JP2003049557A - Building damping device - Google Patents

Abstract

(57) [Abstract] [Problem] To provide a vibration damper having a large deformation with a restoring force so that a predetermined seismic resistance and vibration damping performance can be exhibited stably even after many months have passed since the initial installation. . SOLUTION: A frame member (10, 10, 11, 1) of a building is provided.
1) In a vibration damping device for a building constructed by mounting a vibration damper 1 between gusset plates 14 and 14 'fixed on the side, the vibration damper 1 is relatively movable in the axial direction so as to constitute the vibration damper 1. Of the plurality of assembled steel plates, the plate-shaped mounting portion 5 connected to the two steel plates 2A, 2A fixedly joined to one gusset plate 14
A coiled elastic spring 8 for applying an axial deformation restoring force to the vibration damper 1 between the steel plate 2B and one axial end of the steel plate 2B fixedly joined to the other gusset plate 14 '. Are stretched in series with one steel plate 2B.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a building vibration damping device. Specifically, for example, in order to enhance the seismic resistance and damping performance of new or existing buildings such as buildings and detached houses,
A damping damper made by interposing an energy absorbing material such as a viscoelastic body between two rigid members that are relatively movable in the axial direction is installed between two frame members that can be relatively displaced in the building. The present invention relates to a vibration damping device for a building.

[0002]

2. Description of the Related Art In order to improve the seismic resistance and damping performance of buildings such as buildings, viscoelastic dampers, viscous dampers, etc. are provided between joints of frame members such as columns and beams or columns and beams.
It has been widely known that various vibration dampers such as oil dampers are installed as braces and canes.

In the conventional general vibration damping device for a building, when designing a vibration damping damper which is a main function part thereof, it is possible to efficiently absorb the vibration energy input to the building due to an earthquake or the like to enhance a predetermined vibration damping performance. It is no exaggeration to say that the emphasis is on obtaining information, and that little attention is paid to measures after the end of vibration such as an earthquake. For example, as an energy absorbing material, a viscoelastic damper that uses a viscoelastic body that has excellent energy absorption performance over a wide range of deformation from small deformation to large deformation and that has resilience to small deformation. Even when using as a vibration damper, in order to enhance the ability of the viscoelastic body to absorb vibration energy, the viscosity is primarily emphasized, and the elasticity that is the restoring force after the end of deformation has not been considered. In many cases, the entire vibration damper including the energy absorbing material does not return to its original state after large deformation.

[0004]

In the conventional vibration damping device for a general building as described above, a predetermined vibration resistance and vibration damping performance are provided by the vibration damping damper only when the building is deformed within the elastic range of the energy absorbing material. However, after the building undergoes a large deformation until it enters the plastic region of the energy absorbing material, the damping damper including the energy absorbing material does not return to its original state, so the building deforms next. When it does, it is not possible to exert seismic resistance and vibration control performance at all, or even if it can be exerted, a significant decrease in performance is unavoidable, and after being repeatedly deformed many times over many years There was a problem that the prescribed seismic performance and vibration control performance could not be maintained, such as the building being greatly distorted and deformed or collapsed.

The present invention has been made in view of the above-mentioned circumstances, and the damping damper after large deformation is given a restoring force so that predetermined seismic resistance and damping performance can be stably exhibited even after many years have passed since installation. The purpose of the present invention is to provide a vibration damping device for a building.

[0006]

In order to achieve the above object, the vibration damping device for a building according to the present invention interposes an energy absorbing material between two rigid members assembled so as to be relatively movable in the axial direction. A vibration damping device for a building, which is constructed by erection of a vibration damper thus made between two frame members which are capable of relative displacement in a building, and which is a joint part of two frame members of the building, or An elastic spring that gives a deformation restoring force to the vibration damper is interposed between the members connected to it.

According to the present invention having the above-described structure, since a dedicated elastic spring for imparting a deformation restoring force is provided in addition to the vibration damping damper, the vibration damping damper should be designed as follows.
The design emphasis is placed on the use of energy absorbers that absorb vibration energy most efficiently, and the elastic springs provide elastic resistance to deformation of the building, which results in high vibration damping. While exhibiting its performance, after the end of deformation due to an earthquake, etc., the vibration damper containing the deformed energy absorbing material is returned to its original state by the restoring force of the elastic spring, and the same vibration is generated during the deformation accompanying the next vibration addition. It is possible to maintain the damping performance. As a result, even after many years have passed since the installation of the vibration damping damper, the predetermined seismic resistance and vibration damping performance can be stably exhibited, and distortion deformation and collapse of the building can be reliably prevented.

In particular, as a vibration damper, as described in claim 2, a viscoelastic damper in which a viscoelastic body is sandwiched between opposing surfaces of a plurality of rigid members arranged in parallel to each other. When the building is used, even if the building deforms significantly beyond the elastic range of the viscoelastic body to the plastic region, after the end of the deformation, the large shear-deformed viscoelastic damper is restored to the excellent original hysteresis characteristic and it has been used for many years. The seismic resistance and damping performance after use can be maintained more stably.

In the vibration damping device for a building described above, the elastic spring for applying the deformation restoring force to the vibration damping damper may be interposed in parallel with the vibration damping damper separately from the vibration damping damper. Further, as described in claim 4, it may be interposed in series with a part of the rigid members joined to one joint of the plurality of rigid members constituting the vibration damper,
In particular, in the case of interposing in series, even if the energy absorbing material such as the viscoelastic body breaks at the bonding point with the rigid member for damper construction due to a large deformation that exceeds the expectation, the damping damper can be completely removed. Without disassembling, it is possible to maintain some rigid members and elastic springs in series in the erected state between the joints of two frame members that can be displaced relative to each other in the building, and therefore a large earthquake It is possible to further enhance the effect of preventing the collapse of the building when it is greatly deformed.

Further, as described above, a part of the rigid members joined to one joint of the plurality of rigid members constituting the vibration damper and the elastic spring are interposed in series. According to a seventh aspect of the present invention, the elastic spring is covered with another rigid member excluding a part of the rigid member that constitutes the vibration damper, for example, the rigid members are arranged in parallel to each other. In the case of a flat strip that has been installed, it is located between the adjacent flat strips, and in the case of a tubular body in which the rigid members are fitted concentrically inside and outside, the storage position is inside one of the tubular bodies. By adopting a configuration that allows the entire elastic spring to be exposed, performance deterioration due to rusting etc. and performance failure due to entrapment of foreign substances are eliminated, and the deformation restoring action of the elastic spring is stable for a long period of time. It is possible to equity.

A viscoelastic body is most effective as an energy absorbing material for the vibration damper of the present invention.
In addition to the viscoelastic body, a viscous body or an elastoplastic body may be used.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic front view showing a completed state of a vibration damping device for a building according to the present invention. A beam 1 vertically adjacent to columns 10 and 10 (frame members) that are horizontally adjacent to each other.
In a steel frame building (building) constructed by constructing a skeleton body 13 including 1 and 11 (frame members) in a plurality of rows in the horizontal direction and in a plurality of stages in the vertical direction, among the plurality of skeleton bodies 13, ... Vibration dampers 1, 1 ... Are respectively installed as braces on two rows of frame bodies 13, 13 which are positioned at every other position in the horizontal direction.

More specifically, as shown in FIG. 2, when each frame 13 is constructed and vibration such as an earthquake is input to the building, one of the columns 10 and the upper beam 11 which are relatively displaced relative to each other is located at the inner corner of the joint. A fixed gusset plate (joint part) 14 and the other pillar 10
And the gazette plate (joint portion) 14 'fixed to the inner corner of the joint of the lower beam 11 and the damping dampers 1 ... Fasteners 6, 6 such as bolts and nuts on the ´
It is installed by being fixedly joined via the ‘

As shown in FIG. 3, for example, the vibration damper 1 includes two steel plate plates (an example of a strip-shaped flat rigid member) 2A, 2A and two steel plate plates 2A, which are arranged in parallel and face each other. The viscoelastic bodies 3 which are an example of an energy absorbing material are sandwiched between the facing surfaces of one steel plate (an example of a band-shaped rigid member) 2B arranged in parallel to the central position between the 2A and the two plates. The two steel plate plates 2A, 2A on one end side in the longitudinal direction of the space maintaining members 4, 4
And the plate-shaped mounting portion 5 for the one gusset plate 14 is connected via the bolt and nut 9, and
A mounting portion 5'for the other gusset plate 14 'is formed by a plate-shaped portion integrally extending from the steel plate 2B on the other end side in the longitudinal direction of the one steel plate 2B.

The damping damper 1 having such a structure is shown in FIG.
When vibration energy such as an earthquake is input to the building and the columns 10, 10 and the beams 11, 11 constituting the skeleton 13 are relatively displaced in the erected state shown in Fig. 2, the two steel plate plates 2A, 2A, 2A and one steel plate 2B
And are to move relatively in the direction in which the layered viscoelastic bodies 3 and 3 are sheared, that is, in the axial direction, and exhibit absorption and damping performance of vibration energy.

As the damping damper 1, as shown in FIG. 3, three steel plate plates 2A, 2A, 2B are used and two layers of viscoelastic bodies 3, 3 are sandwiched between opposing surfaces. In addition to the above, one layer of viscoelastic material is sandwiched between two steel plates facing each other, and four layers of viscoelastic material are sandwiched between each steel surface using five steel plates. Not only various types of multi-layered viscoelastic dampers, but also viscous or elastoplastic bodies containing oil between two plate-like or tubular rigid members that are assembled so that they can move relative to each other in the axial direction. You may use the viscous damper and hysteresis damper which are made to do.

In the vibration damping damper (viscoelastic damper) 1 which is used by being installed between the gazette plates 14 and 14 'of the frame 13 of the building as shown in FIG. 2, it is fixed to one gazette plate 14 of the frame 13. Between the two steel plate plates 2A to be joined, the plate-shaped mounting portion 5 connected to the 2A side, and the one axial end portion of one steel plate plate 2B fixedly joined to the other gusset plate 14 ', A coil-shaped elastic spring 8 that applies a deformation restoring force in the axial direction to the vibration damper 1 is in a state of being in series with one steel plate 2B, and by the two steel plates 2A and 2A, it is moved vertically or horizontally. It is stretched (interposed) so that it is covered.

According to the vibration damping device for a building in which the vibration damping damper 1 is interposed as described above, at the normal time of the initial installation,
As shown in the schematic view of FIG. 4A, the viscoelastic bodies 3 and 3 are in a non-deformed state. In this state, vibration energy such as an earthquake is input to the building and the columns 10, 10 and the beams 11, 11 constituting the frame body 13 are relatively displaced, and along with this, an axial tensile force is applied to the vibration damper 1 At this time, as shown in the schematic view of FIG. 4B, the two steel plate plates 2A, 2A and the one steel plate plate 2B relatively move in the axial direction to shear and deform the layered viscoelastic bodies 3, 3. As a result, vibration energy absorption and damping performance is exhibited, and the prescribed seismic performance and vibration damping performance are obtained.

After the end of vibration due to an earthquake or the like, the entire vibration damper 1 including the sheared and deformed layered viscoelastic bodies 3 and 3 is restored by the elastic spring 8 as shown in the schematic view of FIG. The original state, that is, the initial state of erection shown in Fig. 4 (a), is restored, and the entire building is restored to the original state accordingly, so vibration energy such as an earthquake is input to the building next. Pillars 10 and 10 and needle 1 that form the skeleton structure 13
Even when 1, 1 are relatively displaced, the vibration damping performance equivalent to that described above is maintained, and it is possible to exhibit the predetermined seismic performance and vibration damping performance. In particular, by using a viscoelastic damper as the vibration damper 1, even if the building is greatly deformed until it goes beyond the elastic range of the viscoelastic bodies 3 and 3 into the plastic region, it undergoes a large plastic deformation after the deformation ends. It is possible to restore the viscoelastic bodies 3 and 3 to the original hysteresis characteristics and stably maintain the seismic resistance and the vibration damping performance after many years of use.

Further, since the elastic spring 8 is interposed in series with the single steel plate 2B of the vibration damper 1, the viscoelastic body 3 is accompanied by a large deformation which is unexpected.
3 is an adhesion point x with two steel plate plates 2A, 2A
Even if it is broken by, the steel plate 2B in series and the elastic spring 8 in the serial state without completely disassembling the vibration damper 1 are two frame members 1 capable of relative displacement of the building.
The erected state is maintained over the 0 and 11 gusset plates 14 and 14 ', and therefore, the collapse prevention effect of the building at the time of large deformation such as a large earthquake can be further enhanced.

5 to 8 schematically show the construction of another embodiment of the vibration damping damper 1 which is the main functional portion of the building vibration damping device according to the present invention. In the embodiment shown in FIG.
Separately from the viscoelastic damper (vibration damper) 1 having the configuration as shown in FIG. 1, the coiled elastic spring 8 is arranged in parallel with the viscoelastic damper 1 across the gusset plates 14 and 14 ′ of the building frame 13. It was stretched in the state of. Figure 6
In the embodiment shown in Fig. 3, in the viscoelastic damper (vibration damper) 1 having the structure as shown in Fig. 3, one gusset plate 14 of the frame structure 13 of the building is provided at one end in the axial direction.
Axial deformation with respect to the vibration damper 1 between the other axial end of each of the two steel plate plates 2A, 2A that are connected to the mounting portion 5 that can be fixedly joined to each other and the other gusset plate 14 '. A coil-shaped elastic spring 8 which gives a restoring force,
The two steel plate plates 2A and 2A are stretched in series.

Further, in the embodiment shown in FIG. 7, the cylindrical viscoelasticity is provided between the inner and outer circumferential surfaces of the two rigid members 2B 'and 2A' which are made of metal cylindrical bodies which are concentrically fitted inside and outside. A cylindrical viscoelastic damper (vibration damper) 1 including a body 3 is used, and an inner cylinder rigid member 2B of the cylindrical viscoelastic damper 1 is used.
Between the axial one end portion of ‘′ and the mounting portion 5 on the outer cylinder rigid member 2 </ b> A ′ side that can be fixedly joined to the one gusset plate 14 of the skeleton 13, the axial deformation restoring force with respect to the vibration damping damper 1. The coil-shaped elastic spring 8 that gives the force is in series with the inner cylinder rigid member 2B ′ and the outer cylinder rigid member 2A ′.
It is stretched so that it can be housed inside. Further, in the embodiment shown in FIG. 8, two steel plate plates 2A, 2A are shared, and one steel plate plate 2 is provided in parallel with the two steel plate plates 2A, 2A on both sides in the axial direction.
B and 2B are arranged, and two viscoelastic dampers 1A, which are formed by interposing viscoelastic bodies 3, 3 between the opposing surfaces of the steel plate plates 2B and 2B and the two common steel plate plates 2A and 2A, respectively. One steel plate 2B, 2 in 1A
A coil-shaped elastic spring 8 that applies a deformation restoring force in the axial direction is stretched between the ends of B.

In each of the embodiments shown in FIGS. 5 to 7, the columns 10, 10 and the beams 11, 11 constituting the frame structure 13 by inputting vibration energy such as an earthquake into the building
Is relatively displaced, the rigid members constituting the vibration damper 1, that is, the two steel plate plates 2A, 2A and one steel plate plate 2B or the outer cylinder rigid member 2A 'and the inner cylinder rigid member 2B' are layered. The viscoelastic bodies 3 and 3 or the cylindrical viscoelastic body 3 are shear-deformed relative to each other in the axial direction to exert predetermined seismic resistance and vibration damping performance, while shear deformation is caused after the end of vibration due to an earthquake or the like. The entire damping damper 1 including the layered viscoelastic bodies 3 and 3 or the tubular viscoelastic body 3 is returned to the initial state of the erection by the restoring force of the elastic spring 8, and the entire building is in the original state accordingly. Since the vibration energy such as an earthquake is input to the building and the columns 10, 10 and the needles 11, 11 constituting the frame structure 13 are displaced relative to each other, the same seismic performance and damping are obtained. The performance can be sustained.

In particular, as in the embodiment shown in FIG. 7, when the elastic spring 8 for restoring the deformation is stretched so as to be housed in the outer cylinder rigid member 2A constituting the vibration damper 1, the elastic spring 8 is elastic. Since the spring 8 is protected by the outer cylinder rigid member 2A, the performance is not deteriorated by being exposed to rainwater or the like and rusting to deteriorate the performance or entrapment of foreign matters floating around the performance. The deformation restoring action by the elastic spring 8 can be stably maintained for a long period of time.

In the case of the embodiment shown in FIG. 8, vibration energy such as an earthquake is input to the building and the two columns are viscous due to the relative displacement of the columns 10, 10 and the beams 11, 11 constituting the frame structure 13. Even if the elastic dampers (vibration dampers) 1A and 1B move relative to each other in either axial direction by receiving the compressive force and the tensile force in the axial direction, after the end of the vibration, the deformation restoring force of the single coil-like elastic spring 8 causes both of them to move. The viscoelastic dampers 1A and 1B can be restored to their original state.

[0026]

As described above, according to the present invention, by separately providing a dedicated elastic spring for imparting a deformation restoring force, the vibration damping damper itself can most efficiently transmit the vibration energy due to an earthquake or the like. Although the design is focused on using an energy absorbing material that absorbs the energy, the vibration damper is restored to its original state by the restoring force of the elastic spring after the end of vibration due to an earthquake, etc. It is possible to maintain the initial performance such that the same vibration damping performance is exhibited even when deformed. Therefore, by simply modifying the structure by adding elastic springs, even after many years have passed from the initial stage of installation of the vibration damper, the specified seismic performance and vibration damping performance can be stably exerted to prevent distortion of the building. The effect of being able to surely prevent or collapse is exhibited.

In particular, when a viscoelastic damper formed by sandwiching a viscoelastic body in layers between opposing surfaces of a plurality of rigid members arranged in parallel to each other is used as a vibration damper. Even if the building is greatly deformed beyond the elastic range of the viscoelastic body to the plastic region, after the end of deformation, the large shear-deformed viscoelastic damper is restored to its excellent original hysteresis characteristics and used for many years. It is possible to maintain the seismic resistance performance and vibration control performance of the product more stably.

Further, as described in claim 4, the elastic spring for restoring the deformation in series with a part of the rigid members joined to one joint of the plurality of rigid members constituting the vibration damper. By adopting a configuration in which the vibration damper is interposed, even if the energy absorbing material such as the viscoelastic body breaks at the adhesion point with the rigid member for damper construction due to unexpectedly large deformation, the damping damper is completely disassembled. Without letting
It is possible to maintain some rigid members and elastic springs in series in a erected state that spans the joints between two frame members that can be displaced relative to each other in the building, and The collapse prevention effect can be further enhanced.

Further, as described in claim 7, the elastic spring for restoring the deformation is covered with other rigid members excluding a part of the rigid members constituting the vibration damper, for example, the rigid members are parallel to each other. In the case of flat strips that are arranged opposite to each other, the flat strips are positioned between adjacent flat strips, and in the case of a tubular body in which the rigid members are fitted concentrically inside and outside, one of the tubular bodies is By adopting a configuration that is stored inside, the entire elastic spring is prevented from being exposed, performance deterioration due to rusting etc. and performance failure due to entrapment of foreign substances are eliminated, and the elastic spring's deformation restoring action can be done for a long time. It can be maintained stable over the entire range.

[Brief description of drawings]

FIG. 1 is a schematic front view showing a completed state of a vibration damping device for a building according to the present invention.

FIG. 2 is an enlarged front view of the main part of FIG.

FIG. 3 is an enlarged side view showing the structure of a vibration damper.

4 (a) to 4 (c) are schematic views for explaining state changes at the initial stage of installation, during deformation, and during restoring force.

FIG. 5 is a schematic diagram showing a configuration of a second exemplary embodiment.

FIG. 6 is a schematic diagram showing a configuration of a third exemplary embodiment.

FIG. 7 is a schematic diagram showing a configuration of a fourth exemplary embodiment.

FIG. 8 is a schematic diagram showing a configuration of a fifth exemplary embodiment.

[Explanation of symbols]

1,1A, 1B damping damper 2A, 2B Steel plate (rigid member) 2A ', 2B' Cylinder rigid member 3 Viscoelastic body (energy absorbing material) 8 Elastic spring for applying deformation restoring force 10 columns (frame members) 11 Beams (frame members) 14,14 'Gazette plate (joint site)

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Claims (8)

[Claims] 1. A vibration damping damper having an energy absorbing material interposed between two rigid members assembled so as to be relatively movable in the axial direction across a joint portion between two frame members which can be relatively displaced in a building. A vibration damping device for a building constructed by erection of a structure, wherein an elastic spring for imparting a deformation restoring force to a vibration damper is interposed between a joint portion of two frame members of the building or a member connected thereto. A vibration control device for buildings. 2. The vibration damping damper is a viscoelastic damper formed by sandwiching a viscoelastic body in a layered manner between facing surfaces of a plurality of rigid members arranged in parallel to each other. Vibration control device for buildings. 3. The building vibration damping device according to claim 1, wherein the elastic spring is interposed in parallel with the vibration damping damper separately from the vibration damping damper. 4. The elastic spring is interposed in series with a part of a rigid member joined to one joint of a plurality of rigid members constituting a vibration damper. Damping device for the building described in. 5. The vibration damping device for a building according to claim 1, wherein each of the plurality of rigid members forming the vibration damping damper is a flat strip plate. 6. The vibration damping system for a building according to claim 1, wherein the plurality of rigid members forming the vibration damping damper are cylindrical bodies fitted inside and outside concentrically. apparatus. 7. An elastic spring interposed in series with a part of a rigid member joined to one joint of a plurality of rigid members constituting the vibration damper is a part of the rigid member. The building vibration damping device according to any one of claims 4 to 6, which is covered with a rigid member other than. 8. The vibration damping device for a building according to claim 1, wherein the elastic spring is a coil spring.