Bridge anti-seismic support

Abstract

The utility model discloses a bridge anti-seismic support and relates to the technical field of bridges, the bridge anti-seismic support comprises a lower base, a connecting piece, an isolation block, a supporting block and a limiting groove, the edge of the lower base is provided with a circular through hole used for inserting an anchor bolt for fixation, the top of the lower base is provided with the limiting groove, the isolation block is arranged in the limiting groove, and the supporting block is arranged in the limiting groove. The lower base and the top of the bridge pier are installed and fixed, then the supporting column is placed in the limiting groove, the upper base is fixedly connected with the bottom of the bridge, and vibration of the bridge is effectively buffered through the vibration isolation block between the supporting column and the lower base; the supporting columns are arranged in the limiting grooves, so that when the bridge slightly moves in the horizontal direction, the supporting columns can move in the limiting grooves, buffer space can be provided for dynamic deformation of the bridge by reserving the displacement distance, structural fatigue damage caused by frequent tiny displacement is avoided, and the service life of the device is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of bridge technology, specifically to a bridge seismic bracing system. Background Technology

[0002] To extend their service life, bridges are typically equipped with seismic bracing at their base during construction, serving as a buffer and protecting the bridge. A search revealed Chinese patent publication number CN221663459U, which discloses an adjustable bridge seismic bracing system. This device uses a lifting assembly on one side of the first support shaft to raise and lower the seismic support assembly, which then acts on the bridge's seismic support section. The seismic support assembly can be adjusted according to the parts of the bridge requiring support, effectively solving the problem of deformation and breakage in existing bridge seismic bracing systems. However, during use, the repeated action of vehicle loads causes minor vibrations and displacements in the bridge structure. This device lacks pre-reserved displacement space in the forward and backward directions, causing these dynamic effects to concentrate in certain parts of the bridge, leading to structural fatigue damage. The dynamic effects of vehicle loads may cause localized stress concentration in the bridge; without sufficient buffer space, this could trigger localized damage or even affect the overall structural safety of the bridge. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a bridge seismic bracing system, which solves the problem mentioned in the background art that existing devices do not have reserved displacement space in the front and rear directions, and these dynamic effects will be concentrated in certain parts of the bridge, leading to structural fatigue damage.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a bridge seismic bracing system, comprising a lower base, a connector, a seismic isolation block, a support block, and a limiting groove. The lower base has a circular through hole on its edge for inserting anchor bolts. A limiting groove is provided on the top of the lower base, and a seismic isolation block is disposed inside the limiting groove. A support block is disposed on top of the seismic isolation block, and a support column is disposed above the support block. The top of the support column is welded to an upper base. A circular slot is provided on the top edge of the upper base for inserting anchor bolts. A connector is provided on the outer side of the lower base, connecting the lower base to the upper base via the connector. A spring is disposed inside the limiting groove, located outside the support column, with a gap between the inner wall of the spring and the outer wall of the support column.

[0005] Preferably, the limiting groove has a circular shape, and there is a gap between the inner wall of the limiting groove and the outer wall of the support column. When the bridge is subjected to earthquakes or other external forces, the support column can move horizontally within the limiting groove. This mobility provides a certain buffer space for the bridge, avoiding structural fatigue damage caused by frequent small displacements. During use, the bridge may undergo small dynamic deformations due to factors such as vehicle loads and temperature changes. The existence of the gap provides a buffer space for these deformations, ensuring that the seismic bracing can adapt to these dynamic changes without structural damage due to rigid constraints.

[0006] Preferably, the vibration isolation block is made of rubber and is embedded in the limiting groove. The top of the vibration isolation block is bonded to the bottom of the support block. Rubber has high elasticity and can undergo elastic deformation when subjected to external force and return to its original shape after the force disappears. This characteristic enables it to effectively absorb and buffer vibrations caused by earthquakes or vehicle loads.

[0007] Preferably, the surface of the support block slides in contact with the surface of the ball bearings, the ball bearings are embedded in the bottom of the support column, and the ball bearings are distributed in an annular shape with equal spacing. The sliding contact transforms sliding friction into rolling friction through the rolling motion of the ball bearings, which significantly reduces the coefficient of friction, thereby reducing energy loss and component wear.

[0008] Preferably, the connector is a steel cable composed of multiple steel wires. The connector has threaded ends at both ends, and the two ends of the connector are connected to the upper base and the lower base respectively through threads. The steel cable is composed of multiple steel wires, which has both high strength and can withstand large tensile forces, as well as a certain degree of flexibility, so as to adapt to the deformation requirements of the bridge under earthquakes or other dynamic loads.

[0009] This utility model provides a bridge seismic bracing system. It has the following beneficial effects:

[0010] (1) The bridge seismic bracing device is installed by fixing the lower base to the top of the pier, and then placing the support column into the limiting groove. The upper base is fixedly connected to the bottom of the bridge. The vibration of the bridge is effectively buffered by the vibration isolation block between the support column and the lower base. Since there is a gap between the support column and the inner wall of the limiting groove, the support column can move inside the limiting groove when the bridge is subjected to small horizontal movement. The reserved displacement distance can provide buffer space for the dynamic deformation of the bridge, avoid structural fatigue damage caused by frequent small displacements, and thus extend the service life of the device.

[0011] (2) This type of bridge seismic bracing has steel balls installed at the bottom of the support column, which reduces the friction between the support column and the support plate during use. At the same time, since the upper base and the lower base are flexibly connected by connectors, a certain degree of relative displacement and deformation between the bridge bases is allowed, thereby absorbing and dissipating vibration energy and reducing the impact of vibration on the bridge structure. Traditional rigid connections are prone to failure due to stress concentration during earthquakes, while flexible connections disperse stress through the deformation of steel cables, reducing the risk of brittle failure of the structure.

[0012] This solves the problem that existing devices do not have reserved displacement space in the front and rear directions, and these dynamic effects will be concentrated in certain parts of the bridge, leading to structural fatigue damage. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the spring structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the vibration isolation block structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the lower base structure of this utility model;

[0017] Figure 5 This is a schematic diagram of the upper base structure of this utility model.

[0018] In the diagram, 1 is the lower base; 2 is the upper base; 3 is the support column; 4 is the ball bearing; 5 is the spring; 6 is the connector; 7 is the vibration isolation block; 8 is the support block; and 9 is the limiting groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1:

[0021] Please see Figure 1-5This utility model provides a technical solution: a bridge seismic bracing system, comprising a lower base 1, a connector 6, a seismic isolation block 7, a support block 8, and a limiting groove 9. The lower base 1 has a circular through hole on its edge for inserting anchor bolts. The lower base 1 has a limiting groove 9 on its top, with a seismic isolation block 7 inside. A support block 8 is positioned on top of the seismic isolation block 7, and a support column 3 is positioned above the support block 8. The top of the support column 3 is welded to an upper base 2. The upper base 2 has a circular slot on its top edge for inserting anchor bolts. The lower base 1 has a connector 6 on its outer side, connecting it to the upper base 2. A spring 5 is located inside the limiting groove 9, positioned on the support column 3. Externally, there is a gap between the inner wall of the spring 5 and the outer wall of the support column 3. During installation, the lower base 1 is fixed to the top of the pier, and then the support column 3 is placed into the limiting groove 9. The upper base 2 is fixedly connected to the bottom of the bridge. The vibration isolation block 7 between the support column 3 and the lower base 1 effectively buffers the vibration of the bridge. Because there is a gap between the support column 3 and the inner wall of the limiting groove 9, the support column 3 can move inside the limiting groove 9 when the bridge is subjected to small horizontal movements. By reserving a displacement distance, a buffer space can be provided for the dynamic deformation of the bridge, avoiding structural fatigue damage caused by frequent small displacements, thereby extending the service life of the device.

[0022] Example 2:

[0023] This utility model embodiment provides a technical solution: a bridge seismic bracing system, wherein the limiting groove 9 is circular in shape, and there is a gap between the inner wall of the limiting groove 9 and the outer wall of the support column 3; the vibration isolation block 7 is made of rubber and is embedded in the limiting groove 9, with the top of the vibration isolation block 7 bonded to the bottom of the support block 8; the surface of the support block 8 slides in contact with the surface of the ball bearing 4, the ball bearing 4 is embedded in the bottom of the support column 3, and the ball bearing 4 is distributed in a ring with equal spacing; the connecting member 6 is a steel cable composed of multiple steel wires, and threaded heads are provided at both ends of the connecting member 6, and the two ends of the connecting member 6 are respectively connected to the support column 3 by threads. The upper base 2 is connected to the lower base 1. By setting steel balls at the bottom of the support column 3, the friction between the support column 3 and the support plate can be reduced during use. At the same time, since the upper base 2 and the lower base 1 are flexibly connected by the connector 6, a certain degree of relative displacement and deformation between the bridge bases is allowed, thereby absorbing and dissipating vibration energy and reducing the impact of vibration on the bridge structure. Traditional rigid connections are prone to failure due to stress concentration during earthquakes, while flexible connections disperse stress through the deformation of steel cables, reducing the risk of brittle failure of the structure.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A bridge seismic bracing system, characterized in that: The system includes a lower base (1), a connector (6), a vibration isolation block (7), a support block (8), and a limiting groove (9). The lower base (1) has a circular through hole on its edge for inserting anchor bolts for fixing. The lower base (1) has a limiting groove (9) on its top. The vibration isolation block (7) is installed inside the limiting groove (9). The vibration isolation block (7) is installed on top of the vibration isolation block (7). The support block (8) is installed above the support block (8). The top of the support block (3) is welded to the upper base (2). The upper base (2) has a circular hole on its top edge for inserting anchor bolts for fixing. The lower base (1) has a connector (6) on its outer side. The lower base (1) is connected to the upper base (2) through the connector (6). The limiting groove (9) has a spring (5) inside. The spring (5) is located outside the support column (3). There is a gap between the inner wall of the spring (5) and the outer wall of the support column (3).

2. The bridge seismic bracing according to claim 1, characterized in that: The limiting groove (9) has a circular shape, and there is a gap between the inner wall of the limiting groove (9) and the outer wall of the support column (3).

3. The bridge seismic bracing according to claim 1, characterized in that: The vibration isolation block (7) is made of rubber and is embedded in the limiting groove (9). The top of the vibration isolation block (7) is glued to the bottom of the support block (8).

4. The bridge seismic bracing according to claim 1, characterized in that: The surface of the support block (8) slides in contact with the surface of the ball (4), the ball (4) is embedded in the bottom of the support column (3), and the ball (4) is distributed in a ring with equal spacing.

5. The bridge seismic bracing according to claim 1, characterized in that: The connector (6) is a steel cable composed of multiple steel wires. The connector (6) has threaded heads at both ends, and the two ends of the connector (6) are connected to the upper base (2) and the lower base (1) respectively by threads.

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