模态pushover分析方法的研究和改进
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摘要
鉴于传统pushover方法不能考虑结构高阶振型的贡献,从而难以应用到高层结构中,有学者提出采用考虑多阶振型组合作用的模态pushover分析方法。本文通过考虑结构屈服后地震作用发生变化这一特性,对此方法进行了改进并通过算例进行了验证。结果表明本文改进的方法有很好的精度。
Because the traditional pushover analysis can not take the contributions of higher modes into account,it is difficult to apply this method to high-rise structures.To overcome this limitation,a modal pushover analysis procedure(MPA) is proposed by some researchers,which can involve the combination of multi-mode contributions to response.In this paper,much improvement on MPA procedure is made with consideration of the redistribution of inertia forces after structural yielding.The method is verified by one example.It is concluded that the method presented in this paper has higher accuracy than MPA procedure.
Because the traditional pushover analysis can not take the contributions of higher modes into account,it is difficult to apply this method to high-rise structures.To overcome this limitation,a modal pushover analysis procedure(MPA) is proposed by some researchers,which can involve the combination of multi-mode contributions to response.In this paper,much improvement on MPA procedure is made with consideration of the redistribution of inertia forces after structural yielding.The method is verified by one example.It is concluded that the method presented in this paper has higher accuracy than MPA procedure.
引文
[1]Chopra AK,Goel RK.A modal pushover analysis procedure to estimate seism ic demands for bu ild ings:theory and prelim inary evaluation[R].Berkeley,CA:ReportNo.PEER 2001/03,Pacific Earthquake Engineering Research Center,Un iversity of Californ ia,2001.
[2]Chopra AK.Dynam ics of Structures[M].Theory and Applications to Earthquake Engineering(Second Ed ition).北京:清华大学出版社,影印本,2005.
[3]谢礼立,马玉宏.基于抗震性态的设防标准研究[J].地震学报,2002,24(2):200~209.
[4]王威.Pushover分析方法及等位移原理应用研究[D].哈尔滨:中国地震局工程力学研究所,2002.
[5]孙景江.钢筋混凝土结构地震反应分析和试验的若干研究[D].哈尔滨:中国地震局工程力学研究所,2001.
[6]Gupta B,M EER I,Kunnath SK.Adaptive spectra-based pushover procedure for seism ic evaluation of structures[J].Earthquake spectra,2000,16(2):367~391.
[7]Chopra AK,Goel RK,Chatpan Ch inatanapakdee.Evaluation of a mod ified mpa procedure assum ing h ighermodes as elastic to estimate seism icdemands[J].Earthquake.Spectra,2004,20(3):757~778.
[8]Chopra AK,GoelRK.A modal pushover analysis procedure for estimating seism ic demands for bu ild ings[J].Earthquake Engineering and Struc-tural Dynam ics,2002,31:561~582.
[9]汪大绥,贺军利,张凤新.静力弹塑性分析(Pushover Analysis)的基本原理和计算实例[J].世界地震工程,2004,20(1):45~53.
[10]屈成忠,谢礼立.性态点的数值解法[J].世界地震工程,2003,19(1):21~24.
[11]刘清山,梁兴文,黄雅捷.对结构静力弹塑性分析方法的几点改进[J].建筑科学,2005,21(4):28~33.
[12]周定松,吕西林.延性需求谱在基于性能的抗震设计中的应用[J].地震工程与工程振动,2004,24(1):30~38.
[13]尹华伟,汪梦甫,周锡元.结构静力弹塑性分析方法的研究和改进[J].工程力学,2003,20(4):46~49.
[2]Chopra AK.Dynam ics of Structures[M].Theory and Applications to Earthquake Engineering(Second Ed ition).北京:清华大学出版社,影印本,2005.
[3]谢礼立,马玉宏.基于抗震性态的设防标准研究[J].地震学报,2002,24(2):200~209.
[4]王威.Pushover分析方法及等位移原理应用研究[D].哈尔滨:中国地震局工程力学研究所,2002.
[5]孙景江.钢筋混凝土结构地震反应分析和试验的若干研究[D].哈尔滨:中国地震局工程力学研究所,2001.
[6]Gupta B,M EER I,Kunnath SK.Adaptive spectra-based pushover procedure for seism ic evaluation of structures[J].Earthquake spectra,2000,16(2):367~391.
[7]Chopra AK,Goel RK,Chatpan Ch inatanapakdee.Evaluation of a mod ified mpa procedure assum ing h ighermodes as elastic to estimate seism icdemands[J].Earthquake.Spectra,2004,20(3):757~778.
[8]Chopra AK,GoelRK.A modal pushover analysis procedure for estimating seism ic demands for bu ild ings[J].Earthquake Engineering and Struc-tural Dynam ics,2002,31:561~582.
[9]汪大绥,贺军利,张凤新.静力弹塑性分析(Pushover Analysis)的基本原理和计算实例[J].世界地震工程,2004,20(1):45~53.
[10]屈成忠,谢礼立.性态点的数值解法[J].世界地震工程,2003,19(1):21~24.
[11]刘清山,梁兴文,黄雅捷.对结构静力弹塑性分析方法的几点改进[J].建筑科学,2005,21(4):28~33.
[12]周定松,吕西林.延性需求谱在基于性能的抗震设计中的应用[J].地震工程与工程振动,2004,24(1):30~38.
[13]尹华伟,汪梦甫,周锡元.结构静力弹塑性分析方法的研究和改进[J].工程力学,2003,20(4):46~49.
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