Bidirectional limiting and damping device for adjacent beam ends of bridge

CN120683789APending Publication Date: 2025-09-23TIANJIN CHENGJIAN UNIV
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Patent Information

Application Number
CN202511121344.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-12
Publication Date
2025-09-23

AI Technical Summary

Technical Problem

Existing bridge structures lack effective two-way limiting and self-resetting devices during earthquakes, resulting in excessive displacement between beams, which may cause collisions and falling beams, and existing shock-absorbing devices are difficult to effectively absorb earthquake energy.

Method used

It adopts high-strength coil spring components, shock-absorbing and anti-fall gas pressure balance bar device and expansion joint waterproof and crack-resistant structure. The high-strength coil spring absorbs energy, the anti-fall gas pressure balance bar buffers displacement, and the expansion joint waterproof and crack-resistant structure prevents water erosion and structural damage.

Benefits of technology

It effectively limits the longitudinal and lateral displacement of the bridge, absorbs earthquake energy, prevents beams from falling, maintains structural integrity, facilitates maintenance after an earthquake, and prevents water erosion and structural damage.

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Abstract

The invention discloses a two-way limiting and damping device for adjacent beam ends of a bridge, and relates to the technical field of bridge seismic resistance, the two-way limiting and damping device comprises a main beam, a support, a high-strength spiral spring assembly, a damping anti-falling air pressure balance rod device and an expansion joint waterproof anti-crack structure, dovetail grooves are formed in the two ends of the main beam, and mounting extension plates are arranged on the two sides of the support; the two sides of the high-strength spiral spring assembly are fixedly connected to the middles of the cross sections of the adjacent main beams and penetrate through the expansion joint areas of the main beams in the longitudinal direction of the bridge, the damping anti-falling air pressure balance rod device is fixedly connected to the dovetail groove, and the space between the adjacent main beams is filled with the expansion joint waterproof anti-crack structure which penetrates through the expansion joint areas of the main beams in the transverse direction of the bridge. Relative displacement of a beam body and a bridge pier can be limited under the condition of a large earthquake, the beam falling phenomenon is avoided, energy is absorbed through the high-strength spiral spring assemblies, so that damage of the earthquake to a bridge is reduced, and earthquake energy is absorbed.
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