Bridge anti-seismic reinforcing anti-beam bracket

Abstract

This utility model relates to the field of bridge engineering technology and discloses a bridge seismic reinforcement anti-fall beam bracket. The bracket consists of a steel bracket, anchor bolts, and buffer elastic pads. Through a simple structural design, it effectively extends the overlap length from the bridge beam end to the pier, abutment cap, or cap beam edge, thereby preventing beam collapse under extreme seismic loads. The steel bracket is welded from a connecting plate and a support plate arranged at right angles, and its overall rigidity is enhanced by stiffening plates. The connecting plate is fixed to the pier cap beam by anchor bolts, making installation convenient and stable. Buffer elastic pads are installed on the upper surface of the support plate, which can absorb and buffer the impact energy of the beam on the bracket under seismic action, further improving seismic performance. This utility model is applicable to existing bridges of different bridge types, spans, and bearing types, with strong compatibility, minimal modification work, and significantly improves the seismic resistance of existing bridges, providing a reliable guarantee for the safe operation of bridges throughout their entire life cycle.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering technology, and in particular to a bridge seismic reinforcement and anti-fall beam bracket. Background Technology

[0002] As a crucial node in highway transportation networks, the seismic performance of bridges directly impacts the safety of people's lives and property and the reliability of the transportation system. Under extreme seismic loads, bridge structures may experience beam collapse due to excessive relative displacement between the beams and piers, resulting in severe economic losses and social impacts. Therefore, anti-collapse design is a vital aspect of bridge seismic design.

[0003] Current regulations require that the minimum lap length from the end of a bridge beam to the pier, abutment cap, or edge of the cap beam meet certain standards to minimize the risk of beam collapse during earthquakes. However, many existing bridges, due to lower historical design standards or aging from long-term use, no longer meet the minimum lap length requirements for their cap beams in the longitudinal direction. This makes these bridges more vulnerable to beam collapse during earthquakes.

[0004] Currently, common methods for reinforcing existing bridges to prevent beam collapse include installing flexible damping devices and combined connection systems. However, these methods have the following shortcomings:

[0005] 1. Flexible damping devices: Although they can mitigate impacts, they are expensive to manufacture, complex to maintain, prone to aging after long-term use, and may still fail under conditions of displacement exceeding the design limit.

[0006] 2. Modular connection system: Although it takes into account a certain degree of rigidity and deformation capacity, it has a complex structure, high installation accuracy requirements, poor adaptability to existing bridges, and is difficult to promote in a modular manner.

[0007] In addition, existing reinforcement methods are generally not compatible with different bridge types, spans or bearing types, and the amount of renovation work is large, the construction period is long, and the economy is insufficient.

[0008] In conclusion, there is an urgent need for a compact, economical, durable, easy-to-install, and highly adaptable anti-falling beam reinforcement measure to address the risk of existing bridges falling under seismic loads. Utility Model Content

[0009] To address the aforementioned technical problems, this utility model provides a bridge seismic reinforcement anti-fall beam bracket, which aims to extend the bridge's overlap length through a simple structural design, thereby effectively preventing beam fall disasters under earthquake action and providing reliable protection for the safety of the bridge throughout its entire life cycle.

[0010] The technical solution adopted in this utility model is as follows:

[0011] A bridge seismic reinforcement anti-fall beam bracket, wherein several sets of the bridge seismic reinforcement anti-fall beam bracket are symmetrically installed on the front and rear sides of each pier cap beam, and are located at the connection between the pier cap beam and the bridge beam body;

[0012] The bridge seismic reinforcement anti-fall beam support includes a steel bracket that is fixedly connected to the pier cap beam. The upper surface of the steel bracket is equipped with a buffer elastic pad, which can contact the bottom of the beam to buffer the impact on the bridge beam.

[0013] Furthermore, the steel bracket includes a connecting plate and a support plate arranged at right angles, with one side of the support plate welded and fixed to the top of the connecting plate; a number of stiffening plates are also provided between the connecting plate and the support plate, and the stiffening plates are welded and fixed to the connecting plate and the support plate respectively.

[0014] Furthermore, the connecting plate is attached to the pier cap beam on the side away from the support plate, and has a number of through holes arranged in a matrix on it; a number of anchor bolts extend into the pier cap beam to fix the connecting plate to the pier cap beam.

[0015] Furthermore, the number of stiffening plates is at least three, and the top and one side of the stiffening plates are welded and fixed to the support plate and the connecting plate, respectively.

[0016] Furthermore, the buffer elastic pad is fixedly installed on the support plate.

[0017] The beneficial effects of this utility model are:

[0018] 1. Simple structure, economical and durable: This utility model adopts a combination design of steel bracket and buffer elastic pad, which is compact and easy to process and manufacture. The steel bracket is made of high-strength steel or aluminum alloy, which is inexpensive and durable, and can play a stable seismic reinforcement role for a long time.

[0019] 2. Effectively extend the lap length to prevent beam collapse: By installing this bracket on both sides of the pier cap beam, the lap length from the bridge beam end to the pier, abutment cap or cap beam edge can be significantly extended, thereby limiting the excessive displacement of the beam under seismic action, reducing the risk of beam collapse, and providing reliable protection for bridge safety.

[0020] 3. Excellent buffering performance and strong impact resistance: The upper surface of the bracket is equipped with buffer elastic pads, which can effectively absorb and mitigate the impact energy of the beam on the bracket under seismic action, further reduce the relative movement between the beam and the pier, and avoid structural damage caused by rigid collision.

[0021] 4. Convenient construction and strong adaptability: This utility model uses anchor bolts to fix the steel bracket to the pier cap beam, making the installation process simple and efficient, without the need for complex construction equipment or high-precision operation. Furthermore, its modular design makes it suitable for existing bridges of different bridge types, spans, and bearing types, offering good compatibility, minimal renovation work, short construction period, and significant economic benefits.

[0022] 5. Improve the seismic performance of existing bridges: In view of the fact that many existing bridges cannot meet the requirements of current seismic codes due to insufficient historical design standards or aging problems, this utility model significantly improves the overall seismic performance of existing bridges and extends their service life by increasing the overlap length and enhancing seismic capacity.

[0023] In summary, the bridge seismic reinforcement anti-fall beam bracket not only solves the risk of beam falling off existing bridges under seismic action, but also has advantages such as economy, durability and wide applicability, providing a reliable seismic reinforcement measure for the safe operation of bridges throughout their entire life cycle. Attached Figure Description

[0024] Figure 1 , Figure 2 This is a schematic diagram showing the installation position of the bridge seismic reinforcement and anti-fall beam bracket of this utility model;

[0025] Figure 3 This is a schematic diagram of the overall structure of the bridge seismic reinforcement and anti-fall beam bracket of this utility model;

[0026] In the diagram, 1—bridge seismic reinforcement anti-fall beam bracket, 2—bridge pier cap beam, 3—beam body, 4—steel bracket, 5—buffer elastic pad, 6—connecting plate, 7—support plate, 8—stiffening plate, 9—anchor bolt. Detailed Implementation

[0027] 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.

[0028] This embodiment provides a bridge seismic reinforcement anti-fall beam bracket, which aims to extend the overlap length of the bridge through a simple structural design, thereby effectively preventing beam fall disasters under earthquake action and providing reliable protection for the safety of the bridge throughout its entire life cycle.

[0029] Specifically, such as Figure 1 and Figure 2 As shown, Figure 1 To indicate the direction along the bridge. Figure 2The bridge is viewed from the side. The seismic reinforcement anti-fall beam bracket 1 is installed on the front and rear sides of the pier cap beam 2, and is symmetrically arranged at the connection between each pier cap beam 2 and the bridge beam 3. The seismic reinforcement anti-fall beam bracket 1 includes a steel bracket 4 fixedly connected to the pier cap beam 2. The steel bracket 4 is fixed to the outer surface of the pier cap beam 2 by anchor bolts 9. The upper surface of the steel bracket 4 is equipped with a buffer elastic pad 5, which can contact the bottom of the beam 3 to buffer the impact on the bridge beam 3.

[0030] like Figure 2 and Figure 3 As shown, the steel bracket 4 in this embodiment is made of high-strength steel or aluminum alloy to ensure structural strength and durability. The steel bracket 4 includes a connecting plate 6 and a support plate 7 arranged at right angles. One side of the support plate 7 is welded and fixed to the top of the connecting plate 6. Several stiffening plates 8 are also provided between the connecting plate 6 and the support plate 7. The number of stiffening plates 8 is at least 3, and the top and one side of the stiffening plates 8 are welded and fixed to the support plate 7 and the connecting plate 6, respectively. As a core load-bearing component, the steel bracket 4 limits the excessive displacement of the beam 3 under seismic action by extending the overlap length from the bridge beam end to the edge of the cap beam.

[0031] like Figure 2 and Figure 3 As shown, in this embodiment, the connecting plate 6, on the side away from the support plate 7, is attached to the pier cap beam 2. It has several through holes arranged in a matrix, which are used to fit the anchor bolts 9. The anchor bolts 9 are high-strength bolts with good tensile strength and corrosion resistance. Several anchor bolts 9 extend into the pier cap beam 2 to fix the connecting plate 6 to the pier cap beam 2, thereby firmly fixing the steel bracket 4 to the pier cap beam 2, ensuring that the bracket can stably bear the impact load of the beam 3 under seismic action.

[0032] like Figure 2 and Figure 3 As shown, in this embodiment, the buffer elastic pad 5 is fixedly installed on the support plate 7. The buffer elastic pad 5 is made of rubber or polyurethane material with good elasticity and wear resistance. It is used to absorb and mitigate the impact energy of the beam 3 on the steel bracket 4 under seismic action, and reduce the damage to the bridge structure caused by rigid collision.

[0033] The construction steps for the seismic reinforcement and anti-fall beam support of this bridge are as follows:

[0034] First, steel brackets 4, buffer elastic pads 5, and anchor bolts 9 are fabricated according to the bridge structure dimensions. Then, the connecting plate 6 of the steel bracket 4 is attached to the outer surface of the pier cap beam 2, and after adjustment, it is fixed with the anchor bolts 9. Next, the buffer elastic pads 5 are installed on the support plate 7 of the steel bracket 4, ensuring accurate positioning and contact with the beam body 3. Finally, the installation quality is checked to ensure that all components are firmly connected and that the buffer elastic pads 5 are not loose or misaligned.

[0035] The seismic-strengthened anti-fall beam bracket of the bridge is fixed to the pier cap beam 2 via connecting plate 6, and its support plate 7 extends outward, effectively increasing the overlap length from the bridge beam end to the edge of the cap beam. This design limits the relative displacement of the beam 3 under seismic loads and reduces the risk of beam 3 slipping. Under seismic loads, the beam 3 will generate a large horizontal impact force; the buffer elastic pad 5 is located on the upper surface of the support plate 7 of the steel bracket 4 and is in direct contact with the bottom of the beam 3. When the beam 3 shifts, the buffer elastic pad 5 absorbs the impact energy through its own elastic deformation, thereby reducing the impact damage to the steel bracket 4 and the pier cap beam 2. The steel bracket 4 is firmly fixed to the pier cap beam 2 by anchor bolts 9, and the stiffening plate 8 enhances the overall rigidity of the connecting plate 6 and the support plate 7, ensuring that the bracket remains stable under extreme seismic loads and avoiding failure due to local instability.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A bridge seismic reinforcement and anti-fall beam bracket, characterized in that: Several sets of seismic reinforcement anti-fall beam brackets for the bridge are symmetrically installed on the front and rear sides of each pier cap beam, and are located at the connection between the pier cap beam and the bridge beam. The bridge seismic reinforcement anti-fall beam support includes a steel bracket that is fixedly connected to the pier cap beam. The upper surface of the steel bracket is equipped with a buffer elastic pad, which can contact the bottom of the beam to buffer the impact on the bridge beam.

2. The bridge seismic reinforcement and anti-fall beam bracket according to claim 1, characterized in that: The steel bracket includes a connecting plate and a support plate arranged at right angles. One side of the support plate is welded and fixed to the top of the connecting plate. Several stiffening plates are also provided between the connecting plate and the support plate, and the stiffening plates are welded and fixed to the connecting plate and the support plate respectively.

3. The bridge seismic reinforcement and anti-fall beam bracket according to claim 2, characterized in that: The connecting plate is attached to the pier cap beam on the side away from the support plate, and has several through holes arranged in a matrix on it; several anchor bolts extend into the pier cap beam to fix the connecting plate to the pier cap beam.

4. The bridge seismic reinforcement and anti-fall beam bracket according to claim 2, characterized in that: The number of stiffening plates is at least three, and the top and one side of the stiffening plates are welded and fixed to the support plate and the connecting plate, respectively.

5. The bridge seismic reinforcement and anti-fall beam bracket according to claim 2, characterized in that: The buffer elastic pad is fixedly installed on the support plate.

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