大跨度空间结构考虑行波效应的地震动随机响应分析

Random Seismic Responses of Long-span Spatial Structures under excitation of traveling waves

《建筑结构抗震设计规范》(GB50011-2001)中所采用的地震反应分析方法没有考虑地震激励的空间变化效应,本文针对此建立了考虑地震动行波效应的大跨度空间结构地震反应分析方法,并对一五跨钢筋混凝土连续梁桥进行了行波激励下地震反应的有限元数值模拟,并与常规反应谱方法及一致地震激励的计算结果进行了比较,结果表明单独考虑地震动空间效应中的行波效应对大跨结构地震响应影响显著。

In this paper, the methods of seismic response analysis for long -span structure under traveling wave are established. And the seismic responses of a five-spans continuous rigid- flamed bridge is numerically simulated under traveling wave effects, compared with the result under the coincident earthquake excitation. And the results indicate that the seismic responses of long- span structure will he great affected under excitation of traveling wave.