改进的适应谱Pushover方法评价桥梁结构的抗震性能
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摘要
利用完全解耦的方法对适应谱Pushover方法进行简化,建立了更适于工程实际应用的改进的适应谱Pushover方法(IASPA法).利用该方法对四种典型地震动作用下的桥墩进行计算分析,并将计算结果与倒三角分布模式、均匀分布模式的Pushover分析的结果和非线性时程分析的结果进行对比研究.结果表明,改进的适应谱Pushover方法比其它两种Pushover方法的计算结果更接近于非线性时程分析的结果,从而验证了该方法的有效性.
The principal objective of this investigation is to develop an improved adaptive spectra-based pushover analysis procedure (IASPA) which applies to the engineering practice. The seismic performance of a pier determined by IASPA was compared with that determined by the pushover analysis using two force distributions in FEMA274 which are linear distribution and uniform distribution, and IASPA procedure was compared with nonlinear RHA procedures. The results indicate that the IASPA method provides more superior accuracy in estimating the seismic performance of bridge structures.
The principal objective of this investigation is to develop an improved adaptive spectra-based pushover analysis procedure (IASPA) which applies to the engineering practice. The seismic performance of a pier determined by IASPA was compared with that determined by the pushover analysis using two force distributions in FEMA274 which are linear distribution and uniform distribution, and IASPA procedure was compared with nonlinear RHA procedures. The results indicate that the IASPA method provides more superior accuracy in estimating the seismic performance of bridge structures.
引文
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[4]侯爽,欧进萍.结构Pushover分析的侧向力分布及高阶振型影响[J].地震工程与工程振动,2004,24(3):89-97.
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[7]FEMA273,FEMA274.NEHRP commentary on the guidelines for the rehabilitation of building[R].Wash-ington D C:Federal Emergency Management Agency,1996.
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[11]VALLES R E,REINHORN A M,Kunnath S.K,et al.IDARC2D Version4.0:a program for the inelastic damage analysis of buildings[R].Report No.NCEER-96-0010,National Center for Earthquake En-gineering Research,State University of New York at Buffalo,1996.
[12]魏巍.几种push-over分析方法对比研究[D].哈尔滨:中国地震局工程力学研究所,2001.
[2]BRACCI J M,KUNNATH S K,REINHORN A M.Seismic performance and retrofit evaluation for rein-forced concrete structures[J].Journal of Structural En-gineering,ASCE1997,123(1):3-10.
[3]GUPTA B,EERI M,KUNNATH S K.Adaptive spec-tra-based pushover procedure for seismic evaluation of structures[J].Earthquake Spectra,2000,16(2):367-391.
[4]侯爽,欧进萍.结构Pushover分析的侧向力分布及高阶振型影响[J].地震工程与工程振动,2004,24(3):89-97.
[5]CHOPRA A K,GOEL R K.A modal pushover analysis procedure for estimating seismic demands for buildings[J].Earthquake Engineering and Structural Dynamics,2002,31:561-582.
[6]CHOPRA A K,GOEL R K.A modal pushover analysis procedure to estimate seismic demands for buildings:theory and preliminary evaluation[R].Berkeley:Re-port No.PEER-2001/03,Pacific Earthquake Engineer-ing Research Center,University of California,2001.
[7]FEMA273,FEMA274.NEHRP commentary on the guidelines for the rehabilitation of building[R].Wash-ington D C:Federal Emergency Management Agency,1996.
[8]中国工程建设标准化协会.建筑工程抗震性态设计通则(试用)[S].中国计划出版社,2004.
[9]范立础,卓卫东.桥梁延性抗震设计[M].北京:人民交通出版社,2001.
[10]王东升,翟桐,郭明珠.利用Push-over方法评价桥梁的抗震安全性[J].世界地震工程,2000,16(2):47-51.
[11]VALLES R E,REINHORN A M,Kunnath S.K,et al.IDARC2D Version4.0:a program for the inelastic damage analysis of buildings[R].Report No.NCEER-96-0010,National Center for Earthquake En-gineering Research,State University of New York at Buffalo,1996.
[12]魏巍.几种push-over分析方法对比研究[D].哈尔滨:中国地震局工程力学研究所,2001.
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