Seismic isolation bearing with multiple energy dissipation characteristics

Abstract

The present invention relates to a seismic isolation bearing with multiple energy dissipation characteristics. It comprises a connecting plate, a rubber bearing, a cylindrical friction damper, a force transmission rod, and a spring glass bead. The rubber bearing is fixedly connected to the upper and lower connecting plates by bolts. The connecting plate is provided with an arc groove and a hole. The cylindrical friction damper is embedded in the hole. The cylindrical friction dampers in the upper and lower connecting plates are arranged in a cross shape. The inner tube ends of the cylindrical friction damper are respectively vertically connected to the force transmission rod. The top of the force transmission rod is connected to a spring glass bead adapted to the arc groove on the corresponding connecting plate. When the rubber bearing undergoes shear displacement, the arc groove on the connecting plate moves to clamp the spring glass bead and drive the cylindrical friction damper to move together through the force transmission rod. The cylindrical friction damper exerts a damping effect. When the rubber bearing is restored to its initial position from deformation, the spring glass bead will automatically disengage from the arc groove. The present invention has a simple structure, is easy to install, and has a strong energy dissipation capacity.

Description

Technical Field

[0001] The invention relates to the technical field of earthquake isolation of building engineering, in particular to an earthquake isolation bearing with multiple energy dissipation characteristics. Background Art

[0002] Rubber bearing isolation technology is currently a relatively mature isolation technology. Since natural rubber bearings have a very low energy absorption capacity, it is easy to cause excessive displacement of the isolation layer. Generally, it needs to be used in conjunction with lead core rubber bearings or dampers.

[0003] The lead core contained in the lead rubber bearing will cause harm to the environment, and the installation of the damper requires space and has high construction requirements. To avoid these unfavorable conditions, a composite device of the isolation bearing and the damper (combined bearing) can be installed in the isolation layer, resulting in a larger net space distance between the isolation part and the non-isolation part of the building, resulting in a larger space and increased cost. The existing combined bearing adds energy-absorbing elements to the periphery of the rubber bearing, such as the U-shaped damper rubber bearing. Although it can effectively increase the energy absorption capacity of the bearing, it is larger in size. Summary of the invention

[0004] The present invention aims to solve the above problems, thereby providing a seismic isolation bearing with multiple energy dissipation characteristics that solves the problem of weak energy dissipation capacity of rubber seismic isolation bearings and large deformation of seismic isolation layers, and has a simple structure, convenient installation, strong energy dissipation capacity. Its basic feature is that the energy dissipation element is embedded in the steel plate to move with the rubber, thereby improving the energy dissipation capacity of the rubber bearing, reducing the deformation of the seismic isolation layer of the seismic isolation building, and making the application range of seismic isolation technology more extensive.

[0005] The present invention solves the above-mentioned problem by adopting the following technical solution:

[0006] The invention discloses a seismic isolation bearing with multiple energy dissipation characteristics, comprising a connecting plate, a rubber bearing, a cylindrical friction damper, a force transmission rod and a spring glass bead. The rubber bearing is fixedly connected to the upper and lower connecting plates by bolts. The connecting plate is provided with an arc groove and a hole. The cylindrical friction damper is embedded in the hole. The cylindrical friction dampers in the upper and lower connecting plates are arranged in a cross shape. The two ends of the inner tube of the cylindrical friction damper are respectively vertically connected to the force transmission rod. The top of the force transmission rod is connected to the spring glass bead adapted to the arc groove on the corresponding connecting plate. When the rubber bearing undergoes shear displacement along the main axis direction of the earthquake action, the arc groove on the connecting plate clamps the corresponding spring glass bead after movement and drives the cylindrical friction damper to move together through the force transmission rod. The cylindrical friction damper plays a damping role. When the rubber bearing recovers to the initial position from deformation, the spring glass bead will automatically disengage from the corresponding arc groove.

[0007] Compared with the prior art, the present invention adopting the above technical solution has the following outstanding features:

[0008] ① While maintaining the original energy dissipation capacity of the main body of the bearing, the energy dissipation capacity of the cylindrical friction damper is increased, so that the energy dissipation capacity of the seismic isolation bearing is improved.

[0009] ② The cylindrical friction damper is embedded in the connecting plate, so that the energy-absorbing element and the support body are combined into a whole, which has the characteristics of integration and miniaturization.

[0010] ③When the rubber bearing undergoes shear displacement along the main axis of the earthquake, the arc groove on the connecting plate moves and clamps the corresponding spring glass bead and drives the cylindrical friction damper to move through the force transmission rod. The cylindrical friction damper plays a damping role. When the rubber bearing recovers to its initial position after deformation, the spring glass bead will automatically disengage from the corresponding arc groove. The overall structure is simple, the size is small, and the energy consumption capacity is strong, which makes the application range of seismic isolation technology more extensive.

[0011] Preferably, a further technical solution of the present invention is:

[0012] The spring glass bead is composed of a small ball, a spring and a shell. The shell is fixed at the upper end of the force transmission rod. The small ball and the spring are placed in the shell. The spring is arranged between the small ball and the force transmission rod. When the rubber bearing undergoes shear displacement along the main axis of the earthquake action and the arc groove moves to contact the spring glass bead, the small ball is stuck in the arc groove, and the spring glass bead arc groove and the force transmission rod form a whole, thereby driving the cylindrical friction damper to move together. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall elevation structure of the seismic isolation support according to an embodiment of the present invention;

[0014] Figure 2 1 is a schematic diagram of the overall vertical section structure of the seismic isolation support according to an embodiment of the present invention;

[0015] Figure 3 This is a schematic diagram of the overall planar structure of a seismic isolation support according to an embodiment of the present invention;

[0016] Figure 4 is a schematic diagram of the structure of a connecting plate according to an embodiment of the present invention;

[0017] Figure 5 It is a schematic diagram of the connection structure between the cylindrical friction damper and the force transmission rod according to an embodiment of the present invention;

[0018] Figure 6 2 is a schematic diagram of the structure of a spring glass bead according to an embodiment of the present invention;

[0019] Figure 7 is a schematic diagram of an axonometric three-dimensional structure of an embodiment of the present invention;

[0020] In the figure: connecting plate 1; rubber bearing 2; cylindrical friction damper 3; force transmission rod 4; spring glass bead 5; arc groove 6; hole 7; inner tube 8; outer tube 9. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with embodiments, the purpose of which is only to better understand the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0022] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 A seismic isolation bearing with multiple energy dissipation characteristics includes a connecting plate 1, a rubber bearing 2, a cylindrical friction damper 3, a force transmission rod 4, and a spring glass bead 5. The rubber bearing 2 is fixedly connected to the upper and lower connecting plates 1 by bolts. The connecting plate 1 is provided with an arc groove 6 and a hole 7. The cylindrical friction damper 3 is embedded in the hole 7. The cylindrical friction dampers 3 in the upper and lower connecting plates 1 are arranged in a cross shape. The inner tube 8 of the cylindrical friction damper 3 is vertically connected to the force transmission rod 4 at both ends. The top of the force transmission rod 4 is connected to the corresponding arc groove on the connecting plate 1. 6 corresponding spring glass beads 5; when the rubber bearing 2 undergoes shear displacement along the main axis of the earthquake, the arc groove 6 on the connecting plate 1 moves to clamp the corresponding spring glass beads 5 and drive the cylindrical friction damper 3 to move together through the force transmission rod 4, and the cylindrical friction damper 3 plays a damping role. When the rubber bearing 2 recovers to the initial position from deformation, the spring glass beads 5 will automatically disengage from the corresponding arc groove 6, maintaining the original energy dissipation capacity of the rubber bearing 2, and increasing the energy dissipation capacity of the cylindrical friction damper 3, thereby improving the energy dissipation capacity of the seismic isolation bearing.

[0023] The spring glass bead 5 is composed of a small ball, a spring and a shell. The shell is fixed to the upper end of the force transmission rod 4. The small ball and the spring are placed in the shell, and the spring is arranged between the small ball and the force transmission rod 4. When the rubber bearing 2 undergoes shear displacement along the main axis direction of the earthquake action, the arc groove 6 moves to contact the spring glass bead 5, and the small ball is stuck in the arc groove 6. The spring glass bead 5, the arc groove 6, and the force transmission rod 4 form a whole, thereby driving the cylindrical friction damper 3 to move together.

[0024] The rubber bearing 2 is composed of several layers of rubber and steel plates alternately overlapped up and down, with sealing plates at both ends. The sealing plates are components used to seal the bearing rubber layer at both ends of the bearing body and fix it to the connecting plate 1. The diameter D of the rubber bearing 2 is 500mm, the diameter of the center hole is 80mm, the cross-sectional area is 191226mm2, the total height is 138mm, the total thickness of all rubber layers is 94mm, the total thickness of all steel plate layers plus sealing plate layers is 44mm, the thickness of the upper and lower sealing plates is 20mm, the upper and lower connecting plates 1 are made of steel, the cross-section is a square with a side length of 600mm, and the thickness is 30mm.

[0025] The state before the rubber bearing 2 is deformed by force is called the initial state. The lower connecting plate 1 of the rubber bearing 2 is fixed. The action mode and working principle of the whole mechanism are as follows:

[0026] (1) When the rubber bearing 2 is in the initial state, the force transmission rod 4 is not in contact with the connecting plate 1, and the spring glass ball 5 is located on the force transmission rod 4;

[0027] (2) The rubber bearing 2 undergoes shear deformation to the right, and the right end of its upper connecting plate 1 approaches the spring glass bead 5 on the right force transmission rod 5. The compressible spring below the spring glass bead 5 is compressed, and the spring glass bead 5 is embedded in the arc groove 6.

[0028] (3) The rubber bearing 2 continues to shear rightward, driving the right force transmission rod 4 to move rightward. The cylindrical friction damper 3 connected to the right force transmission rod 4 plays a damping role until the maximum shear deformation is reached, and then the rubber bearing 2 begins to return to its initial state.

[0029] (4) Before returning to the initial state, the end of the inner tube 8 of the cylindrical friction damper 3 first presses against the end of the outer tube 9, and the cylindrical friction damper 3 and the force transmission rod 4 and spring glass ball 5 connected thereto no longer move to the left. Thereafter, the rubber bearing 2 continues to return to the initial position to the left, and the spring glass ball 5 can automatically detach from the arc groove 6.

[0030] The present invention maintains the original energy dissipation capacity of the support body and increases the energy dissipation capacity of the cylindrical friction damper 3, thereby improving the energy dissipation capacity of the seismic isolation support. The cylindrical friction damper 3 is embedded in the connecting plate 1, so that the energy dissipation element and the support body are combined into a whole, which has the characteristics of integration and miniaturization, simple overall structure, small size, and strong energy dissipation capacity, making the application scope of seismic isolation technology more extensive.

[0031] The above description is only a preferred feasible embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent changes made using the contents of the present specification and its drawings are included in the scope of rights of the present invention.

Claims

1. A seismic isolation bearing with multiple energy dissipation characteristics, characterized in that: The invention comprises a connecting plate (1), a rubber support (2), a cylindrical friction damper (3), a force transmission rod (4), and a spring glass bead (5). The rubber support (2) is fixedly connected to the upper and lower connecting plates (1) by bolts. The connecting plate (1) is provided with an arc groove (6) and a hole (7). The cylindrical friction damper (3) is embedded in the hole (7). The cylindrical friction dampers (3) in the upper and lower connecting plates (1) are arranged in a cross shape. The inner tube (8) of the cylindrical friction damper (3) is respectively connected to the force transmission rod (4) at both ends. The top of the rod (4) is connected to a spring glass bead (5) adapted to the arc groove (6) on the corresponding connecting plate (1); when the rubber bearing (2) undergoes shear displacement along the main axis direction of the earthquake action, the arc groove (6) on the connecting plate (1) moves to clamp the corresponding spring glass bead (5) and drives the cylindrical friction damper (3) to move together through the force transmission rod (4), and the cylindrical friction damper (3) exerts a damping effect. When the rubber bearing (2) recovers to the initial position after deformation, the spring glass bead (5) automatically disengages from the corresponding arc groove (6).

2. The seismic isolation bearing with multiple energy dissipation characteristics according to claim 1 is characterized in that: The spring glass bead (5) is composed of a small ball, a spring and a shell. The shell is fixed to the upper end of the force transmission rod (4). The small ball and the spring are placed in the shell. The spring is arranged between the small ball and the force transmission rod (4).

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