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以穗盐路特大铁路桥为对象,对安装E型钢阻尼支座的独塔双索面曲线铁路斜拉桥的抗震性能进行了研究。建立了斜拉桥的动力有限元模型之后,考虑两种地震水平力的作用,采用反应谱法和非线性动力时程分析法对斜拉桥的抗震性能做了数值分析。研究表明,横向约束销钉剪断后,安装了E型钢阻尼支座的桥梁结构的地震内力响应相比无减震体系有较好的改善,且桥梁各代表截面及桩基础内力等的抗震验算均满足相应的抗震性能要求。
Taking Sui Yan Road superlarge railway bridge as an example, the seismic performance of single tower and double cable plane curved railway cable-stayed bridge with E-shaped steel damping support was studied. After establishing the dynamic finite element model of cable-stayed bridge, considering the effect of the two horizontal seismic forces, the seismic response of the cable-stayed bridge is analyzed numerically by using response spectrum method and nonlinear dynamic time-history method. The results show that the seismic response of the bridge structure with E-shaped steel damping bearing is better than that of the non-shock-absorbing system after the transverse restraining pin is cut, and the seismic tests of all representative sections of bridge and internal force of pile foundation satisfy The corresponding seismic performance requirements.