修正的反应谱法地下结构抗震分析初探
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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。
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.
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.
引文
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[2]张存慧,马震岳,张运良,等.地震荷载作用下水电站厂房结构的震动应力分析[J].水电能源科学,2009,27(5):94-96.
[3]刘建峰.水电站地下厂房动力特性研究及地震反应分析[D].大连:大连理工大学,2007:37-44.
[4]胡志刚.大型水电站地下厂房结构振动计算研究[D].天津:天津大学,2003:61-69.
[5]孙明权,梁成彦,吴小飞.南水北调中线倒虹吸节制闸三向耦合地震响应模拟[J].水电能源科学,2011,29(1):61-63.
[6]郑人逢.倒虹吸结构温度及地震作用影响初探[D].南京:河海大学,2011:61-75.
[7]克拉夫.结构动力学[M].王光远,等译.第二版.北京:高等教育出版社,2006:95-102.
[8]ROY R.Craig,Jr.结构动力学[M].常岭,等译.北京:人民交通出版社,1996:259-278.
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