JP2007247278A - Seismic control damper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce construction time and labor by forming an integral structure and to improve a seismic control effect as damping performance can be expected in a wide range from small deformation to large deformation. <P>SOLUTION: This seismic control damper 1 is provided with first viscoelastic bodies 13A, 13B clamped between a pair of internal steel plates 11A, 11B and an intermediate steel plate 12 provided in a fixed state between the internal steel plates 11A, 11B, and a sliding mechanism 20 sliding parallel with the intermediate steel plate 12, with friction members 21A, 21B disposed between the internal steel plates 11A, 11B and the intermediate steel plate 12. The seismic control damper 1 is further provided with a pair of external steel plates 31A, 31B provided to hold the internal steel plates 11A, 11B, and second viscoelastic bodies 32A, 32B clamped between the external steel plates 31A, 31B and the internal steel plates 11A, 11B. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vibration damper having a configuration in which a viscoelastic body is sandwiched between a plurality of steel materials.

Conventionally, it is well known to install a damping damper that absorbs vibration energy caused by an earthquake and suppresses deformation of a structure at an appropriate position of a building or the like. This damping damper includes a viscoelastic damper in which a viscoelastic body is sandwiched between an outer steel plate and an inner steel plate. In an architectural framework built with viscoelastic dampers, when the building is displaced during an earthquake, the external steel plate and the internal steel plate are relatively displaced in the plane, and vibration energy is generated by the viscous resistance force of the viscoelastic body generated at that time. Absorbs and damps building vibration. This viscoelastic damper is designed to give viscoelastic dampers large physical properties (high rigidity, high damping coefficient) when the damping property is exerted in a small deformation region or when the design requirements for seismic effect are severe. Is common. However, if a large force is to be borne from small deformations such as small and medium-sized earthquakes and winds, the burden due to large deformations such as large earthquakes becomes excessive, and the joint between the damping damper and the building frame or the surrounding frame The burden on was increasing.
In response to such problems, a viscoelastic body is installed so that a damping effect can be exhibited from a small deformation, and an excessive force is applied to the viscoelastic body for a large deformation such as when a large-scale earthquake occurs. In order to suppress this, there is a mechanism in which a viscoelastic damper and a friction damper are combined (for example, see Patent Documents 1 and 2).
Moreover, as another seismic damper corresponding to the above-described problem, for example, Patent Documents 3 and 4 disclose structures in which different types of viscoelasticity are combined.
Patent Document 3 has a structure in which a viscoelastic body is sandwiched between a plurality of steel plates, and a viscoelastic body having a low shear modulus and a viscoelastic body having a high shear modulus are parallel to the surface of the steel plate. Is laminated. According to this, for example, the vibration energy is absorbed by a viscoelastic body with a low shear modulus for vibration such as wind, and the vibration energy is absorbed by a viscoelastic body with a high shear modulus for vibration such as a large earthquake. can do.
Patent Document 4 discloses that a single damping damper is obtained by combining viscoelastic bodies having different physical property values between a viscoelastic body having strong viscous properties and a viscoelastic body having strong elastic properties in the same gap between steel plates. It was made to function as.
JP-A-9-268802 Japanese Patent Laid-Open No. 10-299284 JP 2004-132415 A JP 2000-297557 A

However, in Patent Documents 1 and 2, since the viscoelastic damper and the friction damper are composed of separate members and parts, and the respective members are connected to each other, the selection of the combination of members and the vibration damper and While there is a degree of freedom in the design of joints with buildings, there are cases where it takes time and effort to design and construct.
Patent Documents 3 and 4 are structures in which small deformation to large deformation are attenuated only by the viscoelastic body provided in the vibration damper, and the durability, material, thickness, size, etc. of the viscoelastic body There is a problem that it is difficult to sufficiently exhibit the damping performance by combining a plurality of different types of viscoelastic bodies.

  The present invention has been made in view of the above-described problems, and can be reduced in construction labor by making it an integral structure. Further, the damping performance can be expected over a wide range from a small deformation to a large deformation, and the vibration control effect is improved. The goal is to provide a controlled damping damper.

In order to achieve the above object, a damping damper according to the present invention is a damping damper in which a viscoelastic body is sandwiched between a plurality of steel plates, and between a pair of first steel plates and first steel plates. A friction material is disposed between the first viscoelastic body sandwiched between the second steel plate provided in a fixed state and the pair of the first steel plate and the second steel plate. And a second viscoelastic body sandwiched between a pair of third steel plates and a first steel plate so as to sandwich the pair of first steel plates. It is characterized by that.
In the present invention, the third steel plate and the first steel plate are relatively deformed against a small deformation such as a wind fluctuation or a small-scale earthquake, and the second viscoelastic body absorbs vibration energy and is controlled. The For large deformation such as during a relatively large earthquake, in addition to the relative deformation of the third steel plate and the first steel plate, the first viscoelastic body in which the first steel plate and the second steel plate are relatively deformed and By sliding the sliding mechanism, the vibration energy can be absorbed and controlled. The vibration energy in such a large deformation can be shared by both the first viscoelastic body and the sliding mechanism, and the large deformation load is not borne by the sliding mechanism alone, and the vibration is oscillated within the sliding range of the sliding. Therefore, sudden changes in control force can be suppressed, and the vibration control effect can be improved.

In the vibration damping damper according to the present invention, it is preferable that the first viscoelastic body has a larger thickness dimension than the second viscoelastic body.
In the present invention, a small deformation can be borne by the second viscoelastic body having a small thickness, and a large deformation can be borne by the first viscoelastic body having a large thickness.

Further, in the vibration damper according to the present invention, the first viscoelastic body and the second viscoelastic body may be different.
In the present invention, by disposing different types of the first viscoelastic body and the second viscoelastic body (for example, characteristics of rigidity or shear elastic modulus), in the case of small deformation and in the case of large deformation Can be attenuated correspondingly.

In the damping damper according to the present invention, the sliding mechanism preferably slides when a predetermined load larger than a corresponding load is applied by the second viscoelastic body.
In the present invention, a load smaller than a predetermined load is made to correspond by the second viscoelastic body, and a larger predetermined load is made to correspond by the operation of the sliding mechanism, so that each member is assigned from a small deformation to a large deformation. Therefore, the damping performance as a seismic damper can be controlled effectively.

According to the seismic damper of the present invention, the first viscoelastic body and the sliding mechanism are integrally combined, and are not composed of separate members and parts as in the prior art. Time and effort can be reduced.
In addition, vibration energy is absorbed by the second viscoelastic body for small deformations such as wind fluctuations and small earthquakes, and the first viscoelastic body and large deformations for relatively large earthquakes. Vibration energy can be absorbed by the sliding mechanism. And, by combining the sliding mechanism and the first viscoelastic body, it is possible to suppress the generation of excessive load on the first and second viscoelastic bodies even when shifting from a small deformation to a large deformation. The amount of vibration energy absorbed can be larger than that of the body.
In this way, since one damping damper can be expected to have an optimum damping performance that can cope with the deformation over a wide range from a small deformation to a large deformation, the damping effect can be improved.

Hereinafter, a first embodiment of a vibration damper according to the present invention will be described with reference to FIGS.
1 is a side view showing a damping damper according to the first embodiment of the present invention, FIG. 2 is a front view showing the damping damper, FIG. 3 is an enlarged view showing a sliding mechanism of the damping damper, and FIG. FIGS. 6A and 6B are diagrams showing the operation state of the damping damper during displacement, FIGS. 5A and 5B are diagrams showing the relationship between displacement and load in the conventional example, and FIGS. ) Is a diagram showing the relationship between displacement and load in the example, and FIG. 7 is a diagram showing the relationship between displacement and load in the comparative example.

As shown in FIG. 1 and FIG. 2, the present damping damper 1 is installed as a wall type between a column (not shown) and a beam 2 (upper beam 2A, lower beam 2B). This damping damper 1 is composed of a first viscoelastic damper 10 provided with a sliding mechanism 20 and a second viscoelastic damper 30 provided so as to sandwich the first viscoelastic damper 10 from both side surfaces thereof. .
The first viscoelastic damper 10 is fixed to the upper floor beam 2A by fixing means such as a bolt via the first connecting members 3 and 3 at the upper end 10a. On the other hand, the 2nd viscoelastic damper 30 is being fixed to the lower floor beam 2B by fixing means, such as a volt | bolt, via the 2nd connection member 4 at the lower end 30a.

  As shown in FIG. 1, the first viscoelastic damper 10 includes a pair of internal steel plates 11A and 11B (first steel plate), and an intermediate steel plate 12 (second steel plate) provided in a fixed state with both internal steel plates 11A and 11B. 1st viscoelastic bodies 13A and 13B sandwiched between the two (this is defined as a gap S). Further, the first viscoelastic damper 10 is provided with friction materials 21A, 21B between the upper end portions 11a, 11a of the internal steel plates 11A, 11B and the intermediate steel plate 12, so as to contact the intermediate steel plate 12, A sliding mechanism 20 that slides parallel to the side surface of the intermediate steel plate 12 is provided. The friction materials 21A and 21B and the first viscoelastic bodies 13A and 13B are disposed in the same gap S, respectively.

Here, the sliding mechanism 20 will be described in more detail.
As shown in FIG. 3, in the gap S described above, the friction materials 21 </ b> A and 21 </ b> B of the sliding mechanism 20 are fixed to the internal steel plates 11 </ b> A and 11 </ b> B via the intervention members 22 and 22. The sliding mechanism 20 includes the internal steel plates 11A and 11B, the intervention members 22 and 22, the friction materials 21A and 21B, and the intermediate steel plate 12 with bolts 23 at three locations (see FIG. 2) where the friction materials 21A and 21B are arranged. And the nut 24 is screwed and tightened. A plurality of disc springs 25 are inserted through the bolt 23 so as to be coaxial with the bolt shaft. With the disc spring 25, the friction materials 21A and 21B can be set to have a predetermined friction force. In addition, the long hole 12a (refer FIG. 2) is formed in the penetration part of each volt | bolt 23 in the intermediate steel plate 12. As shown in FIG. With such a configuration, the first viscoelastic damper 10 can slide within the range of the long hole 12a.

The second viscoelastic damper 30 shown in FIG. 1 is configured so that the inner steel plates 11A and 11B of the first viscoelastic damper 10 are connected to the outer steel plates 31A and 31B (third steel plates) via the second viscoelastic bodies 32A and 32B. ). The second viscoelastic bodies 32A and 32B are smaller in thickness than the first viscoelastic bodies 13A and 13B and are formed with a large area.
The first and second viscoelastic bodies 13A, 13B, 32A, 32B can employ, for example, rubber materials, resin materials, etc., and the same kind of members or different kinds of members may be used. .

  As shown in FIG. 4A, the damping damper 1 having such a configuration has a small thickness dimension and a large damping property when a small deformation is caused by a wind or a small-scale earthquake. 32A, 32B (second viscoelastic damper 30) is operated, and the outer steel plates 31A, 31B and the inner steel plates 11A, 11B are relatively deformed (this is referred to as first relative deformation). That is, when a small deformation is applied, the vibration is suppressed by absorbing the vibration energy by the second viscoelastic bodies 32A and 32B of the second viscoelastic damper 30.

On the other hand, as shown in FIG. 4B, when a large deformation is caused by a large-scale earthquake, an appropriate force (corresponding to the predetermined load of the present invention) is applied in addition to the first relative deformation described above. When the internal steel plates 11A and 11B and the intermediate steel plate 12 are relatively deformed (this is referred to as second relative deformation), the vibration energy is absorbed by the action of the first viscoelastic bodies 13A and 13B and the sliding mechanism. Can be controlled.
Thereby, it can suppress that the load which generate | occur | produces in a viscoelastic body with respect to a big deformation becomes excessive, and the burden to the junction part of a damping damper 1 and a housing of a building, or a surrounding frame becomes large, Furthermore, even if the thickness dimension is reduced, breakage due to exceeding the limit shear strain of the viscoelastic material itself can be prevented.
Moreover, in this damping damper 1, since the sliding mechanism 20 is integrated with the first viscoelastic bodies 13A and 13B via the internal steel plates 11A and 11B, the construction at the site is simplified and the construction is performed. Time and effort can be reduced. And since these members are not separated, for example, it is easy to calculate the damping performance, and there is an effect that the design becomes easy.

(Example)
Next, the damping performance of the damping damper 1 according to the present embodiment will be described in more detail based on the result of analyzing the relationship between deformation and load.
As shown in Table 1, in this analysis, three analyzes were performed: an example using the damping damper 1 according to the present embodiment, a conventional example, and a comparative example.
The conventional example has a viscoelastic body (corresponding to the second viscoelastic bodies 32A and 32B) having an area of 1.3 m ² and a thickness of 1.0 cm, and the first viscoelastic bodies 13A and 13B and the sliding mechanism 20 are not provided. This is an analysis using a general viscoelastic damper (see FIG. 1).
An example is the vibration damper 1 according to the present embodiment, the first viscoelastic bodies 13A and 13B have an area of 1.3 m ² and a thickness of 0.5 cm, and the second viscoelastic bodies 32A and 32B have an area of 0. In this analysis, the thickness is 8 m ² , the thickness is 1.0 cm, and the frictional force in the sliding mechanism 20 is 50 t.
In the comparative example, the second viscoelastic bodies 13A and 13B have an area of 1.3 m ² and a thickness of 0.5 cm, the frictional force in the sliding mechanism 20 is 100 t, and the first viscoelastic bodies 13A and 13B in the embodiment are The analysis is based on a configuration that is not provided.

FIG. 5 to FIG. 7 show the hysteresis characteristics of the viscoelastic body showing the relationship between the load and deformation when an external force is applied to each damping damper. This is the amount of vibration energy absorbed.
And in each analysis by a prior art example, an Example, and a comparative example, it was set and analyzed so that a control force of 100 t might act at about 4 cm of displacement.
The analysis result will be described. In FIG. 6A of the example, it can be confirmed that the range of the load region with respect to the displacement is wider than that of FIG. You can see that it is getting bigger. That is, in the conventional example shown in FIG. 5A, a viscoelastic body having a thickness of 1 cm is used in order to correspond to a displacement of 4 cm. The viscoelastic body itself is greatly distorted and its rigidity is reduced compared to that of 5 cm.
Therefore, in the embodiment, as shown in FIG. 6B, a control force of about 50 to 70 t is obtained by the action of the second viscoelastic bodies 32A and 32B within a small range of displacement of about 1 cm or less. It can be confirmed that the amount of vibration energy absorbed is larger than the control force of 40 to 60 t of the conventional example shown.

  Moreover, as shown in FIG. 7, in the comparative example, since the first viscoelastic bodies 13A and 13B are not provided, the second relative deformation (that is, the internal steel plates 11A and 11B and the intermediate steel plates 12) described above in a large displacement range. Relative deformation) and most of the large displacement is borne by the sliding mechanism 20. Since the sliding amount of the sliding mechanism 20 is regulated by the size of the elongated hole 12a (see FIG. 2) of the intermediate steel plate 12, the peak of the large load and displacement is cut and the fluctuation of the vibration becomes severe, and the response acceleration increases or remains. There is concern about the occurrence of deformation.

  From these analysis results, it can be confirmed that in the embodiment shown in FIG. 6, the vibration energy at a large displacement is shared by the first viscoelastic bodies 13A and 13B and the sliding mechanism 20. Thus, the large deformation force is not borne only by the sliding mechanism 20, and the vibration can be controlled within the sliding range of the sliding mechanism 20, so that a sudden change in the control force can be suppressed. Moreover, since the first viscoelastic bodies 13A and 13B bear a part, it is possible to suppress the occurrence of residual deformation in the sliding mechanism 20.

The damping damper 1 according to the first embodiment described above has a structure in which the first viscoelastic bodies 13A and 13B and the sliding mechanism 20 are integrally combined, and is configured from separate members and parts as in the prior art. Therefore, it is possible to reduce the time and effort involved in design and construction.
In addition, vibration energy is absorbed by the second viscoelastic bodies 32A and 32B for small deformations such as wind fluctuations and small-scale earthquakes, and the first viscosity is used for large deformations during relatively large earthquakes. Vibration energy can be absorbed by the elastic bodies 13 </ b> A and 13 </ b> B and the sliding mechanism 20. And by combining the sliding mechanism 20 and the first viscoelastic bodies 13A and 13B, even if the small deformation changes to the large deformation, the first viscoelastic bodies 13A and 13B and the second viscoelastic bodies 32A and 32B Generation | occurrence | production of an excessive load can be suppressed and the absorption amount of vibration energy can be enlarged rather than the conventional viscoelastic body.
In this way, since one damping damper can be expected to have an optimum damping performance that can cope with the deformation over a wide range from a small deformation to a large deformation, the damping effect can be improved.

Next, a second embodiment of the present invention will be described with reference to the accompanying drawings, but the same or similar members and parts as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted. A configuration different from that of the first embodiment will be described.
FIGS. 8A and 8B are diagrams showing the vibration damper according to the second embodiment, in which FIG. 8A is a front view and FIG. 8B is a side view thereof.
As shown in FIGS. 8A and 8B, the damping damper 1 of the second embodiment has each steel plate, that is, the inner steel plates 11A and 11B, the intermediate steel plate 12, and the outer steel plates 31A and 31B having a rectangular shape. The brace material 5 is formed and functions as a brace arranged in an oblique direction in a frame surrounded by, for example, a beam and a column. The first viscoelastic bodies 13A and 13B and the second viscoelastic bodies 32A and 32B that are sandwiched between these steel plates are also formed to have dimensions that match the size of the brace material 5.
The sliding direction by the sliding mechanism 20 at this time is the axial direction of the brace material 5. That is, the longitudinal direction of the long hole 12b formed in the intermediate steel material 12 shown in FIG. 8A is the axial direction of the brace material 5. Therefore, the first viscoelastic bodies 13A, 13B, the sliding mechanism 20, and the second viscoelastic bodies 32A, 32B are arranged in the axial direction of the brace material 5 with respect to the deformation applied to the vibration damper 1 according to the second embodiment. It will be attenuated.
In the damping damper 1 of the second embodiment, the shape for functioning as the brace material 5 is formed as described above. However, the action and effect as the damping damper 1 are described in the first embodiment. It is the same.

The first and second embodiments of the vibration damping damper according to the present invention have been described above. However, the present invention is not limited to the first and second embodiments described above, and does not depart from the spirit thereof. The range can be changed as appropriate.
For example, in the first and second embodiments, the area of the first viscoelastic body 13 is larger than the area of the second viscoelastic body 32, but regarding the setting of the viscoelastic body, the material, the physical property value, It is preferable to set based on conditions such as shape, thickness, and area.
Further, the first viscoelastic body 13 and the second viscoelastic body 32 can be attenuated corresponding to the case of a small deformation and the case of a large deformation by changing the thickness dimension. It will never be done. That is, by disposing different types of first viscoelastic body 13 and second viscoelastic body 32 (for example, characteristics of rigidity or shear modulus), it is possible to cope with the above-described large and small deformations. Also good.

It is a side view which shows the damping damper by 1st embodiment of this invention. It is a front view which shows a damping damper. It is an enlarged view which shows the sliding mechanism of a damping damper. (A), (b) is a figure which shows the operating state of the damping damper at the time of a displacement. (A), (b) is a figure which shows the relationship between the displacement and load in a prior art example. (A), (b) is a figure which shows the relationship between the displacement and load in an Example. It is a figure which shows the relationship between the displacement and load in a comparative example. It is a figure which shows the damping damper by 2nd embodiment, Comprising: (a) is the front view, (b) is the side view.

Explanation of symbols

1 Damping damper 10 First viscoelastic damper 11A, 11B Internal steel plate (first steel plate)
12 Intermediate steel plate (second steel plate)
13A, 13B First viscoelastic body 20 Sliding mechanism 21A, 21B Friction material 30 Second viscoelastic damper 31A, 31B External steel plate (third steel plate)
32A, 32B second viscoelastic body

Claims (4)

A damping damper comprising a viscoelastic body sandwiched between a plurality of steel plates,
A first viscoelastic body sandwiched between a pair of first steel plates and a second steel plate provided in a fixed state between the first steel plates;
A friction mechanism is disposed between the pair of first steel plates and the second steel plates, and slides in parallel with the side surfaces of the second steel plates;
A second viscoelastic body sandwiched between a pair of third steel plates and the first steel plate provided to sandwich the pair of first steel plates;
Damping damper characterized in that is provided.   The damping damper according to claim 1, wherein the first viscoelastic body has a thickness dimension larger than that of the second viscoelastic body.   The damping damper according to claim 1 or 2, wherein the first viscoelastic body and the second viscoelastic body are different in kind.   4. The vibration damper according to claim 1, wherein the sliding mechanism slides when a predetermined load larger than a corresponding load is applied by the second viscoelastic body. 5.

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