多点地震激励下大跨连续钢构桥易损性分析
|
摘要
针对地震动存在行波效应、场地效应、不相干效应等因素,分析大跨连续钢构桥在一致地震激励输入响应时结构内力和变形会被偏估问题,考虑结构及地震动不确定性,采用蒙特卡罗方法建立一致激励与多点激励两种工况下大跨连续钢构桥-地震动系统随机样本。以桥墩位移延性比表示桥梁破坏状态阶段,对桥梁易损性进行分析,给出大跨连续钢构桥结构的易损性曲线,得到同样程度破坏的多点地震激励与一致地震激励下加速度峰值关系。
Due to wave passage effect,incoherence effect,local effect and other factors in seismic ground motion, the internal force and deformation of long span continuous rigid framed bridges will be error-estimated when seismic responses analysis is performed under identical support ground motion excitations.A Monte Carlo simulation method was used to establish the random sample for the system of large-span continuous rigid frame bridge under ground motion excitation,by means of considering the uncertainties of structural material and ground motion,both for identical support ground motion excitations and multiple support ground motion excitations.The ductility ratio of piers was defined as the index of damage state of the bridge.The seismic fragility analysis was carried out under the two different modes of excitations and the fragility curves of the bridge were given based on the damage state definition.The peak acceleration relationship between the two different modes of excitations was obtained under the same level damage.
Due to wave passage effect,incoherence effect,local effect and other factors in seismic ground motion, the internal force and deformation of long span continuous rigid framed bridges will be error-estimated when seismic responses analysis is performed under identical support ground motion excitations.A Monte Carlo simulation method was used to establish the random sample for the system of large-span continuous rigid frame bridge under ground motion excitation,by means of considering the uncertainties of structural material and ground motion,both for identical support ground motion excitations and multiple support ground motion excitations.The ductility ratio of piers was defined as the index of damage state of the bridge.The seismic fragility analysis was carried out under the two different modes of excitations and the fragility curves of the bridge were given based on the damage state definition.The peak acceleration relationship between the two different modes of excitations was obtained under the same level damage.
引文
[1]王蕾,赵成钢,王智峰.考虑地形影响和多点激励的大跨高墩桥地震响应分析[J].土木工程学报,2006, 39(1):50-54. WANG Lei,ZHAO Cheng-gang,WANG Zhi-feng.Seismic responses analysis of continuous rigid-framed bridge with high piers considering topographic effects and multi-support excitations[J].China Civil Engineering Journal,2006, 39(I):50-54.
[2]刘洪兵,范立础.大跨桥梁考虑地形及多点激励的地震响应分析[J].同济大学学报,2003,31(6):641-646. LIU Hong-bing,FAN Li-chu.Seismic analysis of long span bridges considering topographic effects and multi-supported excitations[J].Journal of Tongji University,2003,31(6): 641 - 646.
[3]柳国环,李宏男,田利.九江长江大桥在多点多维地震激励下的反应分析[J].振动与冲击,2009,28(9): 224-230. LIU Guo-huan,LI Hong-nan,TIAN Li.Modeling vibration isolation system of an onboard machinery based on flexible multibody dynamics theory[J].Journal of Vibration and Shock,2009,28(9):224 - 230.
[4]李忠献,史志利.随机地震动场多点激励下大跨度连续钢构桥的地震反应分析[J].地震工程与工程振动, 2003,23(6):57-62. LI Zhong-xian,SHI Zhi-li.Seismic response analysis for long-span continuous rigid-framed bridges under multi-support excitations of random earthquake ground motions[J]. Earthquake Engineering and Engineering Vibration,2003, 23(6):57 -62.
[5]Hwang H,刘晶波.地震作用下钢筋混凝土桥梁结构易损??性分析[J].土木工程学报,2004,37(6):47-52. HWANG H,LIU Jing-bo.Seismic fragility analysis of reinforced concrete bridges[J].China Civil Engineering Journal,2004,37(6):4-7-52.
[6]杜鹏,姜慧,王东明.陇南公路总段桥梁震害及易损性分析[J].地震工程与工程振动,2010,30(4):103-108. DU Peng,JIANG Hui,WANG Dong-ming.Seismic damage and vulnerability analysis of bridges along longnan highway [J].Earthquake Engineering and Engineering Vibration, 2010,30(4):103 - 108.
[7]Kim S H,Feng M Q.Fragility analysis of bridges under ground motion with spatial variation[J].International Journal of NonLinear Mechanics,2003,38(5):705 -721.
[8]Erberik M A,Elnashai A S.Fragility analysis of flat-slab structures[J].Engineering Structures,2004,26(7 ): 937 - 948.
[9]刘晶波,刘阳冰,闫秋实,等.基于性能的方钢管混凝土框架结构地震易损性分析[J].土木工程学报,2010, 43(2):39-47. LIU Jing-bo,LIU Yang-bing,YAN Qiu-shi,et al. Performance-based seismic fragility analysis of CFST frame structures[J].China Civil Engineering Journal,2010, 43(2):39 -47.
[10]张瑾.地震动加速度模拟软件的开发与应用[D].北京:北京交通大学,2007.
[11]Washington D C.HAZUS99 user's manual[R].Federal Emergency Management Agency,1999.
[11]张菊辉.基于数值模拟的规则梁桥墩柱的地震易损性分析[D].上海:同济大学,2006.
[13]吕大钢,李晓鹏,张鹏,等.土木工程结构地震易损性分析的有限元可靠度方法[J].应用基础与工程科学学报,2006,14(S1):264-272. L(U|¨) Da-gang,LI Xiao-peng,ZHANG Peng,et al.Finite element reliability methods for seismic fragility analysis of civil engineering structures[J].Journal of Basic Science and Engineering,2006,14(S1):264- 272.
[2]刘洪兵,范立础.大跨桥梁考虑地形及多点激励的地震响应分析[J].同济大学学报,2003,31(6):641-646. LIU Hong-bing,FAN Li-chu.Seismic analysis of long span bridges considering topographic effects and multi-supported excitations[J].Journal of Tongji University,2003,31(6): 641 - 646.
[3]柳国环,李宏男,田利.九江长江大桥在多点多维地震激励下的反应分析[J].振动与冲击,2009,28(9): 224-230. LIU Guo-huan,LI Hong-nan,TIAN Li.Modeling vibration isolation system of an onboard machinery based on flexible multibody dynamics theory[J].Journal of Vibration and Shock,2009,28(9):224 - 230.
[4]李忠献,史志利.随机地震动场多点激励下大跨度连续钢构桥的地震反应分析[J].地震工程与工程振动, 2003,23(6):57-62. LI Zhong-xian,SHI Zhi-li.Seismic response analysis for long-span continuous rigid-framed bridges under multi-support excitations of random earthquake ground motions[J]. Earthquake Engineering and Engineering Vibration,2003, 23(6):57 -62.
[5]Hwang H,刘晶波.地震作用下钢筋混凝土桥梁结构易损??性分析[J].土木工程学报,2004,37(6):47-52. HWANG H,LIU Jing-bo.Seismic fragility analysis of reinforced concrete bridges[J].China Civil Engineering Journal,2004,37(6):4-7-52.
[6]杜鹏,姜慧,王东明.陇南公路总段桥梁震害及易损性分析[J].地震工程与工程振动,2010,30(4):103-108. DU Peng,JIANG Hui,WANG Dong-ming.Seismic damage and vulnerability analysis of bridges along longnan highway [J].Earthquake Engineering and Engineering Vibration, 2010,30(4):103 - 108.
[7]Kim S H,Feng M Q.Fragility analysis of bridges under ground motion with spatial variation[J].International Journal of NonLinear Mechanics,2003,38(5):705 -721.
[8]Erberik M A,Elnashai A S.Fragility analysis of flat-slab structures[J].Engineering Structures,2004,26(7 ): 937 - 948.
[9]刘晶波,刘阳冰,闫秋实,等.基于性能的方钢管混凝土框架结构地震易损性分析[J].土木工程学报,2010, 43(2):39-47. LIU Jing-bo,LIU Yang-bing,YAN Qiu-shi,et al. Performance-based seismic fragility analysis of CFST frame structures[J].China Civil Engineering Journal,2010, 43(2):39 -47.
[10]张瑾.地震动加速度模拟软件的开发与应用[D].北京:北京交通大学,2007.
[11]Washington D C.HAZUS99 user's manual[R].Federal Emergency Management Agency,1999.
[11]张菊辉.基于数值模拟的规则梁桥墩柱的地震易损性分析[D].上海:同济大学,2006.
[13]吕大钢,李晓鹏,张鹏,等.土木工程结构地震易损性分析的有限元可靠度方法[J].应用基础与工程科学学报,2006,14(S1):264-272. L(U|¨) Da-gang,LI Xiao-peng,ZHANG Peng,et al.Finite element reliability methods for seismic fragility analysis of civil engineering structures[J].Journal of Basic Science and Engineering,2006,14(S1):264- 272.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心