A through plane bending steel arch bridge structure

By introducing an adjustable support system into the under-bearing planar curved steel arch bridge structure, the problem of excessive concentrated stress in the fixed arch foot area was solved, achieving higher structural stability and load distribution effect, and improving the overall performance of the bridge.

CN224741416UActive Publication Date: 2026-09-11SHAN DONG JUXIN GRP STEEL STRUCTURE CO LTD
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Patent Information

Application Number
CN202521843230.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-08-28
Publication Date
2026-09-11
Estimated Expiration
2035-08-28

AI Technical Summary

Technical Problem

Existing under-deck planar curved steel arch bridge structures may experience excessive concentrated stress in the fixed arch foot area when subjected to complex curves or asymmetrical live loads, leading to localized fatigue damage.

Method used

The design incorporates an adjustable bottom support structure, including components such as support beams, grooves, sliders, lead screws, and moving blocks. The support height is infinitely adjustable through a threaded engagement mechanism. Combined with reinforcing ribs and support ribs, the structure distributes loads and counteracts lateral bending moments and torsional forces, thereby enhancing structural rigidity and resistance to deformation.

Benefits of technology

It improves the overall stiffness and deformation resistance of the bridge, prevents buckling, enhances local stability and load transfer efficiency, and extends the service life of the structure.

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Abstract

The utility model discloses a lower bearing type plane bending steel arch bridge beam structure, including steel roof, the top surface fixed mounting of steel roof has arch rib, the surface fixed mounting of arch rib has the reinforcing bar, the bottom surface fixed mounting of steel roof has the support beam, the surface of support beam has seted up the sliding slot, the surface fixed mounting of support beam has the fixed block, the inside plug -in of fixed block has the lead screw, the top fixed mounting of lead screw has the support block, the inside sliding connection of fixed block has the moving block, the side surface swing joint of moving block has the support rod, the bottom fixed mounting of support rod has the sliding block, through adjustable bottom support structure to strengthen the stability and adaptability of bridge, and the sliding slot of support beam bottom surface sets up and cooperates with the sliding block, and the support rod is allowed to move flexibly according to the stress condition to distribute load, and the height of support block can be adjusted to the lead screw and moving block, so that its top end is always in close contact with steel roof bottom surface, provides the continuous stable vertical support.
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