【摘要】 研究大跨度结构的地震响应时,有必要考虑地震波的行波效应。针对一种特殊的钢-混凝土组合拱桥进行地震响应研究。以重庆市万县长江大桥为建模依据,使用大型通用有限元软件sap2000建立跨径为420 m的钢-混凝土组合拱桥计算模型,并对该模型多种激励状态进行分析。在一致激励状态下进行几何非线性时程分析,并基于多点激振理论和相对位移法,采用7种不同的时差对计算模型进行行波效应下的地震响应分析。对比研究表明行波效应对大跨度桥梁结构地震响应有很大影响。更多还原

【Abstract】 In research on seismic response of large- span structures,it is necessary to consider traveling wave effect of seismic wave. This paper researches seismic response in allusion to a special steel- concrete combined arch bridge. With Chongqing Wan County Yangtze River Bridge as the basis for modeling,the paper establishes a computational model of steel- concrete combined arch bridge at a span of 420 m by means of large- scale universal finite element software sap2000,and analyzes multiple excited states of the model. The paper carries out geometric nonlinear time- history analysis in consistent excited states and seismic response analysis for the computational model under the traveling wave effect by means of 7different time differences. Comparative research shows that traveling wave effect exhibits great influences on seismic response of structures.更多还原