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以某座独塔单索面斜拉桥为研究对象,通过有限元软件MIDAS/CIVIL建立了全桥的空间有限元模型,并分别采用弹性时程分析和弹塑性时程分析方法,对其进行动力特性及地震动响应分析,分析可知弹性时程分析与弹塑性时程分析对于独塔斜拉桥的地震动响应结果不管是位移还是内力响应均有较明显差别,因此对于跨度较大的斜拉桥应当考虑其非线性因素,使模型的模拟更加符合实际结构,并通过综合弹塑性和弹性分析,得到相对可靠的结果。
Taking a single cable-stayed bridge with single tower as a research object, the finite element model of full bridge was established by using finite element software MIDAS / CIVIL. The elastic finite element model and the elasto-plastic time history analysis Dynamic characteristics and seismic response analysis, analysis shows that the elastic time-history analysis and elastoplastic time-history analysis of the results for the single tower cable-stayed bridge in the earthquake response is no matter whether the displacement or internal force response are more obvious differences, so for a larger span The bridge should consider its nonlinear factors, make the simulation of the model more accord with the actual structure, and obtain the relatively reliable result through the comprehensive elastoplastic and elastic analysis.