Taking a cable-stayed bridge project as background and using ANSYS procedure to make a 3-D finite element model,we take two pieces of usual seismic waves as excitations to study its seismic response.Furthermore,a comparison of structural response under long-period seismic waves and general seismic waves is developed,and also the long-period travelling effect of bridge structure is discussed.As a result,some conclusions which can be used in engineering are obtained.%以某大跨度斜拉桥为工程背景,采用ANSYS程序建立桥梁结构的三维有限元模型,选用两条典型的长周期地震波,对大跨桥梁结构进行地震反应分析,比较长周期地震波和普通地震波作用下桥梁结构反应的差异,探讨大跨桥梁结构的长周期行波效应问题。
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