Deck type steel arch bridge anti-seismic structure system

Abstract

The invention discloses a deck type steel arch bridge anti-seismic structure system, which comprises a main arch ring and a main beam, wherein the two ends of the main arch ring are fixed to a foundation through arch bases; the main beam at most comprises a coupling beam body in the vertical projection range of the main arch ring; the bottom of the main beam is rigidly connected with the arch crown of the main arch ring through arch crown short stand columns. Through rigid consolidation of the main beam on the arch and the main arch ring, when an earthquake occurs, huge earthquake force of the main beam is directly transmitted to the main arch ring and then transmitted to the foundation through the arch seat, the earthquake force transmission path is direct and efficient, the earthquake force borne by the column on the arch is reduced, the anti-seismic performance of the whole structure is improved, arrangement of a seismic mitigation and isolation system in conventional design is avoided, and the advantages of good economical efficiency, simple structure, convenience in construction, good structural durability and the like are achieved.

Description

technical field [0001] The invention belongs to the technical field of bridge construction engineering, and in particular relates to an anti-seismic structural system of an overhead steel arch bridge. Background technique [0002] Alpine and canyon areas are affected by the collision of continental plates, and the earthquake intensity is generally high. The upward-supported steel arch bridge has the advantages of beautiful appearance, convenient construction, high structural rigidity, excellent seismic performance, and good environmental adaptability. As a pressure-bearing structure, the main arch naturally adapts to the terrain of plateau mountainous valleys. have been widely applied in practice. [0003] The upper structure of the upwardly supported steel arch bridge mainly includes: the main arch ring, the upper column of the arch and the main girder, among which the main arch ring has high rigidity and strong seismic performance. For arch structures (arch columns and m...

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems existing in the prior art such as low seismic efficiency, complex construction process, and high cost of the upwardly supported steel arch bridge, the present invention provides an upwardly supported steel arch bridge seismic structure system, which can adapt to In plateau strong earthquake areas, it can effectively improve the overall anti-seismic performance and anti-earthquake and disaster reduction capabilities of the steel arch bridge, eliminate weak links in the anti-seismic structure, and has the advantages of simple structure, convenient implementation, and low cost.

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