JP2702088B2 - Seismic coupling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic coupling device.

[0002]

2. Description of the Related Art Conventionally, as an apparatus of this type, as shown in FIG. 8, for example, a telescopic sponge rubber r and a buffer pad s, a rustproof anchor plate t, a rustproof washer are attached to a PC steel rod q inserted into a concrete structure p. A connecting device in which u is fitted and tightened has been proposed. In the figure, v is a resin cap, and w is a reinforcing steel bar.

Further, a rubber cushioning material is attached to an end of the upper structure which is supported by the lower structure via a seismic isolation device, and which is opposed to a vertical rising portion of the lower structure. When the horizontal displacement occurs, the cushioning material collides with a vertical rising portion of the lower structure to cushion a horizontal force, and a rubber horizontal deformation buffering device has been proposed.

[0004]

However, the above-mentioned conventional device has a structure that allows two-dimensional displacement but cannot tolerate three-dimensional displacement, and also has a resistance constant that changes with the displacement. It was not something. The present invention has been proposed in view of such circumstances, and the object thereof is to provide a small displacement that acts constantly, with little resistance in the three axial directions, and the relative displacement between the coupling members. Displacement is allowed, and for large displacement due to seismic force, etc., resistance to suddenly increasing displacement acts, stopping the deformation between the joint members to the state before reaching the final failure state, the limit of easy repair An object of the present invention is to provide a seismic coupling device that can be kept deformed.

[0005]

In order to achieve the above-mentioned object, a seismic coupling device according to the present invention comprises three-dimensional braided elastic mesh bars, and anchors at both ends of the three-dimensional braided body. By connecting the members via the same anchor portion by the tubular connecting material provided with the portion, for a small displacement acting constantly, the mesh streaks of the three-dimensional braid are first loosened by loosening deformation. In order to respond almost without stress, and then to a large displacement due to seismic force or the like, the mesh bar can suppress deformation to the extent that it can be repaired between the connecting members until the elastic region and the plastic region and ultimate failure. It is configured.

According to a second aspect of the present invention, the mesh streaks are made of an insulative wire having a high tensile strength or a wire which has been subjected to rustproofing.

[0007]

According to the seismic coupling device of the present invention, as described above,
It is composed of a tubular binding material with anchors provided at both ends of a three-dimensional braid of stretchable mesh streaks. In this case, the three-dimensional braided body of the elastic mesh bars in the tubular bonding material is loosened to be loosened, so that it is almost stress-free, and exhibits almost a large resistance in the triaxial directions. Without the need for displacement in three axes.

Next, when a large displacement acts due to a large force due to seismic force or the like, the mesh streaks can be easily repaired later until a final destruction state is reached by the action of a counterforce against the magnitude of the suddenly increasing displacement. The deformation can be kept within the possible limits. According to the invention of claim 2, when the three-dimensional braid is used for the seismic coupling device, since the filaments constituting the braid generally require a rust-preventive effect, the material constituting the mesh is a stainless wire or It is used from rust-proof wire.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. A, B, and C are cylindrical binders, which are embedded at both ends of a braided body 2 formed by three-dimensionally braiding an elastic mesh bar 1 with a lead, zinc-based plastic material, or a steel ball resin. An anchor portion 3 made of a fixing body is integrally formed.

The physical properties of the tubular binders A, B, and C formed by three-dimensionally braiding the mesh streaks include the material constituting the mesh, the wire diameter, the number of stranded wires, and the number of strands. Is determined by appropriately selecting the twist angle β, the mesh angle α of the mesh, and the like. As described above, when used in an earthquake-resistant coupling device, rust prevention is generally required. Therefore, the material constituting the mesh is made of stainless steel wire or plastic or rubber suitable for ordinary steel wire. It is usual to apply a coating and to perform a rust prevention treatment.
Further, instead of steel, glass fiber or chemical tendon having a large tensile force may be used.

The mesh angles of the meshes are α _A , α _B , α _{C, respectively.}
The above-mentioned tubular binders A, B and C are used alone or
Alternatively, the tubular binder is used in the form of an A + B + C material in which the tubular binders A, B, and C are fitted concentrically, and an arcer portion at the end is used. The anchoring bolt 6 is inserted and tightened over the fixing ring 4 and the sole plate 5, and the tubular coupling material is mounted between the members via the anchoring bolt 6.

Further, for example, the anchor portion 3 of the tubular binder A
And the inclination angle are φ ₁ and tan α = 1/10, respectively, and the inclination angle is φ ₁ and φ ₂ , respectively, and the inclination angle is φ ₁ and φ ₂ , and tan α = 1/10, respectively. Binder A
The cylindrical bonding material B is fitted into the cylindrical bonding material B. Similarly, the cylindrical bonding material B is fitted into the cylindrical bonding material C.

FIG. 7A shows a state in which an axial force P is applied to the cylindrical binder A + B + C, and the length is L + ΔL. FIG. 7 (b) shows a state where an axial force P and a horizontal force T (T <P) are applied. In addition to the above, the cylindrical binder is B alone, A + B material, C alone or B + C
Also used in the form of lumber. 3 and 4 show a case where the present device is applied to a building and a bridge, and FIG. 3 shows a case where the present device is interposed between an upper building a and a lower foundation b. Shows a case where the present device is interposed between the bridge c and the pier d, in which e denotes a seismic isolation bearing, and f denotes a stopper.

FIG. 5 shows each of the tubular binders A, B, C, A +
The resistance constant of the B + C material is shown, the vertical axis shows the load P, and the horizontal axis shows the strain ΔL. As is clear from the above, each of the tubular binders A, B, C, and A + B + C has almost no resistance to a small displacement that constantly acts as shown in the left end of FIG. Allowing a large displacement in the three axial directions,
A constant resistance that increases against a large force due to seismic force or the like acts on the cylindrical coupling member, causing an elastic deformation in which the force P and the strain ΔL change linearly, and further increasing the displacement of the displacement. Due to the resistance force against the size, the cylindrical bonding material undergoes plastic deformation as shown on the right end side in FIG. 5 and is limited to a repairable limit before reaching the final fracture state between the bonding members. .

As described above, the seismic connection device allows a large deformation, and the seismic isolation bearing thereafter absorbs energy to release the force applied to the connection device.

[0016]

As described above, the seismic coupling device according to the present invention comprises a three-dimensional braided body formed by braiding elastic mesh bars three-dimensionally, with anchor portions provided at both ends of the three-dimensional braided member. And the members are connected via the anchor part, so that for small displacements that act constantly, the mesh streaks of the three-dimensional braid are loosened and loose with almost no stress. Correspondingly, elastic deformation occurs with the application of a large force such as seismic force, and then plastic deformation occurs, which can be suppressed to the limit of the restoration that can be repaired before reaching the final failure state between the coupling members In addition, the device of the present invention is used in combination with a bearing structure having a seismic isolation and vibration damping device to maintain the connection between the members constituting the structure without impairing the operation mode at all times. Easily when external force such as It is capable to keep the deformation of the recovery possible limits.

According to a second aspect of the present invention, the mesh streaks are made of a stainless steel wire having a large tensile strength and a wire which has been subjected to a remarkably anti-reflection treatment, thereby preventing the mesh streaks from rusting.
This can prevent performance degradation.

[Brief description of the drawings]

FIGS. 1 (a) and 1 (b) are longitudinal sectional views showing embodiments of a three-dimensional braid in an earthquake-resistant coupling device according to the present invention.

FIG. 2 is a longitudinal sectional view showing a mounting portion for a member of the three-dimensional braid.

FIG. 3 is a longitudinal sectional view showing an embodiment in which the present invention is applied to a building connecting device.

FIG. 4 is a longitudinal sectional view showing an embodiment in which the present invention is applied to a bridge connecting device.

FIG. 5 is a table showing experimental results of resistance constants of the tubular binder of the present invention.

FIGS. 6 (a), (b), (c), and (d) are longitudinal sectional views showing the cylindrical binder used in the experiment, and the member (d) shows a state at the time of attachment.

7 (a) and 7 (b) are longitudinal sectional views showing a state of loading the tubular binder shown in FIG. 6 (d).

FIG. 8 is a longitudinal sectional view showing an example of a conventional earthquake-resistant coupling device.

[Explanation of symbols]

 Reference Signs List A tubular binding material B tubular binding material C tubular binding material A + B + C material tubular binding material a building b foundation c bridge d pier e seismic isolation bearing f stopper 1 mesh streak 2 braided body 3 anchor part 4 fixing ring 5 sole Plate 6 anchor bolt

Claims (2)

(57) [Claims] An elastic mesh bar is braided three-dimensionally, and the three-dimensional braided members are connected to each other via cylindrical anchors provided with anchor portions at both ends thereof via the anchor portions. For small displacements acting constantly, the mesh streaks of the three-dimensional braided body are loosened and loosened, responding almost without stress. A seismic coupling device characterized in that the streaks are configured to be able to suppress the deformation of the coupling member between the elastic and plastic regions and the coupling member until the final destruction can be repaired. 2. The seismic coupling device according to claim 1, wherein said mesh streaks are made of an insulative wire having a high tensile strength or a wire which has been subjected to rustproofing.