JP5408672B2 - High bearing support system for structures - Google Patents

Description

  The present invention is provided between a superstructure and a substructure of a structure such as a bridge or a building, and absorbs and attenuates seismic energy that has acted during an earthquake to suppress shaking of the superstructure. It relates to a bearing device.

  Conventionally, for structures such as bridges and high-rise buildings, rubber bearings (reactive force dispersion bearings, exemptions) are used between the upper structure and the lower structure, such as between the main girder and main structure and the abutment and pier, between the building and the foundation. Seismic support etc.).

  As a rubber bearing, there is a structure in which a rubber material (elastic body) such as high damping rubber and a steel plate (stiffening body) are alternately laminated in the vertical direction. In such a support device, the upper structure can be supported because the spring is made high with respect to the vertical load by the rubber material and the steel plate. In addition, since the spring is reduced so that the rubber material deforms in the horizontal direction against the horizontal load, a large external force (earthquake energy) acts in the horizontal direction during an earthquake and the rubber material deforms in the horizontal direction. Seismic energy is absorbed by deformation of the material.

  On the other hand, there is a rubber material in which a woven fabric or a non-woven fabric (fiber material) is laminated and embedded so as to alternate with a rubber material (see, for example, Patent Document 1 and Patent Document 2). In such a support device, when a vertical load of a certain value or more is applied, the fiber material breaks to exhibit an energy absorption effect and suppress the occurrence of impact load in the vertical direction (vertical direction, stacking direction). be able to. In addition, when a horizontal load of a certain value or more acts, the energy absorbing effect is exhibited by peeling the interface between the fiber material and the rubber material.

JP-A-10-140524 JP 2001-49619 A

  However, the conventional bearing device constructed by alternately laminating the rubber material and steel plate absorbs the seismic energy (horizontal load) applied during the earthquake only by the horizontal deformation of the rubber material and exhibits a damping effect. In addition, since the damping effect is exhibited only after a deformation exceeding a certain value occurs, the amount of horizontal deformation of the seismic isolation device (rubber material) is large, and the amount of horizontal displacement of the superstructure is large. That is, this type of seismic isolation device is, for example, approximately 150% of the thickness of rubber material at the time of level 1 ground motion (earth motion with a probability of occurring once or twice during the service period of the structure), level 2 ground motion ( A horizontal displacement of about 250% of the thickness of the rubber material occurs during an earthquake of extremely rare but very strong earthquake motion. For this reason, when this support device is interposed between the main girder (main structure) of the bridge and the abutment, for example, the main girder is greatly displaced in the horizontal direction along with the displacement of the support device (deformation of the rubber material) during an earthquake. Therefore, it was necessary to set a large gap between the end of the main girder and the abutment. Along with this, there is a problem that a joint structure such as a large finger joint is required and the cost of the joint structure is increased.

  On the other hand, in the bearing device that is constructed by horizontally laying and embedding fiber materials in the above-mentioned conventional rubber material, the interface between the fiber material and the rubber material exfoliates the seismic energy (horizontal load) that has acted at the time of the earthquake. In order to absorb and exhibit a damping effect, the horizontal deformation amount of the rubber material and thus the horizontal displacement amount of the superstructure can be controlled. However, when the seismic energy is attenuated by such a separation of the fiber material and the rubber material, the effect as great as the attenuation effect due to the breakage of the fiber material cannot be expected. For example, for level 1 earthquake motion or level 2 earthquake motion, Again, the amount of horizontal deformation of the rubber material and thus the amount of horizontal displacement of the superstructure cannot be controlled sufficiently.

  The present invention can be manufactured at a low cost, can restrain deformation to the outside in the horizontal direction against a large compressive load and can exert a high support pressure, and exhibits an excellent seismic energy damping effect. An object of the present invention is to provide a high bearing support device for a structure capable of suppressing the shaking of the structure.

In order to solve the above-mentioned problem, a high bearing support device for a structure according to the present invention is a column-like structure between upper and lower steel plates in a high bearing support device for a structure installed between an upper structure and a lower structure of the structure. A plurality of concentric or spiral fibers arranged parallel to the direction of compressive load acting on the rubber body, and a fiber member located outside the rubber body. It is characterized by being arranged in a concave shape toward the inside .

  Further, in the high bearing support device for a structure of the present invention, the fiber member may be a plurality of times in which a fiber or fiber-like fiber impregnated or coated with rubber or a resin excellent in damping property is wound a plurality of times. It is characterized by being formed by laminating a plurality of sheets.

  Moreover, the high bearing support device for a structure of the present invention is characterized in that a core material in which a plurality of hard resin plates and rubber are laminated in the horizontal direction is arranged at the center of the rubber body.

  Moreover, the high bearing support apparatus for structures of this invention is characterized by extending the arrangement | positioning area | region of the said rubber body and the said fiber member to the outer periphery outer side position of the said upper and lower steel plates.

  Moreover, the high bearing support device for structures of the present invention is characterized in that the upper and lower steel plates, the rubber body, and the fiber member are integrated by vulcanization integral molding.

In a high bearing support device for a structure installed between an upper structure and a lower structure of a structure, a columnar rubber body is disposed between upper and lower steel plates, and a fiber member acts on the rubber body in the rubber body. A plurality of concentric circles or spirals are arranged in a plurality of concentric circles or spirals parallel to the load direction, and are arranged in a shape in which the fiber members located outside the rubber body are recessed inward. It is possible to constrain the large deformation of the rubber body in the horizontal direction due to the vertical compressive load by the fiber member arranged in the shape of the rubber body, it is possible to realize a high support pressure load bearing action, due to the large compressive load It is possible to suppress large deformation of the rubber body toward the outside in the horizontal direction.
The fiber member is formed by winding a rubber-like fiber material impregnated or coated with rubber or a resin excellent in damping property into a sheet shape, or by wrapping the rubber body a plurality of times or by laminating a plurality of sheets. The fiber body can be easily integrated with the rubber body, the rubber body and the fiber member can be firmly integrated, and the force that restrains the deformation of the rubber in the horizontal direction due to the compressive load can be increased. Become.
By placing a core material in which multiple layers of hard resin plates and rubber are stacked horizontally in the center of the rubber body, the core material is made highly rigid, making the rubber body more springy and exhibiting higher support pressure. Is possible.
By extending the arrangement region of the rubber body and the fiber member to the outer peripheral position of the upper and lower steel plates, it is possible to further strengthen the integration of the upper and lower steel plates, the rubber body, and the fiber member.
By integrating the upper and lower steel plates, the rubber body, and the fiber member by vulcanization integral molding, it becomes possible to strengthen the integration of the upper and lower steel plates, the rubber body, and the fiber member.

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

  Embodiments of the present invention will be described with reference to the drawings. Fig.1 (a) (b) is a figure which shows one Embodiment of the high bearing support apparatus 1 for structures of this invention.

  In a structure support device 1 installed between an upper structure and a lower structure of a structure such as a bridge or a building, a columnar rubber body 2 made of natural rubber or high damping rubber is disposed between upper and lower steel plates 4 and 5. Is done. In the columnar rubber body 2, a plurality of annular fiber members 3a, 3b, 3c are arranged concentrically around the center rubber 2a with the plurality of annular rubbers 2b, 2c interposed therebetween. The fiber members 3a, 3b, 3c are arranged in parallel to the vertical compressive load direction received by the structure bearing device 1. The fiber member 3 is arranged with a length substantially the same as or slightly shorter than the length of the rubber body 2 in the axial direction.

  The fiber member 3 is made of carbon fiber, glass fiber, polyamide fiber, vinylon fiber, vinyl fiber, steel fiber or the like as the fiber material 6. 5 shows a plurality of thread-like fiber materials 6 arranged in the longitudinal direction, FIG. 6 shows a plurality of thread-like fiber materials 6 arranged in the transverse direction, and FIG. 7 shows a fiber material 6 in the longitudinal direction. The fabric material 6 is woven or knitted in the transverse direction to form a cloth shape or a net shape. The fiber material 6 arranged as shown in FIGS. 5 to 7 is impregnated or coated with a base material 7 made of natural rubber or a resin having excellent damping properties to form a sheet. A plurality of sheet-like fiber materials 6 are wound around the center rubber 2a and the annular rubbers 2b and 2c, and a plurality of fiber members 3 having a predetermined thickness in the radial direction are arranged concentrically.

  As shown in FIG. 5 and FIG. 6, in the case of a sheet in which the fiber material 6 is arranged in one vertical and horizontal direction, when a plurality of windings are wound around the center rubber 2 a and the annular rubbers 2 b and 2 c, the fiber material 7 is vertically Increasing the restraining force for restraining the deformation to the outside in the horizontal direction due to the compression load of rubber by forming the fiber member 3 by alternately winding the one arranged in the direction and the one arranged in the lateral direction Is possible.

  An upper steel plate 4 and a lower steel plate 5 are arranged above and below a columnar rubber body 2 in which a plurality of fiber members 3 are arranged concentrically. The fiber member 3c and the annular rubber body 2d are disposed up to the outer peripheral positions of the upper steel plate 4 and the lower steel plate 5. As a result, the upper steel plate 4 and the lower steel plate 5 are disposed so that the outer peripheral surface portion and the back surface or the upper surface are in contact with the rubber body 2 or the fiber member 3. The upper and lower steel plates 4 and 5, the rubber body 2, and the fiber member 3 can be firmly integrated by vulcanizing and integrally forming the upper and lower steel plates 4 and 5, the rubber body 2, and the fiber member 3 arranged in this way. It becomes.

In the embodiment shown in FIGS. 1A and 1B, the number of annular fiber members 3a, 3b, 3c arranged concentrically is three rows, but the radial thickness of the annular fiber member 3 is reduced. Then, more rows of annular fiber members 3 may be arranged.

  In the structure high bearing support device 1 of this embodiment, a plurality of annular fiber members 3a, 3b, 3c are integrated with annular rubbers 2b, 2c, 2d concentrically in a columnar rubber body 2. Therefore, deformation of the rubber body 2 toward the outside in the horizontal direction due to the compressive load in the vertical direction is restrained by the annular fiber members 3a, 3b, and 3c, and a high supporting pressure can be exerted.

  2 (a) and 2 (b) are diagrams showing another embodiment of the high bearing support device 1 for a structure according to the present invention.

  The structural high bearing support device 1 of this embodiment forms a core material 9 by horizontally laminating a plurality of hard resin plates 8 such as ebonite and laminated rubber 2 f at the center of a rubber body 2. In the columnar rubber body 2, a plurality of annular fiber members 3a, 3b, 3c are arranged concentrically with the plurality of annular rubbers 2b, 2c interposed therebetween. The fiber members 3a, 3b, 3c are arranged in parallel to the vertical compressive load direction received by the structure bearing device 1. The fiber member 3 is arranged with a length substantially the same as or slightly shorter than the length of the rubber body 2 in the axial direction.

  Other configurations are the same as those of the embodiment shown in FIGS. In this embodiment, since the core material 9 is formed by horizontally laminating a plurality of hard resin plates 8 and laminated rubber 2f, the rigidity of the core material 9 is large, and the spring is made high against a vertical compressive load. In addition, a plurality of annular fiber members 3a, 3b, 3c arranged in the columnar rubber body 2 can exert a large high supporting pressure in cooperation with the restraining force against the deformation of the rubber body 2 toward the outside in the horizontal direction. It becomes possible.

  3 (a) and 3 (b) are diagrams showing another embodiment of the high bearing support device 1 for a structure according to the present invention.

  As in the embodiment shown in FIGS. 1 (a) and 1 (b), the structure high bearing support device 1 of this embodiment has a plurality of annular members around the center rubber 2a in the columnar rubber body 2. The fiber members 3a, 3b, 3c, and 3d are arranged concentrically with a plurality of annular rubbers 2b, 2c, and 2d interposed therebetween. The intermediate portions in the axial direction of the annular fiber members 3 c and 3 d located outside the columnar rubber body 2 are arranged in a state of being recessed toward the center of the rubber body 2. Other configurations are the same as those of the embodiment shown in FIGS.

  The annular fiber members 3c and 3d located outside the columnar rubber body 2 are recessed in advance in the opposite direction in which the rubber body 2 is deformed by the compressive load, so that the rubber body 2 due to the compressive load is moved outward in the horizontal direction. The restraining force that restrains the deformation of the material increases, and a high bearing pressure can be achieved.

  4 (a) and 4 (b) are views showing another embodiment of the high bearing support device 1 for a structure of the present invention.

  In the high bearing support device for a structure 1 of this embodiment, a fiber member 3a is spirally arranged in a columnar rubber body 2 with a center rubber 2a as a center toward the outside of the rubber body 2. An annular fiber member 3b is arranged outside the member 3a on a spirally arranged line. Other configurations are the same as those of the embodiment shown in FIGS.

  In the columnar rubber body 2, the fiber member 3 a is arranged spirally around the center rubber 2 a toward the outside of the rubber body 2, so that the rubber body 2 is deformed outward in the horizontal direction by a compressive load in the vertical direction. Is restrained and a high supporting pressure can be exerted.

  As described above, according to the high bearing support device for a structure of the present invention, it is possible to constrain deformation to the outside in the horizontal direction against a large compressive load and exhibit high bearing pressure, and excellent seismic energy. It is possible to provide a high bearing support device for a structure that can exhibit the damping effect of the above and can suppress the shaking of the superstructure.

  1: High bearing support device for structure, 2: rubber body, 2a: center rubber body, 2b, 2c, 2d, 2e: annular rubber body, 2f: laminated rubber body, 3: fiber member, 3a, 3b, 3c 3e: annular fiber member, 4: upper steel plate, 5: lower steel plate, 6: fiber material, 7: base material, 8: hard resin plate, 9: core material

Claims (5)

In the high bearing support device for a structure installed between the upper structure and the lower structure of the structure,
A columnar rubber body is disposed between the upper and lower steel plates, and a fiber member is disposed in the rubber body in a plurality of concentric or spiral shapes parallel to the direction of compressive load acting on the rubber body, on the outside of the rubber body. A high bearing support device for a structure, wherein the fiber member located is arranged in a concave shape toward the inside .   2. The fiber member is formed by winding or laminating a plurality of yarn-like or cloth-like fibers impregnated or coated with rubber or a resin excellent in damping property into a sheet shape. High bearing support device for structures as described in 1. The high bearing support device for a structure according to claim 1 or 2 , wherein a core material in which a plurality of hard resin plates and rubber are laminated in a horizontal direction is disposed at a central portion of the rubber body. The high bearing support device for a structure according to any one of claims 1 to 3 , wherein an arrangement region of the rubber body and the fiber member is extended to an outer peripheral position of the upper and lower steel plates.   The high bearing support device for a structure according to any one of claims 1 to 4, wherein the upper and lower steel plates, the rubber body, and the fiber member are integrated by vulcanization integral molding.

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