member 45 such as a bolt. The fixture 45 penetrates the first restraint plate 21, the second restraint plate 22, and the upper holding area 10u (more specifically, the second connection area 102u) sandwiched therebetween, and connects these structures to each other in the xy plane. Fix it so that it can rotate inside. The center of this rotation corresponds to the position of the fixture 45. The second fixing part 50 has a fixing member 55 such as a bolt. The fixture 55 penetrates the first restraint plate 21, the second restraint plate 22, and the lower holding area 10b (more specifically, the second connection area 102b) sandwiched therebetween, and connects these structures to each other in the xy plane. Fix it so that it can rotate inside. The center of this rotation corresponds to the position of the fixture 55.

[Movement of vibration damping device]
Next, the movement of the vibration damping device 1 when vibration is transmitted to the studs 90u and 90b will be explained.

FIG. 4 is a diagram showing the movement of the vibration damping device in the first embodiment of the present invention. The example shown in FIG. 5 shows the movement of the vibration damping device 1 when vibration in the y-axis direction occurs in the studs 90u and 90b. As shown in FIG. 5, when the studs 90u and 90b vibrate in the y-axis direction, in-plane plastic deformation occurs in the low yield point steel plate 10, thereby absorbing vibration energy.

The low yield point steel plate 10 has both ends in the x-axis direction fixed, while both ends in the y-axis direction are not fixed. Therefore, the low yield point steel plate 10 can efficiently use shear force due to vibration in the y-axis direction for plastic deformation. Plastic deformation occurs more in the deformation region 10m than in the upper holding region 10u and the lower holding region 10b. On the other hand, since the movement of the deformation region 10m in the z-axis direction is suppressed by the restraining portion 20, there is little influence on the in-plane plastic deformation of the deformation region 10m. In this way, the low yield point steel plate 10 can efficiently use shear force for plastic deformation and absorb vibration energy while deformation (buckling) in the out-of-plane direction is suppressed.

More specifically, in this example, the restraint part 20 is fixed to each of the upper holding area 10u and the lower holding area 10b in a state that it can rotate within the plane. Therefore, even if distortion occurs in the positional relationship between the first fixing part 40 and the second fixing part 50 due to the vibration of the studs 90u and 90b, the restraining part 20 remains almost independent of the plastic deformation in the deformation area 10m. Rotates and follows in response to distortions in positional relationships. As a result, the restraint part 20 suppresses deformation (buckling) of the low yield point steel plate 10 in the out-of-plane direction without generating a large load on the first fixing part 40 and the second fixing part 50.

<Second Embodiment to Fifth Embodiment>
Although the low yield point steel plate 10 and the restraining portion 20 (first restraining plate 21, second restraining plate 22) in the first embodiment are both rectangular steel plates, they are not limited to the rectangular shape. Hereinafter, various shapes will be illustrated as the second to fifth embodiments.

FIG. 5 is a diagram for explaining the structure of a vibration damping device according to the second embodiment of the present invention. A vibration damping device 1A in the second embodiment includes a low yield steel plate 10A having a shape different from that of the low yield steel plate 10. The deformation region 10m in the low yield point steel plate 10A is a region where the length in the y-axis direction gradually changes as it moves in the x-axis direction at the boundary portion with the upper holding region 10u and the boundary portion with the lower holding region 10b. 10c. In other words, the cross-sectional area A (the cross-sectional area of the plane whose normal direction is the x-axis direction) in the region 10c gradually decreases from the cross-sectional area A2 of the upper holding region 10u described above to the cross-sectional area A1 of the deformation region 10m, It can also be said that the deformation region 10m has a region in which the cross-sectional area (the cross-sectional area of the plane normal to the first direction) gradually changes on the upper holding region 10u side. The same holds true for the relationship between the cross-sectional area of the lower holding region 10b and the cross-sectional area A1. In this way, in the low yield point steel plate 10A, the area where stress is concentrated can be reduced more than in the low yield point steel plate 10.

FIG. 6 is a diagram for explaining the structure of a vibration damping device in a third embodiment of the present invention. The vibration damping device 1B in the third embodiment includes a low yield point steel plate 10B having a shape different from the low yield point steel plate 10 in the first embodiment. The deformation region 10mB in the low yield point steel plate 10B gradually decreases in length in the y-axis direction from both the upper holding region 10u and the lower holding region 10b toward the center in the x-axis direction. It has a shape where the length of is minimal. In other words, the cross-sectional area A1 of the deformation region 10mB gradually decreases from the cross-sectional area A2 of the upper holding region 10u toward the center in the x-axis direction, and the deformation region 10mB has a cross-sectional area ( It can also be said to have a region in which the cross-sectional area of the plane with the first direction as the normal line gradually changes. The same holds true for the relationship between the cross-sectional area of the lower holding region 10b and the cross-sectional area A1. In this example, the deformation area 10 mB has a curved shape (for example, a circular arc shape) as edge shapes CB1 and CB2 at both ends in the y-axis direction. In this way, in the low yield point steel plate 10B, the area where stress is concentrated can be reduced more than in the low yield point steel plate 10. Further, the central portion in the x-axis direction has a shorter length in the y-axis direction than the other portions, so that the yield shear force is smaller, so it becomes a region that is easily deformed. Therefore, as in this example, by arranging the restraining plate at least in the central portion of the deformation area 10 mB in the x-axis direction, the deformation (buckling) in the out-of-plane direction of the deformation area 10 mB is efficiently suppressed. can do.

FIG. 7 is a diagram for explaining the structure of a vibration damping device according to a fourth embodiment of the present invention. A vibration damping device 1C in the fourth embodiment includes a low yield point steel plate 10C having a shape different from the low yield point steel plate 10 in the first embodiment. The deformation region 10mC in the low yield point steel plate 10C gradually decreases in length in the y-axis direction from both the upper holding region 10u and the lower holding region 10b toward the center in the x-axis direction. It has a shape in which the length of is minimal. In other words, the cross-sectional area A1 of the deformation region 10mC gradually becomes smaller from the cross-sectional area A2 of the upper holding region 10u toward the center in the x-axis direction, and the deformation region 10mC has a cross-sectional area ( It can also be said to have a region in which the cross-sectional area of the plane with the first direction as the normal line gradually changes. The same holds true for the relationship between the cross-sectional area of the lower holding region 10b and the cross-sectional area A1. In this example, the deformation region 10mC has a shape that is a combination of two straight lines as edge shapes CC1 and CC2 at both ends in the y-axis direction. In this way, in the low yield point steel plate 10C, the area where stress is concentrated can be reduced more than in the low yield point steel plate 10. Further, the central portion in the x-axis direction has a shorter length in the y-axis direction than the other portions, so that the yield shear force is smaller, so it becomes a region that is easily deformed. Therefore, as in this example, by arranging the restraining plate at least in the central portion of the deformation area 10mC in the x-axis direction, the deformation (buckling) in the out-of-plane direction of the deformation area 10mC is efficiently suppressed. can do.

FIG. 8 is a diagram for explaining the structure of a vibration damping device in a fifth embodiment of the present invention. The vibration damping device 1D in the fifth embodiment includes a restraint part 20D having a shape different from the restraint part 20 in the third embodiment. The first restraining plate 21D in the restraining portion 20D gradually increases in length in the y-axis direction from both ends in the x-axis direction toward the central portion in the x-axis direction, and reaches a maximum length in the y-axis direction at the central portion. It has a shape. In this example, the first restraining plate 21D has a curved shape (for example, a circular arc shape) as an edge shape CD1 in the y-axis direction in a portion that covers the deformation region 10 mB. A second restraint plate 22D (not shown) corresponding to the first restraint plate 21D also has the same shape as the first restraint plate 21D.

In this example, the edge shape CD1 has a shape that is approximately symmetrical to the edge shape CB1 of the deformation area 10 mB with respect to the x axis, but it may have a different shape. As described above, the deformation region 10 mB is easily deformed at the central portion in the x-axis direction. Therefore, as shown in FIG. 8, the edge shape CD1 and the edge shape CB1 have a short distance at the center in the x-axis direction, so that the deformation region 10m is deformed (seated) in the out-of-plane direction (z-axis direction). It is possible to effectively suppress the occurrence of

Note that the edge shapes CD1 and CD2 are not limited to these shapes, but can take various shapes. For example, the first restraining plate 21D may have a shape in which two straight lines are combined as the edge shape in the y-axis direction, like the outer edge shape CC1 of the deformation region 10mC in the fourth embodiment. Here, when providing ribs as described in the sixth embodiment described later, in a region where the width is longer than other portions, particularly in a region where the width of the first restraining plate 21D increases rapidly, along the x-axis direction. It is more effective to arrange ribs. In this example, it is more effective to arrange a rib along the x-axis direction in the central portion of the first restraint plate 21D in the x-axis direction.

<Sixth embodiment>
The restraining portion 20 in the first embodiment may have a stiffening structure to more efficiently suppress movement of the deformation region 10m in the low yield point steel plate 10 in the out-of-plane direction. Although various structures can be used as the stiffening structure, in the sixth embodiment, an example in which ribs are used as the stiffening structure will be described.

FIG. 9 is a diagram for explaining the structure of a vibration damping device in a sixth embodiment of the present invention. FIG. 10 is a schematic diagram for explaining a cross section taken along the line B1-B2 in FIG. 11. A vibration damping device 1E in the sixth embodiment includes a restraint section 20E in which a stiffening structure is provided in the restraint section 20 in the first embodiment.

The restraint section 20E includes a first restraint plate 21, a second restraint plate 22, a first rib 25, and a second rib 26. The first rib 25 is a plate-like member that protrudes from the surface of the first restraint plate 21 opposite to the deformation region 10m. The first rib 25 has a surface substantially perpendicular to the first restraint plate 21 and has a longitudinal direction in the y-axis direction when viewed along the z-axis direction. In this example, two first ribs 25 are provided on the first restraining plate 21. Only one first rib 25 may be provided for the first restraint plate 21, or more first ribs 25 may be provided. Further, the shape of the first rib 25 is not limited to having a long length along the y-axis direction when viewed along the z-axis direction, but may have a long length along other directions, or may have a long length along the y-axis direction when viewed along the z-axis direction. It may have a curved shape. That is, the first rib 25 is not limited to a plate shape with a flat surface, but may be a plate shape with a curved surface. Furthermore, the first rib 25 may have a structure in which surfaces in a plurality of directions intersect, such as a lattice shape. The relationship between the second restraint plate 22 and the second rib 26 is also the same as the relationship between the first restraint plate 21 and the first rib 25, so the explanation of that relationship will be omitted.

In this way, by using stiffening members such as ribs, the rigidity of the first restraint plate 21 and the second restraint plate 22 is increased, so that the deformation in the out-of-plane direction of the deformation region 10m of the low yield point steel plate 10 ( buckling) can be more strongly suppressed.

<Seventh embodiment>
In the first embodiment, one restraint part 20 was provided for one low yield point steel plate 10, but a plurality of restraint parts may be provided. In the seventh embodiment, a vibration damping device 1F in which two restraining portions 20aF and 20bF are provided for one low yield point steel plate 10 will be described.

FIG. 11 is a diagram for explaining the structure of a vibration damping device in a seventh embodiment of the present invention. The vibration damping device 1F in the seventh embodiment includes a restraint part 20aF and a restraint part 20bF. Both the restraint part 20aF and the restraint part 20bF have a configuration corresponding to a set of a first restraint plate 21 and a second restraint plate 22, similarly to the restraint part 20 in the first embodiment, and each has a length in the y-axis direction. They differ in that they are shorter.

That is, the first restraint plate 21aF (and the second restraint plate 22aF, not shown) in the restraint part 20aF is rotatable with respect to the low yield point steel plate 10 (upper holding area 10u) by the first fixing part 40aF (fixture 45aF). It is fixed in a fixed state. The first restraint plate 21bF (and the unillustrated second restraint plate 22bF) in the restraint part 20bF is rotatable with respect to the low yield point steel plate 10 (upper holding area 10u) by the first fixing part 40bF (fixture 45bF). is fixed. The first restraint plate 21bF (and the unillustrated second restraint plate 22bF) in the restraint part 20bF is rotatable with respect to the low yield point steel plate 10 (upper holding area 10u) by the first fixing part 40bF (fixture 45bF). is fixed. The first restraint plate 21bF (and the second restraint plate 22bF, not shown) in the restraint part 20bF is in a state where it can rotate with respect to the low yield point steel plate 10 (lower holding area 10b) by the first fixing part 40bF (fixture 45bF). is fixed.

On the other hand, the restraint part 20 was arranged at the central part (1/2 part) in the y-axis direction of the deformation region 10m, but the restraint part 20aF and the restraint part 20bF are arranged in the 1/2 part in the y-axis direction of the deformation region 10m. It is arranged in the 4th part and the 3/4th part. Note that the restraining portion 20aF and the restraining portion 20bF are not limited to such an arrangement, and may be arranged so as to equally divide the deformation region 10m in the y-axis direction. For example, the restraining portion 20aF and the restraining portion 20bF may be moved closer to the center in the y-axis direction to enhance the effect of suppressing deformation (buckling) in the out-of-plane direction at the center of the deformation region 10m.

<Eighth embodiment>
In the first embodiment, the restraint part 20 was rotatably fixed to the low yield point steel plate 10, but by changing the structure of the plate member, it can be rotated with respect to the low yield point steel plate 10. It may be fixed in a state other than that. In the eighth embodiment, a structure of a restraining portion that may be fixed to the low yield point steel plate 10 in a double-sided structure and not rotatable will be described.

FIG. 12 is a diagram for explaining the structure of a vibration damping device according to the eighth embodiment of the present invention. FIG. 13 is a schematic diagram for explaining a cross section taken along the C1-C2 cutting line in FIG. 12. A vibration damping device 1G in the eighth embodiment includes a restraining portion 20G. The restraint part 20G is fixed to the low yield point steel plate 10 by a first fixing part 40G and a second fixing part 50G.

The restraint section 20G includes a first restraint plate 21G and a second restraint plate 22G. The first restraint plate 21G is formed with a plurality of slits 28G having a longitudinal direction in the x-axis direction. The second restraint plate 22G is formed with a plurality of slits 29G having a longitudinal direction in the x-axis direction. The first restraint plate 21G and the second restraint plate 22G have a structure in which a plurality of plate-like members each having a narrow width and a length in the x-axis direction are connected at their ends by forming slits.

The first fixing part 40G has a fixing member 45G such as a high-strength bolt. The fixture 45G passes through the first restraining plate 21G, the second restraining plate 22G, and the upper holding region 10u of the low yield point steel plate 10 sandwiched therebetween, and fixes these structures to each other. The second fixing part 50G has a fixing member 55G such as a high-strength bolt. The fixture 55G passes through the first restraining plate 21G, the second restraining plate 22G, and the lower holding region 10b of the low yield point steel plate 10 sandwiched therebetween, and fixes these structures to each other.

Next, the movement of the vibration damping device 1G when vibration is transmitted to the studs 90u and 90b will be explained.

FIG. 14 is a diagram showing the movement of the vibration damping device in the eighth embodiment of the present invention. FIG. 14 corresponds to FIG. 4 described in the first embodiment. As described above, the first restraint plate 21G and the second restraint plate 22G have a structure in which a plurality of narrow plate members are connected by slits 28G and 29G. This narrow plate-like member has a structure that is easily deformed in the xy plane near both end portions thereof (both end portions of the slit). Therefore, even if distortion occurs in the positional relationship between the first fixing part 40G and the second fixing part 50G due to the vibration of the studs 90u and 90b, as shown in FIG. By deforming, the restraint part 20G suppresses deformation (buckling) of the low yield point steel plate 10 in the out-of-plane direction without generating a large load on the first fixing part 40G and the second fixing part 50G. maintain the ability to

<Ninth embodiment>
In the first embodiment, in the y-axis direction, the upper holding area 10u and the lower holding area 10b are made longer than the deformation area 10m to increase their strength, but the thickness (length in the z-axis direction) is increased. The yield shear force may be increased by increasing the thickness.

FIG. 15 is a diagram for explaining the structure of a vibration damping device in a ninth embodiment of the present invention. FIG. 16 is a schematic diagram for explaining a cross section taken along the line D1-D2 in FIG. 15. A vibration damping device 1H in the ninth embodiment includes a low yield point steel plate 10H. The low yield point steel plate 10H includes an upper holding area 10uH, a lower holding area 10bH, and a deformation area 10mH. The upper holding area 10uH and the lower holding area 10bH have the same length in the y-axis direction as the deformation area 10mH. On the other hand, the upper holding area 10uH and the lower holding area 10bH are thicker than the deformation area 10mH. As a result, the upper holding region 10uH and the lower holding region 10bH have a higher yield shear force than the deformation region 10mH.

In this example, since the upper holding area 10uH and the lower holding area 10bH have approximately the same thickness as the webs 95u and 95b, the method of fixing the low yield point steel plate 10H to the webs 95u and 95b is the same as in the first embodiment. This is realized by the fixing part 70 and the lower fixing part 75. On the other hand, since the deformation area 10mH is thinner than the upper holding area 10uH and the lower holding area 10bH, in the restraint part 20H, for example, a An auxiliary plate 23 is arranged. An auxiliary plate 24 fixed to the second restraint plate 22 is also arranged between the second restraint plate 22 and the deformation region 10 mH. In this example, the restraining plate and the auxiliary plate fixed to the restraining plate are steel plates formed separately, but they may be integrally formed steel plates.

Although FIG. 16 shows an example in which the position of the deformation area 10mH with respect to the upper holding area 10uH and the lower holding area 10bH is at the center in the z-axis direction, it may be at a position biased to one side instead of the center. . In this case, the thicknesses of the auxiliary plates arranged on both sides of the deformation region 10 mH may be different, or one of the auxiliary plates may not be provided. Furthermore, a region that gradually becomes thinner may be arranged between the upper holding region 10uH (lower holding region 10bH) and the deformation region 10mH. In other words, the deformation region 10mH is ) may have a region in which the cross-sectional area (the cross-sectional area of the plane normal to the first direction) gradually changes.

<Tenth embodiment>
In the restraint part 20 in the first embodiment, the edge shape in the x-axis direction does not have to be a straight line. In the tenth embodiment, an example in which the edge shape in the x-axis direction is not a straight line will be described.

FIG. 17 is a diagram for explaining the structure of a vibration damping device according to a tenth embodiment of the present invention. A vibration damping device 1J in the tenth embodiment includes a restraint part 20J having a shape different from the restraint part 20 in the first embodiment. The first restraining plate 21J in the restraining portion 20J gradually increases in length in the x-axis direction from both ends in the y-axis direction toward the center in the y-axis direction, and reaches a maximum length in the center portion. It has a shape. In this example, the restraining portion 20J has a curved shape (for example, a circular arc shape) as the edge shapes CJa and CJb in the x-axis direction. The first restraint plate 21J has the same shape as the first restraint plate 21J, as does a second restraint plate 22J (not shown) corresponding to the first restraint plate 21J.

In this way, the further away from the fixture 45 in the y-axis direction, the greater the distance between the edge shape CJa and the splice plate 71 becomes, and the further away from the fixture 55 in the y-axis direction, the greater the distance between the edge shape CJb and the splice plate 76 becomes. The distance between becomes larger. As a result, even if the first restraining plate 21J rotates due to a shift in the positional relationship between the fixture 45 and the fixture 55, the configuration is such that the first restraining plate 21J is unlikely to come into contact with the splice plates 71 and 76. Realized. Thereby, the distance between fixture 45 and splice plate 71 and the distance between fixture 55 and splice plate 76 can be reduced. Note that when the edge shapes CJa and CJb include a circular arc shape, it is desirable that the radius of curvature of this circular arc is smaller than the distance between the fixtures 45 and 55.

<Eleventh embodiment>
Although the deformed region 10m of the low yield point steel plate 10 in the first embodiment had a generally uniform thickness, the thickness may be different in some regions. In the eleventh embodiment, an example will be described in which a depression is provided in the center of the deformation area.

FIG. 18 is a diagram for explaining the structure of a vibration damping device according to the eleventh embodiment of the present invention. FIG. 19 is a schematic diagram for explaining a cross section taken along the line E1-E2 in FIG. 18. A vibration damping device 1K in the eleventh embodiment includes a low yield point steel plate 10K having a surface shape different from that of the low yield point steel plate 10. The deformation region 10mK in the low yield point steel plate 10K has a depression region 10Kh in the central portion. The recessed region 10Kh is circular when viewed along the z-axis direction as shown in FIG. 18, and is formed to be deeper toward the center when viewed along the x-axis direction as shown in FIG. ing. In this example, the surface of the recessed region 10Kh has a partial spherical shape. Therefore, the deformation region 10mK is thinnest at the central portion of the recessed region 10Kh. In this way, the yield shear force can be lowered in the central portion of the deformation region of 10 mK.

Note that in the deformation region 10mK, a plurality of depression regions 10Kh may be arranged. Further, the shape of the recessed region 10Kh is not limited to the shape shown in FIGS. 18 and 19, but can be changed in various ways. In addition, although FIG. 19 shows an example in which the region that becomes thinner due to the formation of the depression region 10Kh in the deformed region 10mK is the central portion in the z-axis direction, even if it is not the central portion but a position biased to one side good. As a result, the recessed region 10Kh may be arranged only on either side of the deformed region 10mK.

<Modified example>
Although one embodiment of the present invention has been described above, each of the embodiments described above can be applied in combination with or replaced with each other. Furthermore, each of the embodiments described above can be modified and implemented as follows. Note that although the following description shows examples modified based on the first embodiment, modifications can also be made based on other embodiments.

(1) In the first embodiment, the size relationship of the plate thicknesses of the low yield point steel plate 10, the first restraining plate 21, the second restraining plate 22, the splice plates 71, 72, 76, 77, and the webs 95u, 95b is , is shown as an example in FIG. 3, but the relationship in size of the plate thickness between each structure may be different from the illustrated example.

(2) In the first embodiment, the vibration damping device 1 was connected to an H-shaped steel with a flange connected to the web, but at least two steel plates corresponding to the web and the flange were connected at an angle. It may be arranged in other shapes of steel, such as I-shaped steel, T-shaped steel, Z-shaped steel, channel steel, angle-shaped steel, etc.

(3) In the first embodiment, the steel members may be fixed using high-strength bolts for friction welding by another joining method such as bearing pressure welding.

(4) In the first embodiment, the second restraining plate 22 may not exist. That is, the restraining plate may be arranged only on one side of the low yield point steel plate 10. In this way, even if the restraint plate is disposed only on one side of the low yield point steel plate 10, displacement of the low yield point steel plate 10 in the out-of-plane direction can be suppressed. When restraint plates are arranged on both sides of the low-yield steel plate 10 as in the first embodiment, the displacement of the low-yield steel plate 10 in the out-of-plane direction can be more strongly suppressed, but this modification example According to the method, the amount of steel used can be reduced.

1, 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1J, 1K... Vibration damping device, 10, 10A, 10B, 10C, 10H... Low yield point steel plate, 10m, 10mB, 10mC, 10mH, 10mK ... Deformation area, 10u, 10uH... Upper holding area, 10b, 10bH... Lower holding area, 10c... Area, 10Kh... Hollow area, 20, 20aF, 20bF, 20D, 20E, 20G, 20H, 20J... Restraint part, 21, 21aF, 21bF, 21D, 21G, 21J...first restraining plate, 22,22aF, 22bF, 22D, 22G, 22J...second restraining plate, 23,24...auxiliary plate, 25...first rib, 26...second rib , 28G, 29G...slit, 40, 40aF, 40bF, 40G...first fixing part, 45, 45aF, 45bF, 45G...fixing tool, 50,50G...second fixing part, 55,55G...fixing tool, 70...upper part Fixing part, 71, 72, 76, 77... Splice plate, 73, 74, 78, 79... High strength bolt, 75... Lower fixing part, 90, 90b, 90u... Stud, 92b, 92u, 94b, 94u... Flange, 95b, 95u...web, 101b, 101u...first connection area, 102b, 102u...second connection area

Claims (12)

A first plate portion including a deformation region, a first holding region provided at one end of the deformation region, and a second holding region provided at the other end of the deformation region, wherein the first holding region and a first plate portion in which the second holding region has a lower yield shear force than the deformation region;
a second plate portion disposed on the first surface side of the first plate portion;
a first fixing part that rotatably fixes the second plate part to the first plate part in the first holding area;
a second fixing part that rotatably fixes the second plate part to the first plate part in the second holding area;
A vibration damping device equipped with. further comprising a third plate portion disposed on a second surface side opposite to the first surface side of the first plate portion,
The first fixing part fixes the second plate part and the third plate part in a rotatable state relative to the first plate part in the first holding area,
The control according to claim 1, wherein the second fixing part fixes the second plate part and the third plate part in a rotatable state with respect to the first plate part in the second holding area. Shaking device. The vibration damping device according to claim 1 or 2, wherein the plurality of second plate portions are arranged on the first surface side of the first plate portion. A first plate portion including a deformation region, a first holding region provided at one end of the deformation region, and a second holding region provided at the other end of the deformation region, wherein the first holding region and a first plate portion in which the second holding region has a lower yield shear force than the deformation region;
a second plate portion that is disposed on the first surface side of the first plate portion and includes a slit that extends in one direction;
a first fixing part that fixes the second plate part to the first plate part in the first holding area;
a second fixing part that fixes the second plate part to the first plate part in the second holding area;
A vibration damping device equipped with. further comprising a third plate part disposed on a second surface side opposite to the first surface side of the first plate part and including a slit extending in one direction,
The first fixing part fixes the second plate part and the third plate part to the first plate part in the first holding area,
The damping device according to claim 4, wherein the second fixing part fixes the second plate part and the third plate part to the first plate part in the second holding area. The damping device according to claim 4 or 5, wherein the slit extends along a first direction connecting the first fixing part and the second fixing part. The first holding area is capable of fixing the first plate part to a building structure on a first area where the first fixing part is arranged and on a side opposite to the deformation area with respect to the first area. a second region covered by a splice plate;
The second holding area includes a third area where the second fixing part is arranged, and fixes the first plate part to the structure of the building on a side opposite to the deformation area with respect to the third area. 7. A damping device according to any of claims 1 to 6, comprising a fourth region covered by a possible splice plate. The first holding area and the second holding area have a larger cross-sectional area than the deformation area on a plane normal to a first direction connecting the first fixing part and the second fixing part. A vibration damping device according to any one of claims 1 to 7. The vibration damping device according to claim 8, wherein the deformation region includes a region where the cross-sectional area gradually changes on the side of the first holding region. The damping device according to claim 8 or 9, further comprising an auxiliary plate disposed between the second plate part and the first plate part. The damping device according to any one of claims 1 to 10, wherein the second plate portion includes a rib protruding from a surface opposite to the first plate portion. The vibration damping device according to claim 11 , wherein the rib is arranged to extend in a second direction perpendicular to a first direction connecting the first fixing part and the second fixing part.

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