Multi-directional anti-crawling device for curved girder bridge

Abstract

The utility model discloses a kind of curve girder bridge multidirectional anti-climbing devices, the device is composed of hinged seat, connecting rod piece, circular metal sleeve, rubber pad, limiting metal coil spring, set two curve girder bridge multidirectional anti-climbing devices between bridge upper portion and lower portion structure, one end of each the anti-climbing device is connected to the upper portion structure, the other end is connected to the lower portion structure, the device guarantees the deformation required in bridge normal operation process, simultaneously prevent bridge exceeding deformation limit to prevent climbing disease.In the same cross section, the stress direction of two the anti-climbing devices intersects, resists the stress condition of one end tension, one end pressure in curve girder bridge climbing process, exert force in multiple directions, so that the upper portion structure and lower portion structure are constrained and limited between, make overall structure more stable, the curve girder bridge has the curve girder bridge anti-climbing device of multidirectional constraint function.

Description

Technical Field

[0001] This utility model belongs to the field of bridge structure technology, and specifically relates to a multi-directional anti-climbing device for curved beam bridges. Background Technology

[0002] With the development of the national economy and the continuous increase in investment in infrastructure construction, more and more high-grade highways and large interchanges have emerged to meet the needs of urban transportation and regional connections. Among them, curved beam bridges are an indispensable component and are widely used. Due to their good adaptability to the route and their aesthetic appeal, curved beam bridges have been widely used in mountainous highways, high-grade highways and urban interchange projects in my country.

[0003] However, during the design and construction of curved beam bridges, the understanding of the unique mechanical phenomena and deformation characteristics of curved beam bridges is not deep enough, and the theoretical analysis methods are still incomplete and inaccurate: relevant departments lack complete design specifications for curved beam bridges; the rapid increase in traffic volume and the frequent occurrence of overloading have led to increasingly prominent defects in curved beam bridges.

[0004] In recent years, various curved beam bridges across different regions have experienced a number of defects, with climb-over being the most prevalent. These defects range from minor impacts on aesthetics and reduced driving comfort to serious public safety incidents such as bridge collapses, causing significant negative social consequences. Therefore, a multi-directional anti-climb-over device for curved beam bridges is needed, capable of preventing deformation during normal operation and ensuring precise and controllable climb-over control. Utility Model Content

[0005] The purpose of this invention is to provide a multi-directional anti-creep device for curved beam bridges. Elastic constraints are set between the superstructure and substructure of the curved beam bridge to ensure that deformation of the bridge during normal operation is not suppressed. When the displacement limit is reached, multi-directional rigid body constraints are applied to effectively suppress creep in all directions of the curved beam bridge. Compared with existing anti-creep devices, this invention features multi-directional tensile and compressive elastic constraints and is suitable for creep defects in different types of curved beam bridges.

[0006] The technical solution adopted in this utility model patent is: a multi-directional anti-climbing device for curved beam bridges, including a hinged seat, a connecting rod, a circular metal sleeve, a rubber pad, and a limiting metal helical spring;

[0007] The hinged seat and the connecting rod are connected to the upper and lower structures of the curved bridge by a pin and fixed by a retaining ring.

[0008] The limiting metal helical spring and the connecting rod are connected by a threaded connection at the end of the spring to facilitate subsequent replacement and installation.

[0009] The circular metal sleeve and the rubber pad are bonded together by vulcanization under high temperature and pressure to form a single unit.

[0010] The circular metal sleeve has circular openings at both ends for the limiting metal helical spring to pass through. The overall diameter of the limiting metal helical spring should be smaller than the inner diameter of the circular metal sleeve to prevent it from getting stuck and unable to achieve the elastic effect when deformed.

[0011] The two devices need to be connected and fixed by threaded steel plates and bolts, and are arranged crosswise between the upper and lower structures of the bridge to resist forces from different directions.

[0012] Preferably, the hinged seat and connecting rod are hinged and arranged bidirectionally between the upper and lower structures to resist multidirectional forces.

[0013] As a preferred option, the springs have space for bidirectional elastic deformation during normal deformation of the curved beam bridge to provide protection. When the bridge deformation exceeds the limit, one end of the member generates tension and the other end generates pressure, which limits the displacement of the bridge and prevents creep.

[0014] As a preferred option, the rubber pad vulcanized and bonded inside the circular metal sleeve enhances the vibration damping effect and reduces noise compared to rubber with high compressive strength.

[0015] Preferably, any one of the rods can decompose, cancel out, and constrain the relative forces generated between the upper and lower structures.

[0016] Preferably, the device has an adjustable length and a simple structure and installation, and can be applied to curved beam bridges with different types of superstructures and substructures.

[0017] The beneficial effects of this invention are as follows: Existing anti-creep devices are mostly rigid designs, lacking the elastic deformation space and energy-dissipating buffering effect required for normal bridge operation. They also often lack multi-directional constraint functions, only considering the unilateral creep situation of curved bridges, which does not match actual engineering conditions. This invention addresses these problems by implementing elastic energy-dissipating constraints on multi-directional creep of curved beam bridges, effectively preventing creep of curved bridges.

[0018] When a curved girder bridge experiences minor deformations under normal operating conditions such as vehicle braking force, temperature differences, and concrete shrinkage and creep, the limiting metal helical springs inside the device will elastically deform synchronously to meet the deformation requirements of the bridge and avoid damage to bridge components caused by rigid constraints. When a curved girder bridge experiences significant deformation and creep due to long-term effects of unconventional conditions such as construction deviations and excessive loads, the limiting metal helical springs are restricted from deformation by the circular metal sleeves, and the device is transformed into a rigid rod, thereby effectively preventing creep defects in the curved girder bridge. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this example.

[0020] Figure 2 This is a schematic diagram of the anti-climbing device structure in this example. Detailed Implementation

[0021] The present invention will now be described in a clearer and more complete manner with reference to the accompanying drawings and specific embodiments.

[0022] like Figures 1 to 2 As shown, a multi-directional anti-climbing device for a curved beam bridge includes a hinged seat 1, a connecting rod 2, a circular metal sleeve 3, a rubber pad 4, and a limiting metal helical spring 5.

[0023] The hinge seat 1 and the connecting rod 2 are connected to the upper and lower structures of the curved bridge by a pin and fixed by a retaining ring;

[0024] The limiting metal helical spring 5 and the connecting rod 2 are connected by a threaded connection at the end of the spring to facilitate subsequent replacement and installation.

[0025] The circular metal sleeve 3 and the rubber pad 4 are vulcanized and bonded together under high temperature and pressure to form a single unit;

[0026] The circular metal sleeve 3 has circular openings at both ends for the limiting metal helical spring 5 to pass through. The overall diameter of the limiting metal helical spring 5 should be smaller than the inner diameter of the circular metal sleeve 3 to prevent it from getting stuck and blocked when deformed, thus failing to achieve the elastic effect.

[0027] The two devices need to be connected and fixed by threaded steel plates and bolts, and are arranged crosswise between the upper and lower structures of the bridge to resist forces from different directions.

[0028] The working principle of this utility model is as follows: During normal operation of the curved beam bridge, the deformation of the superstructure is transmitted to the limiting metal helical spring 5 through the hinge seat 1 and connecting rod 2, and then the force is transmitted to the substructure of the bridge through the lower support connecting rod 2 and hinge seat 1. When the deformation of the superstructure exceeds the limit value of the limiting metal helical spring 5, the circular metal sleeve 3 constrains the deformation of the spring and forms a rigid body with the upper and lower support connecting rods 2 to limit the superstructure of the bridge, preventing the curved beam bridge from creeping. The rubber pad 4 contacts the limiting block of the limiting metal helical spring 5, effectively reducing the collision noise and vibration between the limiting metal helical spring 5 and the circular metal sleeve 3.

[0029] The embodiments of this utility model patent have been described in detail above with reference to the accompanying drawings, but this utility model patent is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations of these embodiments within the scope of the principles and technical concept of this utility model patent still fall within the protection scope of this utility model patent.

Claims

1. A multi-directional anti-creep device for curved beam bridges, characterized in that: Includes hinge base, connecting rod, circular metal sleeve, rubber pad, and limiting metal helical spring; The hinged seat and the connecting rod are connected to the upper and lower structures of the curved bridge by a pin and fixed by a retaining ring. The limiting metal helical spring and the connecting rod are connected by a threaded connection at the end of the spring to facilitate subsequent replacement and installation. The circular metal sleeve and the rubber pad are bonded together by vulcanization under high temperature and pressure to form a single unit. The circular metal sleeve has circular openings at both ends for the limiting metal helical spring to pass through. The overall diameter of the limiting metal helical spring should be smaller than the inner diameter of the circular metal sleeve to prevent it from getting stuck and unable to achieve the elastic effect when deformed.

2. The multi-directional anti-creep device for curved beam bridges according to claim 1, characterized in that: The hinged seat and connecting rod are hinged and arranged in a bidirectional cross pattern between the upper and lower structures to resist multidirectional forces.

3. The multi-directional anti-creep device for curved beam bridges according to claim 1, characterized in that: When a curved beam bridge deforms normally, the spring has space for bidirectional elastic deformation to provide protection. When the bridge deformation exceeds the limit, one end of the member generates tension and the other end generates pressure, which restricts the displacement of the curved bridge and prevents multi-directional creep.

4. The multi-directional anti-creep device for curved beam bridges according to claim 1, characterized in that: The rubber pad bonded by vulcanization inside the circular metal sleeve is made of high-compressive-strength rubber, which increases the vibration damping effect and reduces noise.

5. A multi-directional anti-creep device for curved beam bridges according to claim 1, characterized in that: Any single member can decompose, cancel out, and constrain the relative forces generated between the upper and lower structures.

6. A multi-directional anti-creep device for curved beam bridges according to claim 1, characterized in that: The device is adjustable in length, simple in structure and installation, and can be applied to curved beam bridges with different types of superstructures and substructures.

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