汶川地震中小半径曲线连续梁桥震害机理分析
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摘要
汶川地震中,小半径曲线连续梁桥遭受了不同程度的震害。本文针对其中震害严重的小黄沟中桥,进行了地震反应分析,讨论了其震害机理,研究了不同的下部结构形式以及固定墩上下部结构不同的连接方式对该类桥梁抗震性能的影响,提出了提高小半径曲线连续梁桥抗震能力的对策建议。
During the Wenchuan earthquake,many small radius curve continuous beam bridges were damaged on varying degrees. Earthquake response analysis for the Xiaohuanggou Bridge,which was damaged seriously,was made in this paper,and earthquake damage mechanism was discussed. Different seismic performance for different substructure and different connection type on fixed piers were studied. A new method uses proper constructional measure to change the transmission of earthquake energy,reduce the relative displacement between superstructure and substructure,assure the safety of substructure,to avoid earthquake damage.
During the Wenchuan earthquake,many small radius curve continuous beam bridges were damaged on varying degrees. Earthquake response analysis for the Xiaohuanggou Bridge,which was damaged seriously,was made in this paper,and earthquake damage mechanism was discussed. Different seismic performance for different substructure and different connection type on fixed piers were studied. A new method uses proper constructional measure to change the transmission of earthquake energy,reduce the relative displacement between superstructure and substructure,assure the safety of substructure,to avoid earthquake damage.
引文
[1]陈乐生,庄卫林,赵河清,等.汶川地震公路震害调查—桥梁[M].北京:人民交通出版社,2012.CHEN Lesheng,ZHUANG Weilin,ZHAO Heqing,et al.Report on Highways’Damage in the Wenchuan Earthquake-Bridge[M].Beijing:China Communications Press,2012.(in Chinese)
[2]JTG/T B02-01-2008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)
[3]中华人民共和国住房和城乡建设部.城市轨道交通结构抗震设计规范[S].北京:中国计划出版社,2013.Ministry of Housing and urban-rural development of the People's Republic of China.Code for seismic design of urban rail transit structures[S].Beijing:China Planning Press.2013.(in Chinese)
[4]黄勇.汶川地震中梁式桥的震害规律和预防震害的新方法[J].地震工程与工程振动,2008,28(5):20-26.HUANG Yong.The performance of girder bridges in Wenchuan Earthquake and a new method for seismic protection[J].Journal of Earthquake Engineering and Engineering Vibration,2008,28(5):20-26.(in Chinese)
[5]ZHANG Hua,LI Jianzhong,M.SAIIDI.Evaluation of performance of a skew bridge in Wenchuan 2008 Earthquake[C].Proceeding of International Symposium on Engineering Lessons Learned from the 2011 Great East Japan Earthquake,March 1-4,2012,Tokyo,Japan.1439-1450.
[2]JTG/T B02-01-2008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)
[3]中华人民共和国住房和城乡建设部.城市轨道交通结构抗震设计规范[S].北京:中国计划出版社,2013.Ministry of Housing and urban-rural development of the People's Republic of China.Code for seismic design of urban rail transit structures[S].Beijing:China Planning Press.2013.(in Chinese)
[4]黄勇.汶川地震中梁式桥的震害规律和预防震害的新方法[J].地震工程与工程振动,2008,28(5):20-26.HUANG Yong.The performance of girder bridges in Wenchuan Earthquake and a new method for seismic protection[J].Journal of Earthquake Engineering and Engineering Vibration,2008,28(5):20-26.(in Chinese)
[5]ZHANG Hua,LI Jianzhong,M.SAIIDI.Evaluation of performance of a skew bridge in Wenchuan 2008 Earthquake[C].Proceeding of International Symposium on Engineering Lessons Learned from the 2011 Great East Japan Earthquake,March 1-4,2012,Tokyo,Japan.1439-1450.
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