连梁装置在地震序列作用下的作动分析
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摘要
地震荷载是一种随机荷载,桥梁结构受到罕遇或超预期地震作用时,抗震措施能够有效地减小地震荷载的破坏程度。连梁装置是公路桥梁防落梁系统中的最终安全保护措施,用于避免桥梁上、下部结构相对位移过大、支座丧失支承功能后发生落梁。结合国内外连梁装置的相关设计标准,对设拉索式连梁装置的结构进行罕遇地震及强震序列动力时程分析,得出连梁装置的防落梁效果及内力随其拉索长度、设计位移量的变化规律。在地震作用下,经合理设计的连梁装置起到防落梁效果,增大结构的整体性、提高结构的抗推刚度,使地震荷载在各墩间平均分配。连梁装置在整个强震序列激励过程中均起到防落梁作用,可保证有损结构的通行能力,达到"大震不倒"的抗震设计原则。
Earthquake load has the character of random.The uses of anti-seismic measures have been proved to be effective on the reduction of bridge seismic damage when the bridges encounter with rare earthquake or unexpected earthquake.Unseating prevention devices are the ultimate security installment in the collapse-proof system,which used to protect the substructure falling down from piers as the supports lose their effectiveness.Based on relational design standards at home and abroad,time-history analysis has been conducted on the structure with cable-unseating prevention devices under rare earthquake and strong earthquake sequence.The variation laws involving the collapse-proof result of unseating prevention devices and effect of collapse-proof changing with both cable length and designed value for displacement have been obtained.Under rare earthquake,the rational unseating prevention devices could provide the ultimate security to the structure,increase the integrity and anti-pushing rigidity of the structure,and make the seismic load to be well-distributed among the piers.The unseating prevention devices are able to provide the ultimate security for the damaging structure under the strong earthquake sequence;and achieve the request that there is no collapse when strong earthquake occurs.
Earthquake load has the character of random.The uses of anti-seismic measures have been proved to be effective on the reduction of bridge seismic damage when the bridges encounter with rare earthquake or unexpected earthquake.Unseating prevention devices are the ultimate security installment in the collapse-proof system,which used to protect the substructure falling down from piers as the supports lose their effectiveness.Based on relational design standards at home and abroad,time-history analysis has been conducted on the structure with cable-unseating prevention devices under rare earthquake and strong earthquake sequence.The variation laws involving the collapse-proof result of unseating prevention devices and effect of collapse-proof changing with both cable length and designed value for displacement have been obtained.Under rare earthquake,the rational unseating prevention devices could provide the ultimate security to the structure,increase the integrity and anti-pushing rigidity of the structure,and make the seismic load to be well-distributed among the piers.The unseating prevention devices are able to provide the ultimate security for the damaging structure under the strong earthquake sequence;and achieve the request that there is no collapse when strong earthquake occurs.
引文
[1]周仕勇,许忠淮.地震序列研究综述[J].中国地震.1999,15(3):267277.Zhou Shiyong,Xu Zhonghuai.Earthquake Research in China,1999,15(3):267-277.
[2]钟羽云,张震峰,张帆.不同地震序列类型地震的特征性质研究[J].防灾减灾工程学报,2005,25(2):205-209.Zhong Yuyun,Zhang Zhenfeng,Zhang Fan.Journal of Disaster Prevention and Mitigation Engineering,2005,25(2):205-209.
[3]丁文胜.下承式刚架系杆拱桥的抗震设计方法及试验研究[D].南京:东南大学,2006.Ding Wensheng.Seismic design method and experimental study on rigidframe through tied-arch bridges[D].Nanjing:Southeast University,2006.
[4]重庆交通科研设计院.JTG/T B02-01-2008公路桥梁抗震设计细则[S].2008,北京:人民交通出版社.Chongqing Communications Research&Design Institute.JTG/T B0201-2008Guidelines for resistant design for highway bridges[S].Beijing:China Communications Press,2008.
[5]孙旻,曹辉,宋峰.提高多震区建筑物抗震能力——保证地震安全的最佳选择[J].自然灾害学,2005,14(5):110-112.Sun Min,Cao Hui,Song Feng.Journal of Natural Disasters,2005,14(5):110-112.
[6]Japan Road Association.Design specification of highway bridges,Part V:Seismic design[S].Tokyo:Maruzen Publishing Company,2002.
[7]刘健新,胡兆同,李子青.公路桥梁减震装置及设计方法研究总报告[R].西安:长安大学,2000.Liu Jianxin,Hu Zhaotong,Li Ziqing.Research on design method and damping devices for bridge[R].Xi'an:Chang'an University,2000.
[8]张煜敏.考虑强震序列作用的连梁装置分析研究[D].西安:长安大学,2008.Zhang Yumin.The analysis of unseating prevention devices considering the excitation of strong earthquake sequence[D].Xi'an:Chang'an University,2008.
[9]朱文正,刘健新.公路桥梁连梁装置研究[J].公路交通科技,2009,26(4):68-72.Zhu Wenzheng,Liu Jianxin.Journal of Highway and Transportation Research and Development,2009,26(4):68-72.
[10]Randall M J,Saiidi M,Marragakis E M,et al.Restrainer design procedures for multi-span simply-supported bridges[R].MCEER-990011,Buffalo,NY:MCEER,1999.
[11]李春锋,张旸,赵金宝,等.台湾集集大地震及其余震的长周期地震动特性[J].地震学报,2006,28(4):417-428.Li Chunfeng,Zhang Yang,Zhao Jinbao,et al.Acta Seismologica Sinica,2006,28(4):417-428.
[2]钟羽云,张震峰,张帆.不同地震序列类型地震的特征性质研究[J].防灾减灾工程学报,2005,25(2):205-209.Zhong Yuyun,Zhang Zhenfeng,Zhang Fan.Journal of Disaster Prevention and Mitigation Engineering,2005,25(2):205-209.
[3]丁文胜.下承式刚架系杆拱桥的抗震设计方法及试验研究[D].南京:东南大学,2006.Ding Wensheng.Seismic design method and experimental study on rigidframe through tied-arch bridges[D].Nanjing:Southeast University,2006.
[4]重庆交通科研设计院.JTG/T B02-01-2008公路桥梁抗震设计细则[S].2008,北京:人民交通出版社.Chongqing Communications Research&Design Institute.JTG/T B0201-2008Guidelines for resistant design for highway bridges[S].Beijing:China Communications Press,2008.
[5]孙旻,曹辉,宋峰.提高多震区建筑物抗震能力——保证地震安全的最佳选择[J].自然灾害学,2005,14(5):110-112.Sun Min,Cao Hui,Song Feng.Journal of Natural Disasters,2005,14(5):110-112.
[6]Japan Road Association.Design specification of highway bridges,Part V:Seismic design[S].Tokyo:Maruzen Publishing Company,2002.
[7]刘健新,胡兆同,李子青.公路桥梁减震装置及设计方法研究总报告[R].西安:长安大学,2000.Liu Jianxin,Hu Zhaotong,Li Ziqing.Research on design method and damping devices for bridge[R].Xi'an:Chang'an University,2000.
[8]张煜敏.考虑强震序列作用的连梁装置分析研究[D].西安:长安大学,2008.Zhang Yumin.The analysis of unseating prevention devices considering the excitation of strong earthquake sequence[D].Xi'an:Chang'an University,2008.
[9]朱文正,刘健新.公路桥梁连梁装置研究[J].公路交通科技,2009,26(4):68-72.Zhu Wenzheng,Liu Jianxin.Journal of Highway and Transportation Research and Development,2009,26(4):68-72.
[10]Randall M J,Saiidi M,Marragakis E M,et al.Restrainer design procedures for multi-span simply-supported bridges[R].MCEER-990011,Buffalo,NY:MCEER,1999.
[11]李春锋,张旸,赵金宝,等.台湾集集大地震及其余震的长周期地震动特性[J].地震学报,2006,28(4):417-428.Li Chunfeng,Zhang Yang,Zhao Jinbao,et al.Acta Seismologica Sinica,2006,28(4):417-428.
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