Bridge seismic mitigation and isolation support

Abstract

The bridge seismic mitigation and isolation support comprises an upper supporting plate and a lower supporting plate which are arranged in a spaced mode, a plurality of vertical compression springs are connected to the lower surface of the upper supporting plate, the other ends of the vertical compression springs are connected with the upper surface of the lower supporting plate, and a horizontal guide shaft is arranged above the lower supporting plate in a suspended mode; sliding seats are connected to the guide shafts in a sliding mode, connecting rods are hinged to one ends of the sliding seats, the other ends of the connecting rods are hinged to the lower end of the upper supporting plate, and an acting force counteracting mechanism is arranged at the position, between the two sliding seats, of the guide shaft. According to the bridge support, the vertical stress part of a bridge can be transferred to the horizontal direction, the fatigue degree of the bridge in the vertical direction is reduced through interaction of the acting force counteracting mechanisms, and the bearing strength of the bridge support is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge supporting equipment, and in particular relates to a bridge seismic isolation bearing. Background Art

[0002] In the existing Chinese patent database, a patent named bridge bearing is disclosed, with application number CN202310693947.4 and application date 2023-06-12. A bridge bearing includes a top plate, a fixed seat, a shock absorbing mechanism, a limiting mechanism, a positioning mechanism and a lifting and adjusting mechanism. The shock absorbing mechanism includes a shock absorbing base, a plurality of first shock absorbing springs and a plurality of second shock absorbing springs. The shock absorbing base has a shock absorbing groove with a top opening, the top plate is arranged at the opening, and part of the top plate protrudes from the opening. The plurality of first shock absorbing springs are arrayed at the bottom of the shock absorbing groove and connected between the bottom of the shock absorbing groove and the bottom surface of the top plate. The plurality of second shock absorbing springs are arranged in a circumferential array along the inner wall of the shock absorbing groove and connected between the inner wall of the shock absorbing groove and the outer peripheral side of the top plate; the limiting mechanism includes a plurality of limiting columns, and the plurality of limiting columns are arrayed in the gap between the plurality of first shock absorbing spring arrays; the lifting and adjusting mechanism is connected between the shock absorbing base and the fixed seat, and the lifting and adjusting mechanism is used to adjust the spacing between the top plate and the fixed seat.

[0003] In the prior art, the fatigue strength of bridge support bearings will decrease after long-term use, resulting in a decrease in the support and shock-absorbing effect, which poses certain safety hazards. This article aims to propose a bridge seismic isolation bearing that transfers the vertical force-bearing part to the horizontal direction, and at the same time utilizes the control of the current to form a repulsive magnetic force, which plays a role in offsetting the force, thereby forming an anti-seismic buffering effect. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the fatigue strength of the bridge support bearing in the prior art will be reduced after long-term use, resulting in a decrease in the support and shock absorption effect, and there are certain safety hazards. In order to improve its shortcomings, the present invention provides a bridge seismic isolation bearing.

[0005] To achieve the above object, the present invention is implemented by the following technical solutions:

[0006] A bridge seismic isolation bearing comprises an upper support plate and a lower support plate arranged at intervals, a plurality of vertical compression springs are connected to the lower surface of the upper support plate, the other ends of the vertical compression springs are connected to the upper surface of the lower support plate, a horizontal guide shaft is suspended above the lower support plate, a sliding seat is slidably connected to the guide shaft, one end of the sliding seat is hinged with a connecting rod, the other end of the connecting rod is hinged to the lower end of the upper support plate, and a force offsetting mechanism is arranged on the guide shaft between the two sliding seats.

[0007] As a preferred solution, the force offsetting mechanism includes a transverse compression spring sleeved between the two sliding seats, one end of the transverse compression spring abuts against the inner end surface of one sliding seat, and the other end abuts against the inner end surface of the other sliding seat.

[0008] As a preferred embodiment, the force offsetting mechanism includes a first electromagnet fixed on a guide shaft, a wire is wound around the first electromagnet, an external current is connected to the wire, a second electromagnet is arranged on the end face of the sliding seat facing the first electromagnet, and the second electromagnet and the first electromagnet are arranged to repel each other.

[0009] As a preferred solution, an L-shaped seat is fixed to the upper edge of the lower support plate by bolts, the horizontal section of the L-shaped seat is fixedly connected to the lower support plate, and the end of the guide shaft is fixed to the side of the vertical section of the L-shaped seat.

[0010] As a preferred embodiment, the lower surface of the upper support plate is provided with a step surface, the lower surface of the step surface is provided with vertical plates at intervals, a hinge shaft is inserted between the two vertical plates, a limit block is fixed on the hinge shaft, and the upper end of the vertical compression spring abuts against the lower surface of the limit block.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. Due to the vertical compression spring and the horizontal force offset mechanism, the vertical force of the bridge can be transferred to the horizontal direction. Through the interaction of the force offset mechanism, the fatigue degree of the bridge in the vertical direction is reduced and the supporting strength of the bridge bearing is improved;

[0013] 2. By controlling the current of the energized electromagnet, the magnitude of the mutual repulsion force between the first electromagnet and the second electromagnet is adjusted, thereby increasing the strength of the bearing force in the horizontal direction and reducing the fatigue strength of the bridge support in the vertical direction;

[0014] 3. On bridges with heavy traffic, a larger current is set to form a larger repulsive force. On bridges with light traffic, a smaller current is set to form a smaller repulsive force. This also has the environmental protection effect of saving energy, is suitable for industrial production, and is very practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of Example 1 of the present invention.

[0016] Figure 2 This is a schematic diagram of the structure of Example 2 of the present invention.

[0017] In the figure: 1 upper support plate, 2 lower support plate, 3 vertical compression spring, 4 guide shaft, 5 sliding seat, 6 connecting rod, 7 transverse compression spring, 8 first electromagnet, 9 wire, 10 second electromagnet, 11

[0018] L-shaped seat, 12 step surface, 13 vertical plate, 14 limit block. DETAILED DESCRIPTION

[0019] The technical solution of the present application is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Embodiment 1, as Figure 1 As shown, a bridge seismic isolation bearing includes an upper support plate 1 and a lower support plate 2 arranged at intervals. A plurality of vertical compression springs 3 are connected to the lower surface of the upper support plate 1, and the other end of the vertical compression spring 3 is connected to the upper surface of the lower support plate 2. A horizontal guide shaft 4 is suspended above the lower support plate 2, and a sliding seat 5 is slidably connected to the guide shaft 4. A connecting rod 6 is hinged at one end of the sliding seat 5, and the other end of the connecting rod 6 is hinged to the lower end of the upper support plate 1. A force compensation mechanism is arranged on the guide shaft 4 between the two sliding seats 5. An L-shaped seat 11 is fixed to the edge of the upper surface of the lower support plate 2 by bolts, and the horizontal section of the L-shaped seat 11 is fixed to the lower support plate 2, and the end of the guide shaft 4 is fixed to the side of the vertical section of the L-shaped seat 11. A step surface 12 is provided on the lower surface of the upper support plate 1 , and vertical plates 13 are provided at intervals on the lower surface of the step surface 12 . A hinge shaft is inserted between the two vertical plates 13 , and a limit block 14 is fixed on the hinge shaft. The upper end of the vertical compression spring 3 abuts against the lower surface of the limit block 14 .

[0021] Specifically, the force offsetting mechanism includes a transverse compression spring 7 sleeved between the two sliding seats 5 , one end of the transverse compression spring 7 abuts against the inner end surface of one sliding seat 5 , and the other end abuts against the inner end surface of the other sliding seat 5 .

[0022] When the bridge is under stress, the vertical downward pressure causes the vertical compression spring 3 to contract. At the same time, the connection rod 6 and the sliding seat 5 are used to decompose the downward pressure into the horizontal direction. The sliding seat 5 moves inward along the direction of the guide shaft 4 to squeeze the transverse compression spring 7. The horizontal pressure is offset by compression, thereby playing an anti-seismic buffering role. At the same time, the stress degree of the vertical compression spring 3 is shared, and the service life of the vertical compression spring 3 is delayed.

[0023] Embodiment 2, as Figure 2As shown, a bridge seismic isolation bearing includes an upper support plate 1 and a lower support plate 2 arranged at intervals. A plurality of vertical compression springs 3 are connected to the lower surface of the upper support plate 1, and the other end of the vertical compression spring 3 is connected to the upper surface of the lower support plate 2. A horizontal guide shaft 4 is suspended above the lower support plate 2, and a sliding seat 5 is slidably connected to the guide shaft 4. A connecting rod 6 is hinged at one end of the sliding seat 5, and the other end of the connecting rod 6 is hinged to the lower end of the upper support plate 1. A force compensation mechanism is arranged on the guide shaft 4 between the two sliding seats 5. An L-shaped seat 11 is fixed to the edge of the upper surface of the lower support plate 2 by bolts, and the horizontal section of the L-shaped seat 11 is fixed to the lower support plate 2, and the end of the guide shaft 4 is fixed to the side of the vertical section of the L-shaped seat 11. A step surface 12 is provided on the lower surface of the upper support plate 1 , and vertical plates 13 are provided at intervals on the lower surface of the step surface 12 . A hinge shaft is inserted between the two vertical plates 13 , and a limit block 14 is fixed on the hinge shaft. The upper end of the vertical compression spring 3 abuts against the lower surface of the limit block 14 .

[0024] Specifically, the force offsetting mechanism includes a first electromagnet 8 fixed on the guide shaft 4, a wire 9 is wound around the first electromagnet 8, the wire 9 is connected to an external current, and a second electromagnet 10 is arranged on the end face of the sliding seat 5 facing the first electromagnet 8, and the second electromagnet 10 and the first electromagnet 8 are mutually exclusive.

[0025] When the bridge is under stress, the vertical downward pressure causes the vertical compression spring 3 to contract. At the same time, the downward pressure is partially decomposed into the horizontal direction by the setting of the connecting rod 6 and the sliding seat 5. The sliding seat 5 moves inward along the direction of the guide shaft 4. At this time, the first electromagnet 8 wrapped with the wire 9 is energized to form a magnetic force, which forms a mutual repulsion effect with the second electromagnet 10, thereby offsetting the horizontal pressure. On a bridge with a large traffic volume, a larger current is set to form a larger repulsive force. On a bridge with a small traffic volume, a smaller current is set to form a smaller repulsive force, which has an energy-saving and environmentally friendly effect.

[0026] The present invention is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed in the present invention, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present invention.

Claims

1. A bridge seismic isolation bearing, characterized in that: The invention comprises an upper support plate (1) and a lower support plate (2) which are arranged at intervals. A plurality of vertical compression springs (3) are connected to the lower surface of the upper support plate (1). The other end of the vertical compression springs (3) is connected to the upper surface of the lower support plate (2). A horizontal guide shaft (4) is suspended above the lower support plate (2). A sliding seat (5) is slidably connected to the guide shaft (4). One end of the sliding seat (5) is hinged with a connecting rod (6). The other end of the connecting rod (6) is hinged with the lower end of the upper support plate (1). A force offset mechanism is arranged on the guide shaft (4) between the two sliding seats (5).

2. The bridge seismic isolation bearing according to claim 1, characterized in that: The force offsetting mechanism comprises a transverse compression spring (7) sleeved between two sliding seats (5), one end of the transverse compression spring (7) abuts against the inner end surface of one sliding seat (5), and the other end abuts against the inner end surface of the other sliding seat (5).

3. The bridge seismic isolation bearing according to claim 1, characterized in that: The force canceling mechanism comprises a first electromagnet (8) fixed on a guide shaft (4), a wire (9) being wound around the outside of the first electromagnet (8), an external current being connected to the wire (9), and a second electromagnet (10) being arranged on the end face of a sliding seat (5) facing the first electromagnet (8), the second electromagnet (10) and the first electromagnet (8) being arranged to repel each other.

4. A bridge seismic isolation bearing according to any one of claims 1 to 3, characterized in that: An L-shaped seat (11) is fixed to the upper surface edge of the lower support plate (2) via bolts, the horizontal section of the L-shaped seat (11) is fixedly connected to the lower support plate (2), and the end of the guide shaft (4) is fixed to the side of the vertical section of the L-shaped seat (11).

5. The bridge seismic isolation bearing according to claim 4, characterized in that: The lower surface of the upper support plate (1) is provided with a step surface (12), the lower surface of the step surface (12) is provided with vertical plates (13) at intervals, a hinge shaft is inserted between the two vertical plates (13), a limit block (14) is fixedly connected to the hinge shaft, and the upper end of the vertical compression spring (3) abuts against the lower surface of the limit block (14).

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