JP2022039271A - Damping damper - Google Patents

Abstract

To provide a damper that is incorporated into structural members such as building braces to absorb vibration energy, which is a shear yield type damping damper with a compact configuration.SOLUTION: There is provided a damping damper 10 disposed between two divided members 21a and 21b formed by dividing a structural member of a building through which vibrations such as an earthquake are transmitted at an intermediate portion in the axial direction thereof, which has a first panel 11a and a second panel 11b. The damper includes a shear panel 11 having a cross-sectional shape so that the panels 11a and 11b are orthogonal to each other at the center of each other, a first connecting member 12 that connects both ends of the first panel 11a to one of the two divided members 21a, and a second connecting member 13 that connects both ends of the second panel 11b to the other 21b of the two divided members.SELECTED DRAWING: Figure 2

Description

The present invention relates to a vibration damping damper, and more particularly to a vibration damping damper using a shear panel as a member for absorbing vibration energy.

One of the vibration damping members that suppresses the vibration of structures due to earthquakes, etc. is the elasto-plastic damper that absorbs the vibration energy of earthquakes, etc. by the historical energy due to the elasto-plastic behavior of steel materials, and low yield point steel, etc. that behaves elasto-plasticly. Many steel materials such as shaft yield type and shear yield type have been developed.

As the shaft yield type vibration damping member, there are an unbonded brace and a double steel pipe brace, both of which suppress buckling of the shaft yield member so that the elasto-plastic behavior on the tension side and the compression side becomes equal.

As a shear yield type vibration damping member, there are a stud type and a type in which a shear panel is arranged between a skeleton beam and a K-shaped brace.

Brace-type vibration damping members such as unbonded braces and double steel pipe braces have the advantage that they can be easily attached to gusset plates installed on columns and beam frames of the building body, but when the damper member length becomes longer, the elastic rigidity in the axial direction Is lowered, and the deformation of the shaft yield member at the time of yielding becomes large, so that the energy absorption efficiency in a small deformation area of the building deteriorates. Further, since the shaft yield member is not buckled, the number of members increases and the cost increases.

In shear panel type vibration damping members such as stud type, construction tends to be complicated because they are installed in a form in which long-term axial force does not act on the shear panel.

Against the above background, a brace-type vibration damping member that can be easily installed on columns and beam frames of the building body has been proposed in which the energy absorbing member is a shear yield type (for example). See Patent Documents 1 and 2). According to such a brace-type vibration damping member, the elastic rigidity is high and the energy absorption efficiency in a small deformation region of the building is improved. In addition, since it is not necessary to restrain buckling, it is possible to suppress an increase in the number of members and reduce costs.

However, in the one described in Patent Document 1, two link members 28 are provided in series in the direction of action of the axial force in order to reduce the size of the link member 28 that undergoes shear deformation in the direction perpendicular to the axis (Fig. 3). Therefore, as a result, the size of the action direction of the axial force has increased. Further, in the case described in Patent Document 2, since the shear panel is arranged on the outside of the two braces 21 and 22, the outer peripheral dimension of the damper becomes large, and it becomes difficult to apply the damper to a narrow portion.

Japanese Unexamined Patent Publication No. 2001-279948 Japanese Unexamined Patent Publication No. 2013-199823

The present invention has been made based on the above-mentioned technical background, and achieves the following object.
An object of the present invention is to provide a shear yield type vibration damping damper having a compact structure, which is a damper incorporated in a structural member such as a brace of a building to absorb vibration energy.

The present invention employs the following means in order to achieve the above problems.
That is, the present invention is a vibration damping damper arranged between two divided members formed by dividing a structural member of a building through which vibrations such as an earthquake are transmitted at an axial intermediate portion thereof.
A shear panel having a first panel and a second panel, and having these panels orthogonal to each other at the center of each other to form a cross-sectional cross section,
A first connecting member that connects both ends of the first panel to one of the two dividing members,
The damping damper is provided with a second connecting member for connecting both ends of the second panel to the other of the two dividing members.

More specifically, the first and second connecting members are parallel to each other with a base plate having one surface connected to the dividing member and an end portion fixed to the other surface of the base plate. With a pair of connecting plates that extend like
Both ends of the first and second panels may be fixed to the connection plate.

Further, the connection plate may be provided with an elongated hole, and both ends of the first and second panels may be fitted into the elongated hole. Further, a pedestal may be provided on the other surface of the base plate, and the end portion of the connection plate may be fixed to the peripheral surface of the pedestal.

Further, the surface of the pedestal may have a concave surface portion. Further, a joint may be provided on one surface of the base plate, and the first and second connecting members may be connected to the split member via the joint.

For example, the structural member is a brace installed on a pillar / beam frame of a building. Alternatively, the structural member is a stud in a building.

The shear panel may be configured by connecting a plurality of the shear panels in series, and in this case, the present invention is specified as follows.
That is, the present invention is a vibration damping damper arranged between two divided members formed by dividing a structural member of a building through which vibrations such as an earthquake are transmitted at an axial intermediate portion thereof.
With at least two shear panels having a first panel and a second panel, the panels forming a cross section by being orthogonal to each other at the center of each other.
A first connecting member located on one side of the two dividing members, connecting both ends of the first panel of the shear panel to one of the two dividing members.
A second connecting member located on the other side of the two dividing members, connecting both ends of the second panel of the shear panel to the other of the two dividing members.
The damping damper is provided with a third connecting member for connecting both ends of the first panel of one of the shear panels adjacent to each other and both ends of the second panel of the other shear panel. ..

More specifically, the first and second connecting members are parallel to each other with a base plate having one surface connected to the dividing member and an end portion fixed to the other surface of the base plate. It is provided with a pair of connecting plates extending in such a manner, and both ends of the first and second panels are fixed to the connecting plates.
The third connecting member comprises a base plate and a pair of connecting plates each having an end fixed to each of both sides of the base plate and extending so as to be parallel to each other, and the first connecting plate is attached to the first connecting plate. , Both ends of the second panel can be fixed.

According to the present invention, since the shear panel has a cross-sectional cross section consisting of a first panel and a second panel, the size of the energy absorbing portion can be minimized, and the overall structure is a compact shear yield type. Vibration damping dampers can be provided.

It is a perspective view which shows the embodiment of the vibration damping damper by this invention. The embodiment is shown, where (a) is a plan view and (b) is an elevation view. FIG. 2A is a cross-sectional view taken along the line AA of FIG. 2A. It is a perspective view of a shear panel. It is a perspective view of the 1st and 2nd connecting members (excluding the connecting plate). It is a figure which shows the installation example of the vibration damping brace which applied the vibration damping damper by this invention. It is a figure which shows the example which applied the vibration damping damper by this invention to the stud vibration damping. The state of the vibration damping damper according to the present invention at the time of compression operation is shown, (a) is a plan view, and (b) is an elevation view. The state of the vibration damping damper according to the present invention at the time of tension operation is shown, (a) is a plan view, and (b) is an elevation view. Another embodiment is shown, where (a) is a plan view and (b) is an elevation view.

Embodiments of the present invention will be described below with reference to the drawings. 1 is a perspective view showing an embodiment of a vibration damping damper according to the present invention, FIG. 2 (a) is a plan view, FIG. 2 (b) is an elevation view, and FIG. 3 is a line AA of FIG. 2 (a). A cross-sectional view taken along the arrow, FIG. 4 is a perspective view showing a shear panel, and FIG. 5 is a perspective view showing a base plate and a pedestal of the first and second connecting members.

The vibration damping damper 10 is incorporated into a structural member of a building such as a brace or a stud to which vibration such as an earthquake is transmitted. Specifically, it is arranged between two divided members formed by dividing the structural member at the intermediate portion in the axial direction.

The vibration damping damper 10 includes a shear panel 11, a first connecting member 12 that connects the shear panel 11 to one of the two dividing members, and a second connecting member 13 that connects the shear panel 11 to the other of the two dividing members. Equipped with.

As shown in FIG. 4, the shear panel 11 has a rectangular first panel 11a and a second panel 11b, respectively, and these panels 11a and 11b are orthogonal to each other at the intermediate portion in the longitudinal direction, so that the cross section is cross-shaped. Is doing. As the first and second panels 11a and 11b constituting the shear panel 11, in addition to the low yield point steel, the extremely low yield point steel, the SN material, and the SM material are used.

The first and second connecting members 12 and 13 have the same structure except that the arrangement form is different. That is, the first and second connecting members 12 and 13 have a rectangular base plate 14. A joint 15 is provided on one surface of the base plate 14. The first and second connecting members 12 and 13 are connected to each of the two dividing members via the joint 15. The structure of the joint 15 will be described later.

A pedestal 16 is provided on the other surface of the base plate 14. The pedestal 16 is a rectangular shape having an outer diameter smaller than that of the base plate 14, and has a predetermined thickness. A pair of connection plates 17 and 17 extending so as to be parallel to each other are provided on the peripheral surface of the pedestal 16. Further, on the surface of the pedestal 16, a concave surface portion 18 whose depth increases toward the central portion between the connection plates 17 and 17 is formed.

The connecting plate 17 is formed with an elongated hole 19 extending in the same direction as the extending direction of the plate. The shear panel 11 is arranged between the first and second panels 11a and 11b so that the widthwise end faces of the first and second panels 11a and 11b face the pedestals 16 of the first and second connecting members 12 and 13. Further, in the first and second connecting members 12 and 13, the connecting plates 17 and 17 of the second connecting member 13 are the first so that the connecting plates 17 and 17 of the first connecting member 12 are at right angles to the first panel 11a. The two panels are arranged so as to be perpendicular to the panel 11b.

That is, the first and second connecting members 12 and 13 are arranged so as to have a positional relationship in which one is rotated 90 degrees with respect to the other around the central axis of the shear panel 11. Then, both ends in the longitudinal direction of the first panel 11a are in the elongated holes 19 of the connection plates 17 and 17 of the first connecting member 12, and both ends in the longitudinal direction of the second panel 11b are the connection plates 17 and 17 of the second connecting member 13. It is fitted into each of the elongated holes 19 and fixed to each connection plate 17 by welding.

The joint 15 fixed to one surface of the base plate 14 of the first and second connecting members 12 and 13 is made of short H-shaped steel in this embodiment. The axial end face of the joint 15 is fixed to the base plate 14 by welding. A plurality of bolt holes 20 are formed in the web and the flange of the joint 15.

When the structural member of the building into which the damping damper 10 is incorporated is, for example, a brace made of H-shaped steel, the damping damper 10 is arranged between the two split braces 21a and 21b divided in the axial direction (FIG. 2). reference). Then, in each case, the ends of the split braces 21a and 21b made of H-shaped steel and the ends of the joint 15 are butted against each other, and a steel plate for connection is applied to the butt ends with high-strength bolts inserted into the bolt holes 20. By fastening, the damping damper 10 is fixed between the split braces 21a and 21b. In this way, a brace (vibration control brace) provided with the vibration control damper 10 is formed.

FIG. 6 shows an installation example of the vibration control brace 21 provided with the vibration control damper 10. The vibration control brace 21 is installed on the pillar / beam frame of the building via the rectangular frame 23. FIG. 6A is an example in which the vibration control brace 21 is installed between the lower corners and the upper center of the frame 23.

In FIG. 6B, a vibration damping brace 21 is installed between the upper corners and the upper center of the frame 23, and a vibration damping function is provided between the lower corners and the upper center of the frame 23. This is an example of installing a normal brace 22 that does not have.

In FIG. 6C, two braces 22 and 22 having rotatably connected ends are installed between both lower corners and the upper center of the frame 23, and the respective connecting portions are connected. This is an example in which the vibration control brace 21 is installed between the frame body 23 and the upper corners of the frame body 23.
When the building where the vibration control brace 21 is installed is newly constructed, the vibration control brace 21 is directly attached to the gusset plate installed on the column / beam frame without going through the frame 23.

FIG. 7 shows a case where the structural member of the building in which the vibration damping damper 10 is incorporated is a stud 24 which is located between the columns 26 and 26 in the column / beam frame and connects the upper and lower beams 27 and 27. The vibration damping damper 10 is arranged in the horizontal direction between the upper divided studs 24a and the lower divided studs 24b divided in the axial direction. In this case, the first and second connecting members 12 and 13 of the vibration damping damper 10 are not provided with the joint 15, and the brackets 25 and 25 fixed to the upper split studs 24a and the lower split studs 24b, respectively, are the first. The base plates 14 of the second connecting members 12 and 13 are fixed by welding, bolts, nuts, or the like.

When vibration due to an earthquake or the like is transmitted to the structural member of the building in which the vibration damping damper 10 is incorporated, the vibration damping damper 10 operates as shown in FIGS. 8 and 9. FIG. 8 shows a state when a force for compressing in the axial direction acts on the vibration damping damper 10. At this time, the first and second connecting members 12 and 13 approach each other, and accordingly, the connecting plates 17 and 17 of the first connecting member 12 move toward the base plate 14 of the second connecting member 13 and the second. The connecting plates 17 and 17 of the connecting member 13 are displaced toward the base plate 14 of the first connecting member 12, respectively.

Due to the displacement of the connection plates 17 and 17, the first and second panels 11a and 11b of the shear panel 11 are sheared and deformed in opposite directions to absorb vibration energy. During the compression operation of the vibration damping damper, the first and second panels 11a and 11b that have been sheared and deformed approach the pedestals 16 of the first and second connecting members 12 and 13, but the pedestal 16 is provided with a concave surface portion 18. Therefore, they do not interfere with each other.

FIG. 9 shows a state when a pulling force in the axial direction acts on the vibration damping damper 10. At this time, the first and second connecting members 12 and 13 are separated from each other, and the connecting plates 17 and 17 of the first connecting member 12 are separated from each other from the base plate 14 of the second connecting member 13. The connection plates 17 and 17 of the second connecting member 13 are displaced so as to be separated from the base plate 14 of the first connecting member 12. Due to the displacement of the connection plates 17 and 17, the first and second panels 11a and 11b of the shear panel 11 are sheared and deformed in opposite directions to absorb vibration energy.

According to the above embodiment, the following effects can be obtained.
(1) Since the shear panel has a cross-sectional cross-section consisting of a first panel and a second panel, the size of the energy absorbing part can be kept to a minimum, and the overall structure is a compact shear yield type vibration damping. Dampers can be provided.
(2) Since the first panel and the second panel are sheared and deformed in the opposite directions when the shear panel is operated, twice the stroke of a single shear panel can be secured.

(3) Since it is an elasto-plastic behavior due to shear deformation of the first panel and the second panel, when the above vibration damping damper is applied to the vibration damping brace, the tension side of the brace member is similar to the unbonded brace and the double steel pipe brace. And the elasto-plastic behavior on the compression side can be made equal.
(4) When the shear panel is operated, the connection plate is bent and deformed due to the shear deformation of the first panel and the second panel. Therefore, the restraint on both ends of each panel is weakened, cracks are less likely to occur between each panel and the connection plate, and the deformation performance of the shear panel can be improved (Reference: Low yield point steel shear panel). Repeated loading experiment of damper, Structural Engineering Papers VOL.53A (March 2007)).

(5) The shear panel used in the present invention requires a smaller width-thickness ratio D / tw (D: panel width, tw: panel thickness) than a general shear panel used for stud vibration control. The D / tw of a general shear panel is about 30 to 50, and the D / tw of the shear panel used in the present invention is about 10. This eliminates the need for buckling stiffening ribs provided on the side surface of a general shear panel, and can reduce costs.
(6) Welding assembly of the vibration damping damper itself is all factory-produced, and at the construction site, the joint and the structural member can be joined with high-strength bolts, so workability is good. In addition, the vibration damping damper can be easily replaced simply by removing the high-strength bolt.

FIG. 10 shows another embodiment of the present invention. The shear panel 11 used for the vibration damping damper 10 is not limited to one as in the above embodiment, and a plurality of shear panels 11 can be connected and used in series. FIG. 10 is an embodiment of a vibration damping damper 10 in which two shear panels 11 and 11 are connected in series. The shear panels 11 are not limited to two, but three or more can be connected.

The first and second connecting members 12 and 13 are the same as those shown in the above embodiment, and the connecting plates 17 and 17 of the first connecting member 12 have two divided members 21a and 21b obtained by dividing the structural member. On the other hand, the first panel 11a of the shear panel 11 located on the 21a side is fixed. Further, the second panel 11b of the shear panel 11 located on the other 21b side of the two dividing members 21a and 21b is fixed to the connection plates 17 and 17 of the second connecting member 13.

In this embodiment, a third connecting member 30 for connecting the shear panels 11 and 11 adjacent to each other is provided. The third connecting member 30 has a base plate 31, and pedestals 32 and 33 are fixed to both sides of the base plate 31. The pedestals 32 and 33 are similar to the pedestals 16 of the first and second connecting members 12 and 13, but the pedestals 32 and 33 are positioned so that one of them is rotated 90 degrees around the central axis of the shear panel 11 with respect to the other. It is provided in.

A pair of connecting plates 17 and 17 extending so as to be parallel to each other are provided on the peripheral surfaces of the pedestals 32 and 33. The connection plates 17 and 17 provided on the pedestals 32 and 33 are the same as those provided on the pedestal 16, and are provided with elongated holes 19.

Then, both ends of the second panel 11b of the one shear panel 11 are fitted into the elongated holes 19 of the connection plates 17 and 17 provided on the one pedestal 32 and fixed by welding. Further, both ends of the first panel 11a of the other shear panel 11 are fitted into the elongated holes 19 of the connection plates 17 and 17 provided on the other pedestal 33 and fixed by welding. In this way, the shear panels 11 and 11 adjacent to each other are connected by the third connecting member 30.

Each of the above embodiments is merely an example, and the present invention can take various embodiments. For example, in the above embodiment, the joint is fixed to the surface of the base plate, but when applied to the vibration control brace, the base plate may be directly fixed to the split brace by welding without providing the joint. However, as described above, it is preferable to provide a joint in terms of facilitating on-site work.

10: Vibration damping damper 11: Shear panel 11a: 1st panel 11b: 2nd panel 12: 1st connecting member 13: 2nd connecting member 14: Base plate 15: Joint 16: Base 17: Connection plate 18: Concave part 19 : Long hole 21: Vibration control brace 21a, 21b: Split brace 24: Stud 24a, 24b: Split stud

Claims (10)

It is a vibration damping damper placed between two divided members formed by dividing the structural members of a building to which vibrations such as earthquakes are transmitted at the intermediate part in the axial direction.
A shear panel having a first panel and a second panel, and having these panels orthogonal to each other at the center of each other to form a cross-sectional cross section,
A first connecting member that connects both ends of the first panel to one of the two dividing members,
A vibration damping damper including a second connecting member that connects both ends of the second panel to the other of the two dividing members. The first and second connecting members are a pair of a base plate whose one surface is connected to the dividing member and a pair of base plates whose ends are fixed to the other surface and extend so as to be parallel to each other. Equipped with a connection plate,
The vibration damping damper according to claim 1, wherein both ends of the first and second panels are fixed to the connection plate. The vibration damping damper according to claim 2, wherein the connection plate is provided with an elongated hole, and both ends of the first and second panels are fitted into the elongated hole. The vibration damping damper according to claim 2 or 3, wherein a pedestal is provided on the other surface of the base plate, and an end portion of the connection plate is fixed to the peripheral surface of the pedestal. The vibration damping damper according to claim 4, wherein the surface of the pedestal has a concave surface portion. One of claims 2 to 5, wherein a joint is provided on one surface of the base plate, and the first and second connecting members are connected to the split member via the joint. The described damping damper. The vibration damping damper according to any one of claims 1 to 6, wherein the structural member is a brace installed on a pillar / beam frame of a building. The vibration damping damper according to any one of claims 1 to 6, wherein the structural member is a stud of a building. A vibration-damping damper placed between two divided members formed by dividing a structural member of a building through which vibrations such as an earthquake are transmitted at the intermediate portion in the axial direction.
With at least two shear panels having a first panel and a second panel, the panels forming a cross section by being orthogonal to each other at the center of each other.
A first connecting member located on one side of the two dividing members, connecting both ends of the first panel of the shear panel to one of the two dividing members.
A second connecting member located on the other side of the two dividing members, connecting both ends of the second panel of the shear panel to the other of the two dividing members.
A vibration damping damper provided with a third connecting member for connecting both ends of a first panel of one shear panel adjacent to each other and both ends of a second panel of the other shear panel. The first and second connecting members are a pair of a base plate whose one surface is connected to the dividing member and a pair of base plates whose ends are fixed to the other surface and extend so as to be parallel to each other. A connection plate is provided, and both ends of the first and second panels are fixed to the connection plate.
The third connecting member comprises a base plate and a pair of connecting plates each having an end fixed to each of both sides of the base plate and extending so as to be parallel to each other, and the first connecting plate is attached to the first connecting plate. The vibration damping damper according to claim 9, wherein both ends of the second panel are fixed.

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