强震作用下连续梁桥的减隔震控制研究
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摘要
近年来,在频繁发生的强震中,大量的连续梁桥出现了构件破坏,甚至发生了整体倒塌的现象,因此,需要采用有效的减隔震措施以减少这类震害。本文提出了一种多功能减隔震支座,介绍了其构造、原理和力学性能,然后以一座连续箱梁桥为工程背景,基于动力显式有限元模型,分别进行了有无该支座下强震作用时该桥的倒塌仿真分析,得到其破坏模式,再对比分析了其减隔震效果。结果表明,该多功能减隔震支座具有较好的减隔震效果,在强震作用下,该连续梁桥的破坏模式得到了改善,得到的结论可为连续梁桥的减隔震技术及其应用提供参考。
Under the frequency strong earthquakes,the failure phenomenon of the component in many continuous beam bridges have appeared even the whole structure collapse in recent years.Therefore,it is necessary to adopt the effective seismic control measures to decrease this seismic damage.In this paper,a new multifunction isolation bearing is proposed,its configuration design,working principles and the mechanical performance are introduced in detail.A continuous box beam bridge is taken as an example,the collapse simulation analysis of the bridge under strong earthquakes with the multifunction bearing is conducted to discuss the failure modes and the seismic control effect of the bridge using the bearing based on the dynamic explicit finite element model.The results show that the multifunction isolation bearing has better seismic control effect,and the failure model of the continuous beam bridge under strong earthquake is improved.It provides some references for the seismic control technology and their application of continuous beam bridges.
Under the frequency strong earthquakes,the failure phenomenon of the component in many continuous beam bridges have appeared even the whole structure collapse in recent years.Therefore,it is necessary to adopt the effective seismic control measures to decrease this seismic damage.In this paper,a new multifunction isolation bearing is proposed,its configuration design,working principles and the mechanical performance are introduced in detail.A continuous box beam bridge is taken as an example,the collapse simulation analysis of the bridge under strong earthquakes with the multifunction bearing is conducted to discuss the failure modes and the seismic control effect of the bridge using the bearing based on the dynamic explicit finite element model.The results show that the multifunction isolation bearing has better seismic control effect,and the failure model of the continuous beam bridge under strong earthquake is improved.It provides some references for the seismic control technology and their application of continuous beam bridges.
引文
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[8]尚晓江,苏建宇,王化锋,等.ANSYS/LS-DYNA动力分析方法与工程实例[M].北京:中国水利水电出版社,2006Shang Xiao-jiang,Su Jian-yu,Wang Hua-feng,et al.ANSYS/LS-DYNA Dynamic Analysis Method and Engineering Examples[M].Beijing:China Water Power Press,2006(in Chinese)
[9]陈永祁,王静,刘林.国外减隔震桥梁的失效分析[J].工程抗震与加固改造,2008,30(5):41～47Chen Yong-qi,Wang Jing,Liu Lin.Failure Analysis of Overseas Seismic Isolated Bridge[J].Earthquake Resistant Engineering and Retrofitting,2008,30(5):41～47(in Chinese)
[2]李鸿晶,陆鸣,温增平,罗韧.汶川地震桥梁震害的特征[J].南京工业大学学报,2009,31(1):24～29Li Hong-jin,Lu Min,Wen Zeng-pin,Luo Ren.Characteristics of Bridge Damages in Wenchuan Earthquake[J].Journal of Nanjing University of Technology(Natural Science Edition).2009,31(1):24～29(in Chinese)
[3]周艳,张雷明,刘西拉.美国Cypress高架桥地震倒塌的仿真分析[J].岩体力学与工程学报,2005,24(17):3035～3044Zhou Yan,Zhang Lei-ming,Liu Xi-la.Collapse Simulation Analysis of Cypress Viaduct During Earthquake[J].Journal of Rock Mechanics and Engineering,2005,24(17):3035～3044(in Chinese)
[4]孙利民,游新鹏,魏朝柱.跨越山谷高墩混凝土桥地震倒塌分析[J].工程抗震与加固改造,2005,27(12):108～112Sun Li-min,You Xin-peng,Wei Chao-zhu.Analysis of the Collapse of High-pier Bridges Crossing Deep Valleys of Mountain Area under Earthquake[J].Earthquake Resistant Engineering and Retrofitting,2005,27(12):108～112(in Chinese)
[5]闫冬,任胜健,何勇.桥梁倒塌模式识别方法:理论分析[J]公路交通科技,2011,28(8):100～104Yan Dong,Ren Sheng-jian,He Yong.Identification Method of Bridge Collapse Pattern:Theoretical Analysis[J].Journal of Highway and Transportation Research and Development,2011,28(8):100～104(in Chines)
[6]郭磊,李建中,范立础.大跨度连续梁桥减隔震设计研究[J].土木工程学报,2006,39(3):81～85Guo Lei,Li Jian-zhong,Fan Li-chu.Research on Seismic Isolation Design for Long-span Continuous Bridges[J].China Civil Engineering Journal.2006,39(3):81～85(in Chinese)
[7]吴陶晶,李建中,管仲国.减隔震装置作用机理及其在大跨度连续梁桥中的应用[J].结构工程师,2009,25(4):102～107Wu Tao-jing,Li Jian-zhong,Guan Zhong-guo.Mechanism of Seismic Isolation Devices and Applications in a Long-Span Continuous Bridge[J].Structural Engineers,2009,25(4):102～107(in Chinese)
[8]尚晓江,苏建宇,王化锋,等.ANSYS/LS-DYNA动力分析方法与工程实例[M].北京:中国水利水电出版社,2006Shang Xiao-jiang,Su Jian-yu,Wang Hua-feng,et al.ANSYS/LS-DYNA Dynamic Analysis Method and Engineering Examples[M].Beijing:China Water Power Press,2006(in Chinese)
[9]陈永祁,王静,刘林.国外减隔震桥梁的失效分析[J].工程抗震与加固改造,2008,30(5):41～47Chen Yong-qi,Wang Jing,Liu Lin.Failure Analysis of Overseas Seismic Isolated Bridge[J].Earthquake Resistant Engineering and Retrofitting,2008,30(5):41～47(in Chinese)
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