剪力键对隔震桥梁地震反应的影响
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摘要
减、隔震支座中增设剪力键,能提高桥梁的综合性能。为精确分析隔震桥梁的地震反应,建立了设置剪力键的减、隔震支座滞回模型,提出了剪力键的数值模拟方法。以某连续梁桥为背景,建立了全桥有限元分析模型,通过3种情况下桥梁地震反应分析结果的对比研究,验证了剪力键模拟方法的有效性。变化剪力键的水平承载力大小,分析了剪力键对减、隔震桥梁地震反应的影响。结果表明,剪力键对隔震桥梁的墩底弯矩有较大影响,隔震桥梁的地震反应分析时需考虑剪力键的影响。
Comprehensive performance of the isolated bridge can be improved by the shear key installed in isolation bearing.For accurate analysis of the seismic responses of isolated bridge,the hysteresis model of the isolation bearing with shear key was established,and the simulation of shear key was carried out.Based on a continuous girder bridge,the finite element analysis model of the full-bridge was established and the simulation of isolation bearing with shear key was validated by the comparison among the seismic responses of the isolated bridge under three cases.Effect of the shear key on the seismic responses of isolated bridge was assessed by varying the horizontal load bearing capacity of shear key.The results show that the horizontal load bearing capacity of shear key has a great impact on the bending moment of pier base of the isolated bridge,and the impact of shear key on the seismic responses of the isolated bridge should be considered in the seismic design.
Comprehensive performance of the isolated bridge can be improved by the shear key installed in isolation bearing.For accurate analysis of the seismic responses of isolated bridge,the hysteresis model of the isolation bearing with shear key was established,and the simulation of shear key was carried out.Based on a continuous girder bridge,the finite element analysis model of the full-bridge was established and the simulation of isolation bearing with shear key was validated by the comparison among the seismic responses of the isolated bridge under three cases.Effect of the shear key on the seismic responses of isolated bridge was assessed by varying the horizontal load bearing capacity of shear key.The results show that the horizontal load bearing capacity of shear key has a great impact on the bending moment of pier base of the isolated bridge,and the impact of shear key on the seismic responses of the isolated bridge should be considered in the seismic design.
引文
[1]Roussis P C,ASCE S M,Constantinou M C,et al.Assessment of performance of seismic isolation system of Bolu viaduct[J].Journal of Bridge En-gineering of ASCE,2003,8(4):182-190.
[2]夏修身,陈兴冲.桥梁震害分析及合理抗震体系研究[J].工程抗震与加固改造,2011,33(6):132-136.XIA Xiushen,CHEN Xingchong.Bridge damage analysis and reasonable seismic systems[J].Earthquake Resistant Engineering and Retrofitting,2011,33(6):132-136.(in Chinese)
[3]庄学真,沈朝勇,金建敏.桥梁高阻尼橡胶支座力学性能试验研究[J].地震工程与工程振动,2006,26(5):208-212.ZHUANG Xuezhen,SHEN Chaoyong,JIN Jianmin.Experimental study on mechanical property of high damping rubber bearing for bridge[J].Jour-nal of Earthquake Engineering and Engineering Vibration,2006,26(5):208-212.(in Chinese)
[4]Tobias D H,P E,S E,ASCE M,etal.Overview of earthquake resisting system design and retrofit strategy for bridges in Illinois[J].Practice Period-ical on Structural Design and Construction of ASCE,2008,13(3):147-158.
[5]彭天波,李建中,范立础.双曲面球型减隔震支座的竖向位移分析[J].同济大学学报:自然科学版,2007,35(9):1181-1185.PENG Tianbo,LI Jianzhong,FAN Lichu.Analysis of vertical displacement of double spherical aseismic bearing[J].Journal of Tongji University:Natural Science,2007,35(9):1181-1185.(in Chinese)
[6]夏修身,陈兴冲.铁路高墩桥梁基底转动隔震与墩顶减震的效果对比研究[J].铁道学报,2011,33(9):102-107.XIA Xiushen,CHEN Xingchong.Controlled rocking and pier top seismic isolation of railway bridge with tall piers[J].Journal of the China RailwaySociety,2011,33(9):102-107.(in Chinese)
[7]Zhongguo Guan,Jianzhong Li,Yan Xu.Performance test of energy dissipation bearing and its application in seismic control of a long-span bridge[J].Journal of Bridge Engineering of ASCE,2010,15(6):622-630.
[8]袁万城,曹新建,荣肇骏.拉索减震支座的开发与试验研究[J].哈尔滨工程大学学报,2010,31(12):1593-1600.YUAN Wancheng,CAO Xinjian,RONG Zhaojun.Development and experimental study on cable-sliding friction aseismic bearing[J].Journal ofHarbin Engineering University,2010,31(12):1593-1600.(in Chinese)
[9]夏修身,王常峰.钢筋混凝土桥墩基于性能的抗震设计研究[J].西安建筑科技大学学报:自然科学版.2010,42(2):294-299.XIA Xiushen,WANG Changfeng.Performance-based aseismic design for RC bridge piers[J].J.Xi'an Univ.of Arch.&Tech.Natural Science,2010,42(2):294-299.(in Chinese)
[10]Eurocode 8-Design of Structures for Earthquake Resistance-Part 2:Bridges[S].BS EN 1998-2:2005.
[2]夏修身,陈兴冲.桥梁震害分析及合理抗震体系研究[J].工程抗震与加固改造,2011,33(6):132-136.XIA Xiushen,CHEN Xingchong.Bridge damage analysis and reasonable seismic systems[J].Earthquake Resistant Engineering and Retrofitting,2011,33(6):132-136.(in Chinese)
[3]庄学真,沈朝勇,金建敏.桥梁高阻尼橡胶支座力学性能试验研究[J].地震工程与工程振动,2006,26(5):208-212.ZHUANG Xuezhen,SHEN Chaoyong,JIN Jianmin.Experimental study on mechanical property of high damping rubber bearing for bridge[J].Jour-nal of Earthquake Engineering and Engineering Vibration,2006,26(5):208-212.(in Chinese)
[4]Tobias D H,P E,S E,ASCE M,etal.Overview of earthquake resisting system design and retrofit strategy for bridges in Illinois[J].Practice Period-ical on Structural Design and Construction of ASCE,2008,13(3):147-158.
[5]彭天波,李建中,范立础.双曲面球型减隔震支座的竖向位移分析[J].同济大学学报:自然科学版,2007,35(9):1181-1185.PENG Tianbo,LI Jianzhong,FAN Lichu.Analysis of vertical displacement of double spherical aseismic bearing[J].Journal of Tongji University:Natural Science,2007,35(9):1181-1185.(in Chinese)
[6]夏修身,陈兴冲.铁路高墩桥梁基底转动隔震与墩顶减震的效果对比研究[J].铁道学报,2011,33(9):102-107.XIA Xiushen,CHEN Xingchong.Controlled rocking and pier top seismic isolation of railway bridge with tall piers[J].Journal of the China RailwaySociety,2011,33(9):102-107.(in Chinese)
[7]Zhongguo Guan,Jianzhong Li,Yan Xu.Performance test of energy dissipation bearing and its application in seismic control of a long-span bridge[J].Journal of Bridge Engineering of ASCE,2010,15(6):622-630.
[8]袁万城,曹新建,荣肇骏.拉索减震支座的开发与试验研究[J].哈尔滨工程大学学报,2010,31(12):1593-1600.YUAN Wancheng,CAO Xinjian,RONG Zhaojun.Development and experimental study on cable-sliding friction aseismic bearing[J].Journal ofHarbin Engineering University,2010,31(12):1593-1600.(in Chinese)
[9]夏修身,王常峰.钢筋混凝土桥墩基于性能的抗震设计研究[J].西安建筑科技大学学报:自然科学版.2010,42(2):294-299.XIA Xiushen,WANG Changfeng.Performance-based aseismic design for RC bridge piers[J].J.Xi'an Univ.of Arch.&Tech.Natural Science,2010,42(2):294-299.(in Chinese)
[10]Eurocode 8-Design of Structures for Earthquake Resistance-Part 2:Bridges[S].BS EN 1998-2:2005.
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