考虑支座破坏的连续梁桥地震反应分析
|
摘要
梁式桥在强震作用下的梁间碰撞、落梁乃至倒塌往往与支座破坏的状态紧密相关。在一些桥梁的地震反应分析中,若不考虑支座破坏的影响,往往会造成结构分析上的错误和设计上的不合理。从支座的震害现象入手,分析支座的震害特点,并在此基础上提出用于桥梁整体地震反应分析中,常用支座考虑破坏过程的恢复力模型。通过对一座6跨连续梁桥的地震反应的数值模拟,对比分析考虑支座破坏与否对桥梁主梁位移和桥墩抗力的影响并验证所提模型的合理性。
The impact between girders,unseating and even collapse of girder bridges under strong earthquake motion always closely related to the state of bearing damage.In some earthquake response analysis of bridge,if we do not take account of bearing failure,the error of structural analysis and the unreasonable in design will be made.This paper firstly summarizes the earthquake damage of bearing,then category the damage modes by the characteristics of the current common bearing.On this basis,the restoring force model of bearing taking account of failure is proposed for earthquake response analysis of whole bridge.By the numerical simulation of earthquake response for a 6-span continuous bridge,the influences of failure of bearings on the displacement of girder and the endurance of pier are analyzed,and the rationality of the proposed model is tested.
The impact between girders,unseating and even collapse of girder bridges under strong earthquake motion always closely related to the state of bearing damage.In some earthquake response analysis of bridge,if we do not take account of bearing failure,the error of structural analysis and the unreasonable in design will be made.This paper firstly summarizes the earthquake damage of bearing,then category the damage modes by the characteristics of the current common bearing.On this basis,the restoring force model of bearing taking account of failure is proposed for earthquake response analysis of whole bridge.By the numerical simulation of earthquake response for a 6-span continuous bridge,the influences of failure of bearings on the displacement of girder and the endurance of pier are analyzed,and the rationality of the proposed model is tested.
引文
[1]Iemura H,Miyamoto A,Takahashi Y.Influence of failure of steel bearings on damage modes of bridges under strong earthquake motion[J].Journal of Structural Engineering,1998,44A:659-666(in Japanese)
[2]Kajita Y,Watanabe E,Sugiura K,et al.Seismic response of elevated bridges considering the failure of steel bridges and assessment on effectiveness of fall-off prevention devices[J].Journal of Structural Engineering,1999,45A:903-914(in Japanese)
[3]Okazaki M,Tsuda H,Dogaki M.Seismic response of continuous bridges supported by seismic-isolation bearings in consideration of collision between girders[J].Journal of Structural Engineering,2002,48A:899-907(in Japanese)
[4]Okazaki M,Tsuda H,Dogaki M.Seismic response of continuous bridges supported by seismic-isolation bearings taking account of steel bearing failure[J].Journal of Structural Engineering,2003,49A:553-561(in Japanese)
[5]Kim S,Mha H,Lee S.Effects of bearing damage upon seismic behaviors of a multi-span girder bridge[J].Engineering Structures,2006,28:1071-1080
[6]谢旭,吴善幸.考虑支座破坏影响的防止落梁装置地震响应[J].浙江大学学报,2006,40(12):2180-2185(Xie Xu,Wu Shanxing.Earthquake response of bridge restrainers considering failure of bearings[J].Journal of Zhejiang University,2006,40(12):2180-2185(in Chinese))
[7]刘恢先.唐山大地震震害[M].北京:地震出版社,1985
[8]阪神淡路大震災被害調査報告-[M].東京:(社)建設コンサルタンツ協会,1996
[9]胡德贵,吉随旺,李本伟.都江堰至汶川公路庙子坪岷江大桥震害浅析[J].西南公路,2008,108(4):20-24
[10]蒋劲松,庄卫林,刘振宇.汶川大地震百花大桥震害调查研究[J].西南公路,2008,108(4):1-7
[11]日本铁道技术综合研究所.铁道构造物等设计标准同解说—耐震设计[S].日本东京:丸善株式会社出版事业部,1999
[12]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(JTG/T B02—01—2008.Guidelines for seismic design of highway bridges[S].Beijing:China Communications Press,2008(in Chinese))
[2]Kajita Y,Watanabe E,Sugiura K,et al.Seismic response of elevated bridges considering the failure of steel bridges and assessment on effectiveness of fall-off prevention devices[J].Journal of Structural Engineering,1999,45A:903-914(in Japanese)
[3]Okazaki M,Tsuda H,Dogaki M.Seismic response of continuous bridges supported by seismic-isolation bearings in consideration of collision between girders[J].Journal of Structural Engineering,2002,48A:899-907(in Japanese)
[4]Okazaki M,Tsuda H,Dogaki M.Seismic response of continuous bridges supported by seismic-isolation bearings taking account of steel bearing failure[J].Journal of Structural Engineering,2003,49A:553-561(in Japanese)
[5]Kim S,Mha H,Lee S.Effects of bearing damage upon seismic behaviors of a multi-span girder bridge[J].Engineering Structures,2006,28:1071-1080
[6]谢旭,吴善幸.考虑支座破坏影响的防止落梁装置地震响应[J].浙江大学学报,2006,40(12):2180-2185(Xie Xu,Wu Shanxing.Earthquake response of bridge restrainers considering failure of bearings[J].Journal of Zhejiang University,2006,40(12):2180-2185(in Chinese))
[7]刘恢先.唐山大地震震害[M].北京:地震出版社,1985
[8]阪神淡路大震災被害調査報告-[M].東京:(社)建設コンサルタンツ協会,1996
[9]胡德贵,吉随旺,李本伟.都江堰至汶川公路庙子坪岷江大桥震害浅析[J].西南公路,2008,108(4):20-24
[10]蒋劲松,庄卫林,刘振宇.汶川大地震百花大桥震害调查研究[J].西南公路,2008,108(4):1-7
[11]日本铁道技术综合研究所.铁道构造物等设计标准同解说—耐震设计[S].日本东京:丸善株式会社出版事业部,1999
[12]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(JTG/T B02—01—2008.Guidelines for seismic design of highway bridges[S].Beijing:China Communications Press,2008(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