板式橡胶支座地震易损性分析
|
摘要
以一中等跨径连续梁桥为研究对象,建立了橡胶支座的滞回特性曲线以及全桥非线性动力分析模型.从太平洋地震工程研究中心(PEER)强震数据库中选取100条地震波,进行了一系列非线性时程分析,得到了橡胶支座的位移反应.根据基于性能的抗震设计思想和地震易损性分析理论,提出了板式橡胶支座4种不同损伤状态损伤指标的确定方法,并由此拟合了谱加速度与支座相对位移延性比之间的关系.基于传统可靠度概率方法,建立了橡胶支座的易损性曲线.分析结果表明,支座在地震作用下的易损性较其他构件更严重,且桥台支座比桥墩支座更容易遭受损坏;增加支座橡胶层厚度或改用聚四氟乙烯滑板支座能很好地改善桥台支座的抗震性能.
Taking a mid-span continuous bridge as the research subject,the restoring force model of rubber bearing and the dynamical model of nonlinear analysis were established.Also,100 earthquake wave records were chosen from PEER to conduct a series of nonlinear time-history analyses,and the relative displacement responses of rubber bearings were obtained.Based on the principle of Performance-Based Seismic Design and the theory of seismic vulnerability analysis,a method for determining four different damage indexes of laminated rubber bearing was proposed.According to traditional reliability probability analysis method,a curve between the spectral acceleration and the relative displacement ductility ratios of bearings was fitted,and the fragility curves of different bearings were formed.The results have demonstrated that bearing,especially the bearing on abutment,is more vulnerable than other bridge members under earthquake.Therefore,the seismic performance of bearing will be greatly improved if the thickness of rubber bearings is heightened or the PTFE sliding rubber bearings are adopted for abutment bearing.
Taking a mid-span continuous bridge as the research subject,the restoring force model of rubber bearing and the dynamical model of nonlinear analysis were established.Also,100 earthquake wave records were chosen from PEER to conduct a series of nonlinear time-history analyses,and the relative displacement responses of rubber bearings were obtained.Based on the principle of Performance-Based Seismic Design and the theory of seismic vulnerability analysis,a method for determining four different damage indexes of laminated rubber bearing was proposed.According to traditional reliability probability analysis method,a curve between the spectral acceleration and the relative displacement ductility ratios of bearings was fitted,and the fragility curves of different bearings were formed.The results have demonstrated that bearing,especially the bearing on abutment,is more vulnerable than other bridge members under earthquake.Therefore,the seismic performance of bearing will be greatly improved if the thickness of rubber bearings is heightened or the PTFE sliding rubber bearings are adopted for abutment bearing.
引文
[1]李建中,廖元裳,王克丽.桥梁的减震设计与分析[J].桥梁建设,1998(1):10-13.LI Jian-zhong,LIAO Yuan-shang,WANG Ke-li.Aseismic de-sign and analysis for bridges[J].Bridge Construction,1998(1):10-13.(In Chinese)
[2]谢旭.桥梁结构地震响应分析与抗震设计[M].北京:人民交通出版社,2006:309-310.XIE Xu.Seismic response and earthquake resistant design ofbridges[M].Beijing:China Communication Press,2006:309-310.(In Chinese)
[3]HWANG H,LIU J B,CHIU Y H.Seismic fragility analysisof highway bridges[R].University of Memphis,Memphis:Mid-America Earthquake Center Technical Report,MAEE-RR-4Project,2001.
[4]叶爱君,胡世德,范立础.桥梁支座抗震性能的模拟分析[J].同济大学学报,2001,29(1):6-9.YE Ai-jun,HU Shi-de,FAN Li-chu.Simulation of seismic be-havior for bridge bearings[J].Journal of Tongji University,2001,29(1):6-9.(In Chinese)
[5]范立础.桥梁抗震[M].上海:同济大学出版社,1997:206-208.FAN Li-chu.Bridge aseismatic[M].Shanghai:Tongji Universi-ty Press,1997:206-208.(In Chinese)
[6]中华人民共和国交通部.JTG/TB02-01-2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.The Ministry of Communications of the People’s Republic ofChina.JTG/TB02-01-2008 Guidelines of seismic designof highway bridges[S].Beijing:China Communication Press,2008.(In Chinese)
[7]PARK Y J,ANG A H S.Mechanistic seismic damage model forreinforced concrete[J].Journal of Structural Engineering,ASCE,1985,111(4):722-739.
[8]SHINOZUKA M,FENG M Q,LEE J,et al.Statistical analysisof fragility curves[J].Journal of Engineering Mechanics,ASCE,2000,126(2):1224-1231.
[9]CHOI E.Seismic analysis and retrofit of mid-America bridges[R].Georgia:Department of Civil and Environmental Engi-neering,Georgia Institute of Technology,2002.
[10]Federal Emergency Management Agency.HAZUS99user’smanual[M].Washington DC:Federal Emergency ManagementAgency,1999.
[11]范立础,王志强.桥梁减隔震设计[M].北京:人民交通出版社,2001:133-137.FAN Li-chu,WANG Zhi-qiang.Bridge isolation design[M].Beijing:China Communication Press,2008:133-137.(InChinese)
[12]PRIESTLEY M J N,SEIBLE F,CALVI G M.Seismic designand retrofit of bridges[M].New York:John Wiley&Sons,Inc,1996:314-315.
[13]中华人民共和国交通部.JT/T663-2006公路桥梁板式橡胶支座规格系列[S].北京:人民交通出版社,2007.The Ministry of Communications of the People’s Republic ofChina.JT/T663-2006 Series of elastomeric pad bearingsfor highway bridges[S].Beijing:China Communication Press,2007.(In Chinese)
[2]谢旭.桥梁结构地震响应分析与抗震设计[M].北京:人民交通出版社,2006:309-310.XIE Xu.Seismic response and earthquake resistant design ofbridges[M].Beijing:China Communication Press,2006:309-310.(In Chinese)
[3]HWANG H,LIU J B,CHIU Y H.Seismic fragility analysisof highway bridges[R].University of Memphis,Memphis:Mid-America Earthquake Center Technical Report,MAEE-RR-4Project,2001.
[4]叶爱君,胡世德,范立础.桥梁支座抗震性能的模拟分析[J].同济大学学报,2001,29(1):6-9.YE Ai-jun,HU Shi-de,FAN Li-chu.Simulation of seismic be-havior for bridge bearings[J].Journal of Tongji University,2001,29(1):6-9.(In Chinese)
[5]范立础.桥梁抗震[M].上海:同济大学出版社,1997:206-208.FAN Li-chu.Bridge aseismatic[M].Shanghai:Tongji Universi-ty Press,1997:206-208.(In Chinese)
[6]中华人民共和国交通部.JTG/TB02-01-2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.The Ministry of Communications of the People’s Republic ofChina.JTG/TB02-01-2008 Guidelines of seismic designof highway bridges[S].Beijing:China Communication Press,2008.(In Chinese)
[7]PARK Y J,ANG A H S.Mechanistic seismic damage model forreinforced concrete[J].Journal of Structural Engineering,ASCE,1985,111(4):722-739.
[8]SHINOZUKA M,FENG M Q,LEE J,et al.Statistical analysisof fragility curves[J].Journal of Engineering Mechanics,ASCE,2000,126(2):1224-1231.
[9]CHOI E.Seismic analysis and retrofit of mid-America bridges[R].Georgia:Department of Civil and Environmental Engi-neering,Georgia Institute of Technology,2002.
[10]Federal Emergency Management Agency.HAZUS99user’smanual[M].Washington DC:Federal Emergency ManagementAgency,1999.
[11]范立础,王志强.桥梁减隔震设计[M].北京:人民交通出版社,2001:133-137.FAN Li-chu,WANG Zhi-qiang.Bridge isolation design[M].Beijing:China Communication Press,2008:133-137.(InChinese)
[12]PRIESTLEY M J N,SEIBLE F,CALVI G M.Seismic designand retrofit of bridges[M].New York:John Wiley&Sons,Inc,1996:314-315.
[13]中华人民共和国交通部.JT/T663-2006公路桥梁板式橡胶支座规格系列[S].北京:人民交通出版社,2007.The Ministry of Communications of the People’s Republic ofChina.JT/T663-2006 Series of elastomeric pad bearingsfor highway bridges[S].Beijing:China Communication Press,2007.(In Chinese)
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