【摘要】 为对地下结构抗震分析方法进行探索,以南水北调工程某倒虹吸结构为背景,建立有限元分析模型,采用时程分析法计算倒虹吸结构在地震作用下的响应,并用修正的振型分解反应谱法来求解倒虹吸结构的动力响应,将反应谱法结果与时程分析法结果进行对比,结果表明,在一定条件下反应谱法与时程分析法的结果误差较小,可以作为地下结构抗震分析的计算方法。更多还原

【Abstract】 To explore the method of the seismic analysis for underground structures,taking one inverse siphon structure of South-to-North Water Transfer Project for example,the finite element analysis model is established,the method of time-history analysis is used to calculate the inverse siphon structure’s response under earthquake,and the modified mode decomposition response spectrum method is used to solve the dynamic response of inverse siphon structure.Comparing the result of response spectrum method with the result of time-history analysis method,it is shown that under certain conditions,the error between the results from two methods as mentioned above is small,so the response spectrum method could be used as the calculation method of the seismic analysis about underground structures.更多还原