JP2014066300A - Vibration damper for structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration damper for structure having anti-vibration function and air-cushion function capable of performing an axial accurate displacement and absorbing earthquake energy without showing any displacement of relative displacement of two members.SOLUTION: This vibration damper for structure comprises a rod body 3 extending within a cylinder body 2, arranged between the rod body and the cylinder body in such a way that they can be displaced relatively and formed with a guide hole 3b with a bottom extending axially from its extremity end by a prescribed length, a rubber body 9 fixed between an inner wall face of the cylinder and an outer peripheral face of the rod body to absorb vibration energy and a guide rod 5 having one end fixed to the end part of the cylinder and the other end formed at the rod body and being fitted and inserted into the guide hole with a bottom in a relative displacing manner. The guide rod fitted and inserted into the guide hole with bottom part prevents vibration when the rod body and the cylinder are displaced relatively in regard to the relative displacement of the cylinder and the rod body and at the same time, a sealed space present between the guide hole with bottom part and the extremity end of the guide rod may act as an air-cushion function.

Description

  The present invention relates to a vibration damper for a structure that suppresses vibrations of structures such as buildings and bridges during an earthquake, and in particular, can efficiently absorb seismic energy against a large displacement of the structure during an earthquake. The present invention relates to a vibration damper for a structure having a possible shake prevention and air cushion function.

  Oil dampers and viscoelastic dampers are known as damping dampers for structures.

Japanese Patent No. 2541073 Japanese Patent No. 2568833

  The conventional oil damper has a problem that the structure is complicated, the cost is high, and the number of maintenance such as inspection, repair, and parts replacement is large. A damping damper having a vibration absorbing function by deformation of an elastic body such as a viscoelastic damper has an advantage that the structure is simple and maintenance is easy. However, a large displacement with different directions acts on the structure during the earthquake, and the axial displacement of the cylinder member and the piston member each having one end fixed to the two structures where the structure is relatively displaced occurs. The load may concentrate on a part of the device and the device itself may be destroyed.

  The present invention solves the problems of the prior art, has a simple structure, and accurately displaces the two members in the axial direction without causing the relative displacement of the two members to move with great displacement in different directions during an earthquake. An object of the present invention is to provide a vibration damping damper for a structure having an anti-shake and air cushion function capable of absorbing seismic energy.

  In order to solve the above problems, the structural vibration damper of the present invention has a cylindrical body fixed to one structural body that is relatively displaced, and is fixed to the other structural body, and extends inside the cylindrical body. A rod body that is disposed so as to be capable of relative displacement with respect to the cylindrical body and has a bottomed guide hole extending in a predetermined length in the axial direction from the tip, and is fixed between the inner wall of the cylindrical body and the rod body. A rubber body that absorbs vibration energy, and a guide rod having one end fixed to the end of the cylindrical body and the other end inserted into a bottomed guide hole formed in the rod body so as to be relatively displaceable. With respect to the relative displacement between the cylindrical body and the rod body, the guide rod fitted into the bottomed guide hole prevents shaking when the rod body and the cylindrical body are relatively displaced, and the bottomed guide The air cushion machine has a sealed space between the hole and the tip of the guide rod. Characterized in that it play a.

  Further, the structural vibration damper of the present invention is characterized in that an elastic seal ring that is in sliding contact with the inner wall of the bottomed guide hole is attached to the outer peripheral portion of the tip of the guide rod.

  In the structural vibration damper of the present invention, a guide member that guides the relative displacement of the rod body is fixed to the other end of the cylindrical body.

  Moreover, the vibration damper for a structure according to the present invention is characterized in that the rubber body is a high-damping rubber.

  Moreover, the vibration damper for a structure of the present invention is characterized in that a plurality of rubber bodies are arranged at predetermined intervals in the axial direction.

  In the vibration damper for a structure of the present invention, the rubber body is fixed to the inner surface of the cylindrical body and the rod body by vulcanization integral molding.

A cylinder that is fixed to one structure that is relatively displaced, and a cylinder that is fixed to the other structure, extends inside the cylinder, and is disposed so as to be relatively displaceable between the cylinder and in the axial direction from the tip. A rod body having a bottomed guide hole extending a predetermined length; a rubber body that is fixed between the inner wall surface of the cylinder and the outer peripheral surface of the rod body; and one end at an end of the cylinder And a guide rod that is inserted into a bottomed guide hole formed in the rod body in such a manner that the other end can be relatively displaced, and the bottomed body with respect to the relative displacement between the cylindrical body and the rod body A guide rod inserted into the guide hole prevents shaking when the rod body and the cylinder are relatively displaced, and a sealed space existing between the bottomed guide hole and the tip of the guide rod is an air. Large displacement acting on the structure during an earthquake by fulfilling the cushion function On the other hand, the rubber body is elastically deformed by the relative displacement accurately in the axial direction without causing the cylinder and rod to shake, so it is possible to efficiently absorb the seismic energy without the load acting on some parts. Become. Moreover, it becomes possible to relieve the impact force accompanying the relative displacement by the compression and expansion of the air in the sealed space between the guide rod tip and the bottomed guide hole.
By attaching an elastic seal ring that is in sliding contact with the inner wall of the bottomed guide hole to the outer periphery of the guide rod tip, the sealing performance of the space between the bottomed guide hole and the guide rod tip can be improved, and the impact force relaxation performance can be improved. It becomes possible.
By fixing a guide member that guides the relative displacement of the rod body to the other end of the cylinder, it is possible to guide the relative displacement of the rod body at two locations, thereby further suppressing blurring due to the relative displacement. It becomes.
By making the rubber body a highly attenuating rubber, it is possible to improve the seismic energy absorption performance.
By disposing a plurality of rubber bodies at predetermined intervals in the axial direction, it becomes possible to dispose rubber bodies appropriately according to the damping performance.
Since the rubber body is fixed to the inner surface of the cylindrical body and the rod body by vulcanization integral molding, deterioration of the bonded portion between the steel material and the rubber is prevented, and it is possible to realize a long life of the rubber body.

It is a figure which shows embodiment of this invention. (A) (b) It is a figure which shows embodiment of this invention. (A) (b) (c) (d) It is a figure which shows embodiment of this invention. (A) (b) It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. (A) (b) It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. (A) (b) (c) It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention.

  The carrying of the vibration damper for a structure of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating an embodiment of a structure damping damper.

  The structure damping damper 1 includes a cylinder 2 connected to one structure of a structure such as a building or a bridge, and a rod 3 connected to the other structure. The cylindrical body 2 is a hollow member having a circular cross section, and an attachment member 4 for connection to one structure is fixed to one end thereof. As shown in FIGS. 2A and 2B, the attachment member 4 includes a clevis 4a for pin connection with one structure, a female screw formed on the inner peripheral surface of the end portion of the cylindrical body 2, and screwing. The fixing part 4c which formed the external thread 4b for doing on the outer periphery is provided. Further, the fixing portion 4c of the attachment member 4 is formed with a female screw hole 4d for screwing with a guide rod 5 having a male screw 5a formed at one end shown in FIG.

  As shown in FIGS. 4 (a) and 4 (b), a guide hole 6a is formed at the other end of the cylindrical body 2 to prevent the rod body 3 from shaking during relative displacement. The formed guide member 6 is screwed to a female screw portion formed inside the other end portion of the cylindrical body 2.

  The rod 3 extends inside the cylinder 2 through a guide member 6 having a guide hole 6 a fixed to the end of the cylinder 2, and is disposed so as to be relatively displaceable with the cylinder 2. As shown in FIG. 5, a male screw 3 a is formed at one end of the rod 3. The attachment member 7 for connecting to the other structure of the structure such as a building or a bridge shown in FIG. 6 is connected to the other structure via a plate-like connecting portion 7 a and a coupler 8. A fixing portion 7b in which an external thread 7c is formed on the outer periphery for connection with the rod 3 is provided. A male screw portion 3a formed at one end of the rod body 3 and a male screw portion 7c formed at the fixing portion 7b of the attachment member 7 are screwed to a coupler 8 having a female screw portion.

  A bottomed guide hole 3b extending in a predetermined length in the axial direction is formed at the other end of the rod 3. A guide rod 5 having one end screwed into a female screw hole 4d formed in a fixing portion 4c of a mounting member 4 fixed to one end of the cylindrical body 2 is fitted into the bottomed guide hole 3b so as to be relatively displaceable in the axial direction. Inserted. The cross-sectional shape of the guide rod 5 and the cross-sectional shape of the bottomed guide hole 3b are similar, and the outer diameter of the guide rod 5 and the inner diameter of the bottomed guide hole 3b are substantially the same. As a result, a sealed space filled with air is formed between the bottomed guide hole 3 b and the tip of the guide rod 5. As shown in FIGS. 3B, 3C, and 3D, by fixing an elastic seal ring 5b made of silicon rubber or the like in sliding contact with the inner wall surface of the bottomed guide hole 3b to the outer periphery of the tip of the guide rod 5, It becomes possible to improve the sealing performance of the space between the bottomed guide hole 3b and the tip of the guide rod 5.

  A rubber body 9 having a predetermined length is fixed in an annular space between the inner wall of the cylindrical body 2 and the outer periphery of the rod body 3. As the rubber body 9, natural rubber, high damping rubber or the like is used. The rubber body 9 is fixed to the inner wall surface of the cylindrical body 2 and the outer peripheral surface of the rod body 3 by vulcanization integral molding. By fixing the rubber body 9 by vulcanization integral molding, deterioration of the bonded portion between the steel material and the rubber can be prevented, and the life of the rubber body 9 can be extended.

  When a high-damping rubber is used as the rubber body 9, generally, the high-damping rubber material has strain dependency, frequency dependency, and temperature dependency. Appropriate materials are selected in order to exhibit vibration control performance adapted to such conditions.

  FIG. 7 is a view showing another embodiment of the structural vibration damper 1 of the present invention.

  This embodiment is different from the embodiment shown in FIG. 1 in that a plurality of rubber bodies 9 fixed to the inner peripheral surface of the cylindrical body 2 and the outer peripheral surface of the rod body 3 are arranged in the axial direction. . Other configurations are the same as those of the embodiment shown in FIG. Appropriate arrangement of the rubber bodies 9 having different properties such as temperature dependency of the plurality of rubber bodies 9 arranged in the axial direction makes it possible to expand application conditions.

  With reference to FIGS. 8A, 8B, and 8C, the operation of the structural vibration damper of the present invention will be described.

  FIG. 8A shows a case where the structural damping damper 1 is in an unloaded state and the cylinder 2 and the rod 3 are in the neutral position. In this state, the length of the sealed space formed between the bottomed guide hole 3b formed in the rod 3 and the tip of the guide rod 5 is L.

  FIG. 8B shows a state in which a large displacement acts on the structure during the earthquake, and the rod 3 is displaced in the direction of the arrow with respect to the cylinder 2. The rod 3 is accurately and relatively displaced in the axial direction without shaking due to the engagement between the guide member 6 fixed to the end of the cylinder 2 and the guide rod 5 and the bottomed guide hole 3b. In the state of FIG. 8 (b), a force in the tensile direction acts on the rod body 3, and the rubber body 9 is elastically deformed to absorb the seismic energy as shown in FIG. 8 (b). In this state, the length of the sealed space formed between the bottomed guide hole 3b formed in the rod 3 and the tip of the guide rod 5 is L1.

  FIG. 8C shows a state in which a large displacement acts on the structure during the earthquake, and the rod 3 is displaced in the direction of the arrow with respect to the cylinder 2. The rod 3 is accurately and relatively displaced in the axial direction without shaking due to the engagement between the guide member 6 fixed to the end of the cylinder 2 and the guide rod 5 and the bottomed guide hole 3b. In the state of FIG. 8C, a force in the compression direction acts on the rod body 3, and the rubber body 9 is elastically deformed to absorb the seismic energy as shown in FIG. 8C. In this state, the length of the sealed space formed between the bottomed guide hole 3b formed in the rod 3 and the tip of the guide rod 5 is L2.

  The length of the sealed space formed between the bottomed guide hole 3b and the tip of the guide rod 5 in the neutral state is L, and the rod body 3 in a state where a tensile force is applied to the rod body 3. The length of the sealed space formed between the bottomed guide hole 3b formed at the tip and the tip of the guide rod 5 is L1, and the rod 3 in a state where a force in the compression direction acts on the rod 3 The length of the sealed space formed between the bottomed guide hole 3b formed at the tip and the tip of the guide rod 5 is L1 <L <L2.

  For large displacements acting on the structure during an earthquake, the cylinder 2 and the rod 3 are accurately displaced relative to each other in the axial direction without shaking due to the engagement of the guide member 6, the guide rod 5, and the bottomed guide hole 3b. However, it is possible to elastically deform the rubber body 5 and absorb the seismic energy efficiently without applying a partial load.

  When a force in the tensile direction acts on the rod body 3 due to the relative displacement between the cylindrical body 2 and the rod body 3 due to a large displacement during an earthquake, the bottomed guide hole 3b formed in the rod body 3 and the guide rod 5 The length of the sealed space formed between the tip and the end L1 is longer than the length L of the space in the neutral state, and the air in the space expands and generates a negative pressure. A force in the direction opposite to the direction, that is, a force in a direction of pulling back the rod body 3 acts. In addition, when a force in the compression direction acts on the rod body 3 due to the relative displacement between the cylindrical body 2 and the rod body 3 due to a large displacement during an earthquake, the bottomed guide hole 3b and the guide rod formed in the rod body 3 The length L2 of the sealed space formed between the tip of the rod 5 is shorter than the length L of the space in the neutral state, and the air in the space is compressed to generate a repulsive force. A force in the direction of pushing back 3 acts. As a result, the impact force associated with the relative displacement between the cylinder 2 and the rod 3 due to the large displacement during the earthquake can be mitigated by the air in the sealed space.

  FIG. 9 shows an example in which the structure damping damper 1 of the present invention is used as a bridge. The structural damper 1 is arranged between the main girder 11 supported by the support device 12 on the abutment 10 and the abutment 10 to buffer the horizontal displacement acting on the main girder 11 at the time of an earthquake, and the main girder 11 and the abutment 10 Prevent destruction by collision.

  FIG. 10 shows an example in which the structural damping damper 1 of the present invention is installed between a pillar 14 and a beam 13 of a building. One end of the structural damping damper 1 is connected to a corner portion between the column 14 and the beam 13 via a gusset plate 15 and the other end is connected via a gusset plate 15 fixed to the upper beam 13. The structural damping damper 1 absorbs the energy against the displacement acting on the building during an earthquake and prevents the building from being destroyed.

  As described above, according to the vibration damper 1 for a structure of the present invention, the relative displacement in the axial direction can be accurately performed without causing the cylinder 2 and the rod 3 to move with respect to a large displacement acting on the structure during an earthquake. Since the rubber body 9 is elastically deformed, it is possible to efficiently absorb the seismic energy without a load acting on a part of the rubber body 9. Moreover, it becomes possible to relieve the impact force due to the relative displacement by the compression and expansion of the air in the sealed space between the tip of the guide rod 5 and the bottomed guide hole 3b.

  1: Damping damper for structure, 2: cylinder, 3: rod, 3a: male screw, 3b: guide hole with bottom, 4: mounting member, 4a: clevis, 4b: male screw, 4c: fixing part, 4d: Female screw hole, 5: guide rod, 5a: male screw, 5b: elastic seal ring, 6: guide member, 6a: guide hole, 7: mounting member, 7a: connecting part, 7b: fixing part, 7c: male screw, 8: coupler , 9: rubber body, 10: abutment, 11: main girder, 12: bearing device, 13: beam, 14: pillar, 15: gusset plate

Claims (6)

A cylindrical body fixed to one structure that is relatively displaced;
A rod body fixed to the other structure, extending inside the cylindrical body, disposed so as to be relatively displaceable with the cylindrical body, and having a bottomed guide hole extending a predetermined length in the axial direction from the tip; ,
A rubber body fixed between the inner wall surface of the cylindrical body and the outer peripheral surface of the rod body and absorbing vibration energy;
One end of the cylindrical body is fixed to one end, and the other end is inserted into the bottomed guide hole formed in the rod body so as to be relatively displaceable, and a guide rod;
With
With respect to the relative displacement between the cylindrical body and the rod body, the guide rod fitted into the bottomed guide hole prevents shaking when the rod body and the cylindrical body are relatively displaced, and the bottomed guide A damping damper for a structure, wherein a sealed space existing between the hole and the tip of the guide rod fulfills an air cushion function   2. The structural vibration damper according to claim 1, wherein an elastic seal ring that is in sliding contact with an inner wall of the bottomed guide hole is attached to an outer peripheral portion of a tip of the guide rod.   The structure damping damper according to claim 1 or 2, wherein a guide member for guiding the relative displacement of the rod body is fixed to the other end portion of the cylindrical body.   The structure damping damper for a structure according to any one of claims 1 to 3, wherein the rubber body is a high damping rubber.   The structural damper according to any one of claims 1 to 4, wherein a plurality of rubber bodies are arranged at predetermined intervals in the axial direction.   6. The structural vibration damper according to claim 1, wherein the rubber body is fixed to the inner surface of the cylindrical body and the rod body by vulcanization integral molding.

Images