JP2009068612A - Vibration control damper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration control damper capable of being manufactured inexpensively and capable of preventing a trouble such as breaking itself and breaking a structure around it by suppressing increase of load in the case that excessive load is applied by a major earthquake and the like of which installation location is not limited. <P>SOLUTION: The vibration control damper consists of a first member 2, second members 3, 3, viscoelastic bodies 4, 4 and the like. The second members 3, 3 and the viscoelastic bodies 4, 4 are adhered with an adhesive agent and, at an interface of the first member 2 and the viscoelastic bodies 4, 4, the viscoelastic bodies 4, 4 are adhered to a surface of the first member 2 by self adhesion. The adhesive strength per unit area by the adhesive agent is adjusted to be stronger than the self adhesion per unit area of the viscoelastic bodies 4, 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is incorporated in a structural framework in a building so that when external force such as wind or earthquake acts on a building such as a building or a house, the vibration energy is absorbed and the shaking motion and vibration of the building are attenuated. It relates to the damping damper used.

  In a building such as a house, a damping damper is installed diagonally in a frame frame formed of columns and horizontal members, and vibration energy is converted into thermal energy by the damping damper. A technique for absorbing vibration energy has been developed (Patent Document 1). As such a vibration damper, an oil damper, a viscous damper, a steel damper, a friction damper, and the like have been put into practical use.

When vibration is generated due to an earthquake or the like in the frame frame where the damping damper is installed, the restoring force characteristic curve (displacement-load curve) of the damping damper becomes an ellipse as indicated by R ₁ in FIG. In addition, the large earthquake like scale, when the load applied to the vibration control damper becomes large, restoring force characteristic curve becomes large ellipse as R _2. As a result, the load applied to the surrounding structural members such as the fixing member fixing the damping damper and the beam fixing the frame frame in the frame frame becomes excessive, exceeding the fracture limit C, There is a situation in which the damping damper itself is broken or the surrounding structural members are damaged.

  Therefore, as a damping damper for correcting such a malfunction, as in Patent Document 2, a first damper that attenuates vibration (for example, an oil damper) and a load applied to the first damper are a certain value or more. A damping damper has been developed in which a second damper (for example, a friction damper) is connected in series to block transmission of the load to the first damper.

Japanese Patent Laid-Open No. 2002-213531 JP-A-9-268802

  However, the damping damper as in Patent Document 2 cannot be manufactured at a low cost because of its complicated structure. Moreover, in order to make a 1st damper and a 2nd damper express sufficient function, it must be a big thing and there exists a malfunction that the place where it installs is limited.

  The object of the present invention is to solve the above-mentioned problems of the conventional damping damper, can be manufactured at a low cost, and the installation location is not limited. In addition to being able to attenuate, when an excessive load is applied due to a large-scale earthquake, etc., it functions as a friction damper, preventing an increase in load and preventing a situation where it breaks or damages surrounding structural members The object is to provide a practical damping damper that is safe and has high safety and does not cost repair or replacement.

  Among the present inventions, the invention described in claim 1 includes a first member, a second member that is arranged in the same straight line as the first member and partially overlaps, and a polymerization of these two members. A damping damper that comprises a viscoelastic body installed between the portions, and causes a damping action by shearing the viscoelastic body by movement in the opposite direction of the first member and the second member. In either of the interface between the first member and the viscoelastic body, or the interface between the second member and the viscoelastic body, the surface of the member and the viscoelastic body are bonded by an adhesive. In addition, at the other interface, the surface of the member and the viscoelastic body are not adhered by an adhesive, and the viscoelastic body is adhered to the surface of the member by self-adhesive force. It is what.

  The invention described in claim 2 is characterized in that, in the invention described in claim 1, the adhesive force per unit area by the adhesive is larger than the self-adhesive force per unit area of the viscoelastic body. Is.

The invention described in claim 3, in the invention described in claim 1 or claim 2, that the self-adhesive strength of the viscoelastic body is adjusted to 5N / cm ² or more 50 N / cm ² or less It is a feature.

  The invention described in claim 4 is the invention described in any one of claims 1 to 3, wherein the shear strength of the interface bonded by the adhesive is larger than the shear resistance of the viscoelastic body. It is a feature.

  The invention described in claim 5 is the invention described in any one of claims 1 to 4, wherein the viscoelastic body is a styrene-based elastomer or a diene-based elastomer.

  The invention described in claim 6 is characterized in that in the invention described in any one of claims 1 to 5, an epoxy resin paint is applied to the first member and the second member. .

[Action]
The damping damper (viscoelastic damper) of the present invention is a relative position at the interface between the member and the viscoelastic body when a load less than the self-adhesive force of the viscoelastic body is applied due to an earthquake or the like in the structural framework. Therefore, the vibrational energy is converted into thermal energy by shear deformation of the viscoelastic body. In addition, when a large load exceeding the self-adhesive force of the viscoelastic body is applied, the member resists the self-adhesive force of the viscoelastic body at the non-adhesive interface (adhesive interface) between the member and the viscoelastic body. Slide out the surface of the elastic body. Therefore, the restoring force characteristic curve of the damping damper of the present invention is as shown in FIG. 1, and compared with the conventional damping damper (all the interfaces between the member and the viscoelastic body are bonded) The maximum value (that is, C in FIG. 1, hereinafter referred to as a threshold) is low.

Therefore, when the magnitude of the applied load does not reach the threshold value C (for example, when the restoring force characteristic curve is obtained as R ₁ ), the viscoelastic body has vibration energy (the area surrounded by the restoring force characteristic curve R _1). Is absorbed by converting it into thermal energy. When the applied load exceeds the threshold C (for example, when the restoring force characteristic curve is obtained as R ₂ ), the member absorbs vibration energy by sliding on the surface of the viscoelastic body, and the load Suppress the increase.

  Therefore, when the damping damper is installed in the structural frame, it exceeds the breaking limit force of the damping damper itself and the breaking limit force of the structural members (fixed members, columns, beams, etc.) around the damping damper. By setting the load threshold value C so that there is no damage, it is possible to prevent damage to the damping damper itself and surrounding structural members.

  When a load (a load less than a threshold value) is applied, the vibration damping damper according to the first aspect can absorb vibration energy and attenuate the vibration by shear deformation of the viscoelastic body. Further, when a load of a predetermined amount or more (a load exceeding a threshold value) is applied, the member slides on the contact surface with the viscoelastic body at the non-adhesive interface between the surface of one member and the viscoelastic body. Thus, it functions as a friction damper, and it is possible to prevent a situation in which it is damaged by an excessive load or a surrounding structural member is damaged. Therefore, according to the seismic damper according to the first aspect, it is not necessary to repair and replace itself and the surrounding structural members, so that maintenance costs and labor can be reduced. In addition, by setting the threshold value of the load arbitrarily, a sufficient seismic control effect can be exhibited while ensuring safety. On the other hand, since the interface between the surface of the other member and the viscoelastic body is firmly bonded with the adhesive, the function of damping the vibration can be stably expressed any number of times.

  In the vibration damping damper according to claim 2, since the adhesive force per unit area by the adhesive is larger than the self-adhesive force per unit area of the viscoelastic body, the non-adhesion between the surface of one member and the viscoelastic body Before the member slides on the contact surface with the viscoelastic body at the interface, a situation in which adhesion failure occurs at the adhesive interface between the surface of the other member and the viscoelastic body does not occur. Therefore, the reliability of the function as a vibration control damper is high.

Seismic Damper according to claim 3, since the self-adhesive strength of the viscoelastic body is adjusted to below 5N / cm ² or more 50 N / cm ^2, only very low shaking occurs, of one of the members Despite the fact that the member slides on the contact surface with the viscoelastic body at the non-adhesive interface between the surface and the viscoelastic body, or the strong shaking occurs, the member moves on the contact surface with the viscoelastic body. Since it does not slide, an excessive load is not applied.

  In the damping damper according to claim 4, since the shear resistance strength of the interface bonded by the adhesive is larger than the shear resistance strength of the viscoelastic body, when the vibration occurs, the viscoelastic body depends on the shear strength. Before the breakage occurs, an adhesive failure occurs at the bonding interface between the surface of the vibration control member and the viscoelastic body, and the vibration control member does not slide on the contact surface with the viscoelastic body. Therefore, the function of attenuating vibration energy can be stably expressed.

  In the vibration damping damper according to claim 5, since the viscoelastic body is a styrene-based elastomer or a diene-based elastomer, the temperature dependency (0 to 40 ° C.) is small, and the spring and damping change and self-adhesive force change are small. There are few and adjustment is easy. Therefore, it is easy to adjust the self-adhesive force of the viscoelastic body with respect to the first member and the second member.

  In the vibration damping damper according to claim 6, since the epoxy resin paint is applied to the first member and the second member, the surface state becomes uniform (stabilized), and the viscoelasticity with respect to the first member and the second member It is very easy to adjust the self-adhesion of the body.

  Hereinafter, an embodiment of a vibration damper according to the present invention will be described with reference to the drawings.

[Structure of vibration control damper]
Fig.2 (a) shows the front of the damping damper (viscoelastic damper) based on this invention, FIG.2 (b) shows the side surface of the damping damper. The damping damper 1 includes a first member 2, second members 3 and 3 disposed outside the first member 2, and a viscoelastic body 4 attached between the first member 2 and the second members 3 and 3. , 4 etc.

  The first member 2 is formed of a steel plate into a rectangular plate shape, and has a size of length × width × height (thickness) = 150 mm × 80 mm × 9 mm. The surface of the first member 2 is coated with an epoxy resin by cationic electrodeposition coating. On the other hand, the second member 3 is formed in the same shape as the first member 2 by a steel plate similar to the first member 2. Furthermore, the surface of the second member 3 is coated with an epoxy resin by cationic electrodeposition similarly to the first member 2. The viscoelastic body 4 is formed in a rectangular plate shape from a styrene-based elastomer, and has a size of length × width × height (thickness) = 75 mm × 75 mm × 5 mm.

  The damping damper 1 has viscoelastic bodies 4, 4 adhered to the front and back of the left part of the first member 2 (adhered by the self-adhesive force of the viscoelastic bodies 4, 4). , 4 are bonded to the second members 3 and 3 side with an adhesive (rubber glue; natural rubber or synthetic rubber dissolved in an organic solvent) 7 respectively. It is assembled integrally by. Then, two second members 3 and 3 are laminated above and below the left part of the first member 2, approximately the center of the laminated portion of the first member 2 and the upper second member 3, and The viscoelastic bodies 4 and 4 are interposed in the approximate centers of the laminated portions of the first member 2 and the lower second member 3, respectively.

In the vibration damper 1, the adhesive strength at the interface between the surface of the first member 2 and the viscoelastic bodies 4, 4 is adjusted to 20 N / cm ² , and the surface of the second members 3, 3 is viscoelastic. The adhesive strength at the interface with the bodies 4 and 4 is adjusted to 50 N / cm ² or more and below the adhesive breaking strength. In addition, in the vibration damper 1, the shear strength of the interface bonded by the adhesive (that is, the maximum shear strength that does not cause bond failure when a shear stress is applied at the bonded interface) is 50 N / cm ^2. The shear strength of each of the viscoelastic bodies 4 and 4 (ie, the maximum shear strength at which the viscoelastic body 4 is not damaged when a shear stress is applied to the viscoelastic body 4) ) Is adjusted to 50 N / cm ² or more and below the adhesive breaking strength.

[Performance of vibration control damper]
The damping damper 1 configured as described above was deformed in the horizontal direction, and the restoring force characteristic curve (displacement-load curve) at that time was measured. For comparison, a damping damper is formed in which all interfaces between the member (first member and second member) and the viscoelastic body are bonded with an adhesive, and the damping damper is horizontally aligned under the same conditions. The restoring force characteristic curve was also measured when deformed. The measurement results are shown in FIG. From FIG. 3, it can be seen that the maximum value (threshold value) of the load can be reduced according to the damping damper 1 in which the interface between the second member 3 and the viscoelastic bodies 4 and 4 is not bonded.

[Change example of seismic damper]
The structure of the vibration damper of the present invention is not limited to the aspect of the above-described embodiment, and the structure of the member (first member, second member), viscoelastic body, adhesive material, shape, structure, etc. Can be appropriately changed without departing from the gist of the present invention.

  For example, the damping damper is not limited to the rectangular plate-shaped second member laminated on both the front and back sides of the rectangular plate-shaped first member as in the above embodiment, As shown in FIG. 4, the outer periphery of a hollow quadrangular prism-shaped first member 2 ′ is covered with a hollow quadrangular prism-shaped second member 3 ′, and a viscoelastic body 4 ′ is interposed between these members. As shown in FIG. 5, the outer periphery of the small-diameter cylindrical first member 2 ″ is covered with the large-diameter cylindrical second member 3 ″, and the viscoelastic body 4 ″ is interposed between these members. (It is noted that FIG. 6 shows a cross section along the longitudinal direction of the damping damper 1 ′ in FIG. 4 and the damping damper 1 ″ in FIG. 5). In addition, when the damping damper is a laminate of rectangular plate-like second members with viscoelastic bodies interposed between the front and back sides of the rectangular plate-like first member as in the above embodiment It is also possible to use a screw or the like to keep the interval between the second members at a predetermined interval.

  Further, as in the above-described embodiment, the vibration damping damper adheres between the first member and the viscoelastic body by the self-adhesive force of the viscoelastic body and adheres between the second member and the viscoelastic body. Without being limited, as shown in FIG. 7, the first member 2 and the viscoelastic bodies 4, 4 are bonded with an adhesive 7, and the second member 3 and the viscoelastic bodies 4, 4 are bonded together. , 4 can be changed to those adhered by the self-adhesive force.

  Moreover, a member is not limited to what was formed with the steel plate, It is also possible to change into what was formed with other metals, such as stainless steel and aluminum. In addition, when a steel member such as the above embodiment is used, a cationic electrodeposition coating or hot-dip galvanizing treatment by applying an epoxy resin coating is performed so that the member does not rust, and a long period of time can be obtained. The performance will not change. In addition, since the surface state is made uniform (stabilized), the surface friction force becomes constant, so that the self-adhesion force of the viscoelastic body to the vibration control member can be easily adjusted.

  On the other hand, the material of the viscoelastic body interposed between the first member and the second member is not limited to styrene elastomers, but may be changed to other urethane elastomers, acrylic elastomers, synthetic rubbers, natural rubbers, etc. Is also possible. In addition, the adhesive that bonds the member and the viscoelastic body is not limited to the rubber paste, and can be appropriately changed according to the material of the viscoelastic body.

It is explanatory drawing which shows the restoring force characteristic curve of the damping damper regarding this invention. It is explanatory drawing which shows the damping damper of an Example (a is a front view, b is a side view). It is explanatory drawing which shows the restoring force characteristic curve of the damping damper of an Example. It is explanatory drawing (side view) which shows the example of a change of a damping damper. It is explanatory drawing (side view) which shows the example of a change of a damping damper. It is explanatory drawing (sectional drawing) which shows the example of a change of a damping damper. It is explanatory drawing (side view) which shows the example of a change of a damping damper. It is explanatory drawing which shows the restoring force characteristic curve of the conventional damping damper.

Explanation of symbols

1 .... Damping damper 2 .... First member 3 .... Second member 4 .... Viscoelastic body 7 .... Adhesive

Claims (6)

A first member, a second member arranged in the same straight line as the first member and partially overlapping, and a viscoelastic body installed between the overlapping portions of the two members, A damping damper that causes a damping action by shearing and deforming the viscoelastic body by a reciprocal movement between one member and the second member,
In any one of the interface between the first member and the viscoelastic body or the interface between the second member and the viscoelastic body, the surface of the member and the viscoelastic body are bonded by an adhesive. And
At the other interface, the vibration damper is characterized in that the surface of the member and the viscoelastic body are not adhered by an adhesive, and the viscoelastic body is adhered to the surface of the member by self-adhesive force. .   The damping damper according to claim 1, wherein an adhesive force per unit area by the adhesive is larger than a self-adhesive force per unit area of the viscoelastic body. Seismic Damper according to claim 1 or claim 2, the self-adhesive strength of the viscoelastic body is characterized in that it is adjusted to below 5N / cm ² or more 50 N / cm ^2.   The damping damper according to any one of claims 1 to 3, wherein the shear resistance strength of the interface bonded by the adhesive is larger than the shear resistance strength of the viscoelastic body.   The damping damper according to any one of claims 1 to 4, wherein the viscoelastic body is a styrene elastomer or a diene elastomer.   The damping damper according to any one of claims 1 to 5, wherein an epoxy resin paint is applied to the first member and the second member.

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