LRB体系连续梁桥的隔震性能分析
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摘要
结合世界上首座采用铅芯橡胶隔震支座的双层交通双层桥面隔震的连续梁桥———广东东莞东江大桥双层墩隔震引桥,采用有限元和自编程序,研究了铅芯橡胶支座(LRB)体系连续梁桥的隔震性能.结果表明:LRB体系连续梁桥的固有特性决定了其具有非常好的行车舒适度;桩-土共同作用时,梁桥仍然具有非常良好的隔震性能;在制动力、风荷载和温度作用下完全能够满足正常使用的要求;必须对其进行地震作用下的碰撞分析;墩较高、大震位移较大时,需验算其动力稳定性.
The isolation performance of LRB continuous girder bridges were studied by finite element and self-compiling program,taken the world′s first double traffic double deck isolated continuous girder bridge,Dongjiang double-layer-pier isolated approach bridge at Dongguan in Guangdong province,as an example.The results show that,LRB continuous girder bridges have very good riding comfort,without checking,which is determined by there own inherent characteristics;when pile-soil interaction is considered,they still have very good isolation performances;they are fully able to meet the requirements of normal use under braking,wind loads and temperature;pounding by seismic must be analyzed;dynamic stability needs checking when higher pier and larger earthquake displacement.The isolation performance of LRB continuous girder bridges is systematically studied from different indicators for the first time in this paper,and have profound significance for popularization of LRB continuous girder bridges.
The isolation performance of LRB continuous girder bridges were studied by finite element and self-compiling program,taken the world′s first double traffic double deck isolated continuous girder bridge,Dongjiang double-layer-pier isolated approach bridge at Dongguan in Guangdong province,as an example.The results show that,LRB continuous girder bridges have very good riding comfort,without checking,which is determined by there own inherent characteristics;when pile-soil interaction is considered,they still have very good isolation performances;they are fully able to meet the requirements of normal use under braking,wind loads and temperature;pounding by seismic must be analyzed;dynamic stability needs checking when higher pier and larger earthquake displacement.The isolation performance of LRB continuous girder bridges is systematically studied from different indicators for the first time in this paper,and have profound significance for popularization of LRB continuous girder bridges.
引文
[1]范立础,王志强.桥梁减隔震设计[M].北京:人民交通出版社,2001.
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[3]Liao WI,Loh C H,Wan S J.Dynamic response ofbridges subjected to near-fault ground motions[J].Journal of Chinese Institute of Engineering,2000,23(4):455-464.
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[5]Pagnini L C,Solari.Stochastic analysis of the linearequivalent response of bridge piers with aseismic de-vice[J].Journal of Structural Engineering and Struc-tural Dynamic,1999,28(5):543-560.
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[7]李黎,叶志雄,王欣.移动荷载作用下特大悬索桥的行车舒适性[J].公路交通科技,2007,24(9):46-50.
[8]李忠献,岳福青.城市桥梁地震碰撞反应研究与发展[J].地震工程与工程振动,2005,25(4):91-98.
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[10]Jankowski R,Wilde K,Fujino Y.Reduction ofpounding effects in elevated bridges during earth-quakes[J].Earthquake Engineering,2000,29(2):195-212.
[11]李黎,叶志雄,吴王景.隔震连续梁桥地震作用下梁间碰撞响应的研究[J].公路交通科技,2009,26(7):100-104.
[12]重庆交通科研设计院.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.
[13]李黎,张行,龙晓鸿.地震作用下高墩大跨连续刚构桥的弹性动力稳定性能研究[J].工程抗震与加固改造,2008,30(6):84-88.
[14]刘洁,刘强,祝志文.柳林大桥主墩群桩基础等效动力刚度计算模拟[J].山西建筑,2009,34(20):7-8.
[15]中交公路规划设计院.JTGD63—2007公路桥涵地基与基础设计规范[S].北京:人民交通出版社,2007.
[16]龙晓鸿,李黎.桩-土共同作用时连续梁桥隔震时程分析[J].中国市政工程,2006,121(3):20-23.
[17]刘云贺,赵晓娟,王克成.土-结构相互作用对LRB减震桥梁影响的分析[J].西安理工大学学报,2003,19(1):13-17.
[18]中交公路规划设计字.JTGD60—2004公路桥涵设计通用规范[S].北京:人民交通出版社,2004.
[2]范立础.桥梁抗震[M].上海:同济大学出版社,1997.
[3]Liao WI,Loh C H,Wan S J.Dynamic response ofbridges subjected to near-fault ground motions[J].Journal of Chinese Institute of Engineering,2000,23(4):455-464.
[4]Ghobarah A,Ali J M.Seismic performance of high-way bridges[J].Engineering Structure,1998,10(1):157-166.
[5]Pagnini L C,Solari.Stochastic analysis of the linearequivalent response of bridge piers with aseismic de-vice[J].Journal of Structural Engineering and Struc-tural Dynamic,1999,28(5):543-560.
[6]Chatterjee P K,Dattatk,Surana C S.Vibration ofcontinuous bridges under moving vehicles[J].Journalof Sound and Vibration,1994,165(5):619-634.
[7]李黎,叶志雄,王欣.移动荷载作用下特大悬索桥的行车舒适性[J].公路交通科技,2007,24(9):46-50.
[8]李忠献,岳福青.城市桥梁地震碰撞反应研究与发展[J].地震工程与工程振动,2005,25(4):91-98.
[9]王东升,冯启民,王国新.基于直杆共轴碰撞理论的桥梁地震反应邻梁碰撞分析模型[J].工程力学,2004,21(2):157-166.
[10]Jankowski R,Wilde K,Fujino Y.Reduction ofpounding effects in elevated bridges during earth-quakes[J].Earthquake Engineering,2000,29(2):195-212.
[11]李黎,叶志雄,吴王景.隔震连续梁桥地震作用下梁间碰撞响应的研究[J].公路交通科技,2009,26(7):100-104.
[12]重庆交通科研设计院.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.
[13]李黎,张行,龙晓鸿.地震作用下高墩大跨连续刚构桥的弹性动力稳定性能研究[J].工程抗震与加固改造,2008,30(6):84-88.
[14]刘洁,刘强,祝志文.柳林大桥主墩群桩基础等效动力刚度计算模拟[J].山西建筑,2009,34(20):7-8.
[15]中交公路规划设计院.JTGD63—2007公路桥涵地基与基础设计规范[S].北京:人民交通出版社,2007.
[16]龙晓鸿,李黎.桩-土共同作用时连续梁桥隔震时程分析[J].中国市政工程,2006,121(3):20-23.
[17]刘云贺,赵晓娟,王克成.土-结构相互作用对LRB减震桥梁影响的分析[J].西安理工大学学报,2003,19(1):13-17.
[18]中交公路规划设计字.JTGD60—2004公路桥涵设计通用规范[S].北京:人民交通出版社,2004.
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