约束形式对高墩变截面钢桁架桥抗震性能影响的探讨

The Discussion on the Influence of Constraint Form on the Anti-seismic Performance of High Pier Cross-section Steel Truss Bridge

以某高墩上承式变高度钢桁架桥为工程背景,探讨了大震作用下墩梁固结、墩梁固定、墩梁间设置阻尼器3种模型对高墩大跨钢桁架结构抗震性能的影响,通过分析比较,结果表明设置阻尼器的减震模型在墩底横、顺桥向内力及墩顶位移方面均表现出一定的优越性。为今后该体系桥梁的设计提供参考。

Taking a high pier bearing type of variable height steel truss bridge as the engineering background, this paper discussed the influence of three models of pier beam consolidation, pier beam fixing,setting damper between pier and beam on the anti-seismic performance of high pier and large span steel truss structure under strong earthquake. Through the analysis and comparison, the results proved that the damping model setting damper showed some superiority in transverse and vertical bridge direction internal force of the pier bottom and displacement of the pier top, which provided some reference for the system design of the bridge in the future.