JP2011157788A - Viscoelastic damper device and crossing structure of framework member using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a viscoelastic damper device which maintains the flexibility of a design of a building and sufficiently secures the efficiency of energy absorption by a viscoelastic body, and also to provide a crossing structure of a framework member using the viscoelastic damper device. <P>SOLUTION: This viscoelastic damper device installed at the crossing portion of framework members includes a first hard plate comprising a first fixed part fixable to the side surface of one framework member and a first extension part extending from the first fixed part along the one framework member, a second hard plate comprising a second fixed part fixable to the side surface of the other framework member and a second extension part which is bent from the end of the second fixed part according to the crossing angle of the framework members and which faces the first extension part, and a sheet-like viscoelastic body disposed between the first extension part and the second extension part. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a viscoelastic damper device that is installed in a house or the like and reduces shaking of a building due to an earthquake or wind, and a cross structure of a shaft assembly using the viscoelastic damper device.

  In recent years, damper devices for reducing shaking of buildings have been widely used. In a building where a damper device is installed, the amplitude when receiving an earthquake or wind is reduced, and the vibration can be attenuated at an early stage. There are various types of such damper devices, but a damper device using a viscoelastic body as an energy absorber (hereinafter referred to as “viscoelastic damper device”) is excellent in the degree of freedom of shape. Widely adopted.

  As a conventional viscoelastic damper device, for example, there is one used in the earthquake-proof reinforcement structure described in Patent Document 1. The viscoelastic damper device includes a first hard plate projecting from a side surface of one shaft assembly material at a crossing portion of the shaft assembly material, and a direction orthogonal to the first hard plate from the side surface of the other shaft assembly material. A projecting second hard plate is provided, and a sheet-like viscoelastic body is disposed between the first hard plate and the second hard plate.

  Moreover, as a viscoelastic damper apparatus from which the structure and arrangement | positioning of a hard board differ, there exists a viscoelastic damper apparatus of patent document 2, for example. In this viscoelastic damper device, the first hard plate and the second hard plate sandwiching the viscoelastic body are opposed to the shaft assembly material so that the sheet-like viscoelastic body faces the crossing portion of the shaft assembly material. It is provided diagonally.

Japanese Patent No. 3667123 Specification Patent No. 4094035

  In the configuration of Patent Document 1 described above, when the shaft assembly is deformed in the rotation direction in the event of an earthquake or the like, the first hard plate and the second hard plate are rotationally displaced in opposite directions, and the viscoelastic body Energy is absorbed by shear deformation. However, in this configuration, the deformation of the viscoelastic body is small at a location near the crossing portion of the shaft assembly, which is the center of rotational deformation, and the deformation of the viscoelastic material is large at a location far from the crossing portion. Therefore, when the viscoelastic body is formed with a uniform thickness, there is a problem that the energy absorption efficiency varies depending on the portion.

  On the other hand, in the configuration of Patent Document 2, since the entire viscoelastic body is deformed in the compression direction or the tensile direction with respect to the displacement of the shaft assembly in the rotation direction, the problem that the energy absorption efficiency of the viscoelastic body varies hardly occurs. it is conceivable that. However, in this configuration, since the first hard plate and the second hard plate sandwiching the viscoelastic body are provided obliquely with respect to the frame assembly material, the other members constituting the building and these hard plates Therefore, there is a problem that the degree of freedom in building design is lost.

  The present invention has been made to solve the above-mentioned problems, and can use a viscoelastic damper device that can maintain the degree of freedom of building design and can sufficiently secure the energy absorption efficiency of the viscoelastic body, and the same. It aims at providing the cross structure of a shaft assembly.

  That is, the present invention is a viscoelastic damper device installed at a crossing portion between shaft assemblies, and includes a first fixing portion that can be fixed to a side surface of one shaft assembly, and a surface from the first fixing portion. The first hard plate having a first extending portion extending in one, the second fixing portion that can be fixed to the side surface of the other shaft assembly material, and the second according to the crossing angle between the shaft assembly materials A second rigid plate that is bent from an end portion of the fixed portion and has a second extension portion opposed to the first extension portion, and between the first extension portion and the second extension portion. A viscoelastic damper device provided with a sheet-like viscoelastic body arranged is provided.

  Furthermore, this invention is the cross structure of the shaft assembly material which installs the viscoelastic damper apparatus of Claim 1 in the intersection part of shaft assembly materials, Comprising: The said 1st fixing | fixed part is one shaft assembly material. The second fixing portion is fixed to the side surface of the other shaft assembly, and is formed by the first extension portion, the second extension portion, and the viscoelastic body. A cross structure of a shaft assembly in which an energy absorbing portion of a viscoelastic damper device is in contact with a side surface of the one shaft assembly is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the freedom degree of design of a building can be maintained and the energy absorption efficiency by a viscoelastic body can fully be ensured.

It is a perspective view which shows one Embodiment of the cross structure of the shaft assembly which concerns on this invention. It is a perspective view which shows the effect | action of the viscoelastic damper apparatus applied to the cross structure of the shaft assembly shown in FIG. It is a perspective view which shows another effect | action of the viscoelastic damper apparatus applied to the cross structure of the shaft assembly shown in FIG. It is a perspective view which shows the modification of the cross structure of the shaft assembly which concerns on this invention. It is a perspective view which shows another modification of the cross structure of the shaft assembly which concerns on this invention. It is a perspective view which shows another modification of the cross structure of the shaft assembly which concerns on this invention.

  In this viscoelastic damper device, the first extension portion of the first hard plate extends flush with the first fixing portion, while the second extension portion of the second hard plate intersects the shaft members. It is bent from the end of the second fixed portion according to the angle. For this reason, if the 1st fixed part and the 2nd fixed part are fixed to the 1st axis assembly material and the 2nd axis assembly material, the 1st extension part, the 2nd extension part, and sheet-like viscoelasticity The energy absorbing portion formed by the body comes into contact with the side surface of the first shaft assembly.

  With such a configuration, in this viscoelastic damper device, when the first shaft assembly material is inclined with respect to the second shaft assembly material due to an earthquake or the like, or is about to rise, the viscoelastic body is uniform. Shear deformation occurs and energy can be efficiently absorbed by the entire viscoelastic body. This makes it possible to reduce the thickness of the viscoelastic body, and realize a reduction in the thickness of the viscoelastic damper device. Moreover, in this viscoelastic damper apparatus, since an energy absorption part touches the side surface of a 1st shaft assembly material, the other member which comprises a building may interfere with the member which protrudes from the cross | intersection part of a shaft assembly material. Absent. Accordingly, the degree of freedom in building design can be maintained.

  Further, the cross structure of the shaft assembly according to the present invention is a cross structure of the shaft assembly in which the viscoelastic damper device is installed at the intersection of the shaft assemblies, and the first fixing portion is one of the crossing structures. The viscoelasticity formed by the first extension portion, the second extension portion, and the viscoelastic body is fixed to the side surface of the shaft assembly material, and the second fixing portion is fixed to the side surface of the other shaft assembly material. The energy absorbing portion of the damper device is in contact with the side surface of one shaft assembly.

  In the cross structure of the shaft assembly material, the first fixing portion and the second fixing portion of the viscoelastic damper device are fixed to the first shaft assembly material and the second shaft assembly material, and the first extension portion, The energy absorbing portion formed by the two extension portions and the sheet-like viscoelastic body is in contact with the side surface of the first shaft assembly. With such a configuration, in this cross structure of shaft assemblies, when the first shaft assembly is inclined with respect to the second shaft assembly due to an earthquake, etc. Such shear deformation occurs, and the entire viscoelastic body can efficiently absorb energy. Further, in this cross structure of the shaft assembly, since the energy absorbing portion is in contact with the side surface of the first shaft assembly, the other members constituting the building interfere with the members protruding from the intersection of the shaft assembly. There is nothing. Accordingly, the degree of freedom in building design can be maintained.

  Moreover, the side surface of one shaft assembly material is provided with a first recess corresponding to the thickness of the energy absorbing portion, and the first fixing portion is formed on the inner side of the first recess portion. It is preferable to be fixed to the side surface.

  In addition, a second depression corresponding to the thickness of the second hard plate is provided on the side surface of the other axle assembly material, and the second fixing part is arranged on the other axle assembly inside the second depression. It is preferable to be fixed to the side of the material.

  In this case, since the viscoelastic damper device is accommodated inside the first dent portion and the second dent portion, the configuration of the intersecting portion of the shaft assembly is further simplified, and the degree of freedom in designing the building can be further maintained. Note that, as described above, in this viscoelastic damper device, the viscoelastic body can be thinned, so that the amount of depression in the first depression and the second depression can be small. Therefore, there is hardly a problem that the strength of the shaft assembly is reduced due to the provision of these recesses.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a viscoelastic damper device according to the present invention and a cross structure of a shaft assembly using the same will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view showing an embodiment of a cross structure of shaft assemblies according to the present invention. As shown in the figure, the cross structure 1 of the shaft assembly material is, for example, at the intersection K between the pillar (first shaft assembly material) 2 and the beam (second shaft assembly material) 3 of a building such as a house. It is configured by installing the viscoelastic damper device 10.

  The viscoelastic damper device 10 is a device that absorbs energy applied to the column 2 and the beam 3 due to, for example, an earthquake or wind, and a first hard plate 11 fixed to the column 2 and a second fixed to the beam 3. And a viscoelastic body 13 disposed between the first hard plate 11 and the second hard plate 12.

  The first hard plate 11 is formed in a rectangular shape having substantially the same width as the side surface 2a of the column 2 by using a material that is sufficiently harder than the viscoelastic body 13 such as iron or stainless steel. A substantially half portion on one side of the first hard plate 11 serves as a first fixing portion 14 that is fixed to the side surface 2a of the pillar 2, and a plurality of (four in this embodiment) screw holes are provided. ing. Further, a substantially half portion on the other side of the first hard plate 11 is a first extension portion 15 that extends flush with the first fixing portion 14.

  Similar to the first hard plate 11, the second hard plate 12 is formed to be substantially equal in width to the side surface 3 a of the beam 3 by using a material that is sufficiently harder than the viscoelastic body 13 such as iron or stainless steel. . A substantially half portion on one side of the second hard plate 12 is a second fixing portion 16 that is fixed to the side surface 3a of the beam 3, and a plurality of (four in this embodiment) screw holes are provided. ing. Further, the substantially half portion on the other side of the second hard plate 12 is bent at a substantially right angle from the end portion of the second fixing portion 16 along the side surface 2 a of the column 2, and faces the first extension portion 15. A second extension 17 is provided.

  The viscoelastic body 13 is formed in a rectangular sheet shape by a viscoelastic material such as an acrylic resin. The viscoelastic body 13 is disposed between the first extension 15 and the second extension 17 and is firmly fixed to the first extension 15 and the second extension 17 by, for example, adhesion. In the first extension portion 15 and the second extension portion 17, the adhesive surface with the viscoelastic body 13 has a desired adhesive strength enhancement such as shot blast treatment, film treatment, or hot dip galvanization treatment. It is preferable to perform a surface treatment for exhibiting the effect.

  In the viscoelastic damper device 10 having the above-described configuration, the first fixing portion 14 is screwed to the side surface 2a of the column 2 and the second fixing portion 16 is screwed to the side surface 3a of the beam 3. It is firmly fixed to the intersection K. At this time, the energy absorbing portion 18 of the viscoelastic damper device 10 formed by the first extension portion 15, the second extension portion 17, and the viscoelastic body 13 is formed at the base end portion of the column 2. The state is in contact with the side surface 2a.

  Then, the effect of the viscoelastic damper apparatus 10 is demonstrated.

  In the viscoelastic damper device 10, when the column 2 is displaced so as to be lifted with respect to the beam 3 due to an earthquake or the like, the first hard plate 11 is lifted and displaced with respect to the second hard plate 12, as shown in FIG. To do. At this time, in the energy absorbing portion 18 of the viscoelastic damper device 10, the second extension portion 17 is slightly tilted along the column 2, whereas the first extension portion 15 follows the column 2 and is lifted and displaced. To do.

  Therefore, the viscoelastic damper device 10 is deformed in the tensile direction based on the difference between the displacement amount of the first extension portion 15 and the displacement amount of the second extension portion 17 along the column 2, and the viscoelastic body When uniform shear deformation occurs in 13, energy is efficiently absorbed by the entire viscoelastic body 13. As described above, the entire viscoelastic body 13 is uniformly deformed and can efficiently absorb energy, so that the sheet-like viscoelastic body 13 can be thinned, and the viscoelastic damper device 10 can be thinned. Can be realized.

  Moreover, in the viscoelastic damper apparatus 10, since the energy absorption part 18 touches the side surface 2a of the pillar 2, the other member which comprises a building interferes with the member which protrudes from the crossing part K of the pillar 2 and the beam 3. There is nothing. Accordingly, the degree of freedom in building design can be maintained.

  In the viscoelastic damper device 10, the energy absorbing portion 18 needs to follow the lifting displacement of the column 2, and therefore it is particularly preferable that the thickness of the second hard plate 12 is reduced. On the other hand, when the thickness of the second hard plate 12 is reduced, for example, as shown in FIG. 3, when the column 2 is inclined to the installation side of the viscoelastic damper device 10, the second hard plate 12 is caused by stress in the compression direction. There is a concern that 12 will buckle.

  However, in the viscoelastic damper device 10, the second extension portion 17 of the second hard plate 12 is bent at a substantially right angle from the end of the second fixing portion 16 and is along the side surface 2 a of the column 2. No. 2 is displaced only to the extent that the viscoelastic damper device 10 is installed on the wood. Therefore, the second hard plate 12 can be prevented from buckling due to stress in the compression direction, and the thickness of the second hard plate 12 can be reduced.

  The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the first hard plate 11 is fixed only to the side surface 2a of the column 2 and the second hard plate 12 is fixed only to the side surface 3a of the beam 3. For example, as shown in FIG. In addition, the first extension fixing portions 21 projecting from the side surfaces 2 b and 2 b on both sides of the side surface 2 a of the column 2 are provided on both sides of the first fixing portion 14 and the first extension portion 15 of the first hard plate 11. In addition, the second extended fixing portions 22 that protrude from the side surfaces 3 b and 3 b on both sides of the side surface 3 a of the beam 3 may be provided on both sides of the second fixing portion 16 of the second hard plate 12. .

  In this case, the fixed state of the first hard plate 11 and the second hard plate 12 with respect to the column 2 and the beam 3 is further stabilized, and the deformation loss of the viscoelastic body 13 when the column 2 is displaced is effectively suppressed. Can do. Therefore, the entire viscoelastic body 13 can absorb energy more efficiently.

  For example, as shown in FIG. 5, the viscoelastic damper device 10 may be applied to an intersection K where the hole-down hardware 31 is installed. Even when the hole-down hardware 31 is installed, although the pull-out of the pillar 2 from the beam 3 can be reduced, the lifting amount of the pillar 2 does not become zero. Therefore, in the viscoelastic damper device 10, the viscoelastic body 13 is deformed by using the amount by which the column 2 is lifted, so that the shaking of the building can be reduced.

  In this case, the anchor bolt 32 of the hole-down hardware 31 is passed through, for example, the second fixing portion 16 of the second hard plate 12, and used together with the screw fixing by the second fixing portion 16 by the nut 33 attached to the anchor bolt 32. Thus, it is preferable to fix the second fixing portion 16 to the beam 3. If it carries out like this, the fixed state with respect to the beam 3 of the 2nd hard board 12 will be stabilized more, and the deformation | transformation loss of the viscoelastic body 13 when the pillar 2 will be displaced can be suppressed effectively.

  For example, as shown in FIG. 6, in the cross structure 1 of the shaft assembly material, the first recess 41 corresponding to the thickness of the energy absorbing portion 18 is provided on the side surface 2 a of the pillar 2, and the second hard plate 12. The second recess 42 corresponding to the thickness of the beam 3 is provided on the side surface 3a of the beam 3, the first fixing portion 14 is fixed to the side surface 2a of the column 2 inside the first recess 41, and the second fixing portion 16 may be fixed to the side surface 3 a of the beam 3 inside the second recess 42.

  In this case, since the viscoelastic damper device 10 is accommodated inside the first dent 41 and the second dent 42, the configuration of the intersection K is further simplified, and the degree of freedom in designing the building can be further maintained. As described above, in the viscoelastic damper device 10, the viscoelastic body 13 can be thinned, so that the amount of depression in the first depression 41 and the second depression 42 can be small. Therefore, a decrease in the strength of the column 2 and the beam 3 due to the provision of the hollow portions 41 and 42 hardly poses a problem.

  As a modification of the configuration of FIG. 6, only the first depression 41 is provided on the side surface 2 a of the column 2, and the first fixing portion 14 is fixed to the side 2 a of the column 2 inside the first depression 41. May be. Alternatively, only the second hollow portion 42 may be provided on the side surface 3 a of the beam 3, and the second fixing portion 16 may be fixed to the side surface 3 a of the beam 3 inside the second hollow portion 42.

  Furthermore, the viscoelastic damper device 10 can be applied not only to the intersection K between the column 2 and the beam 3 as described above, but also to an intersection of other shaft assemblies such as an intersection of the beam and the beam.

  DESCRIPTION OF SYMBOLS 1 ... Cross structure of shaft assembly material, 2 ... Column (1st shaft assembly material), 2a ... Side surface, 3 ... Beam (2nd shaft assembly material), 3a ... Side surface, 10 ... Viscoelastic damper apparatus, 11 ... 1st rigid board, 12 ... 2nd rigid board, 13 ... Viscoelastic body, 14 ... 1st fixing | fixed part, 15 ... 1st extension part, 16 ... 2nd fixing | fixed part, 17 ... 2nd extension Part, 18 ... energy absorbing part, 41 ... first dent part, 42 ... second dent part, K ... crossing part.

Claims (4)

It is a viscoelastic damper device installed at the intersection of shaft assemblies,
A first hard plate having a first fixing portion that can be fixed to a side surface of one shaft assembly, and a first extension portion that extends flush with the first fixing portion;
A second fixing portion that can be fixed to a side surface of the other shaft assembly, and a second bending portion that is bent from an end of the second fixing portion according to an intersection angle between the shaft assembly members, and faces the first extension portion. A second hard plate having a second extension;
A viscoelastic damper device comprising a sheet-like viscoelastic body disposed between the first extension portion and the second extension portion. A cross structure of a shaft assembly in which the viscoelastic damper device according to claim 1 is installed at an intersection between the shaft assemblies,
The first fixing portion is fixed to a side surface of one shaft assembly, and the second fixing portion is fixed to a side surface of the other shaft assembly, and the first extension portion and the second extension A cross structure of a shaft assembly in which an energy absorbing portion of the viscoelastic damper device formed by a portion and the viscoelastic body is in contact with a side surface of the one shaft assembly. A side surface of the one shaft assembly is provided with a first depression corresponding to the thickness of the energy absorption unit,
The cross structure of the shaft assembly according to claim 2, wherein the first fixed portion is fixed to a side surface of the one shaft assembly inside the first recess. A side surface of the other shaft assembly is provided with a second depression corresponding to the thickness of the second hard plate,
The cross structure of the shaft assembly according to claim 2 or 3, wherein the second fixing portion is fixed to a side surface of the other shaft assembly inside the second recess.

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