新型客站随机地震响应的控制策略
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摘要
高速铁路建造过程中出现的新型客站往往以房桥合一为特征,其综合了房屋建筑和桥梁结构二者的特点,抗震与减震设计必然不同于一般结构物。本文首先建立在新型客站中设置层间隔震和混合减震控制的基本模型,并基于随机地震输入和虚拟激励法推导高效计算表达式。在此理论基础上,研究层间隔震技术的减震效果和工作机理,指明层间隔震存在的缺陷。继而针对层间隔震的不足,在房桥合一客站中引入混合减震控制策略,其在层间隔震基础上通过设置连接阻尼器实现减小桥梁位移和避免梁体碰撞的目的,深入研究层间隔震与连接阻尼器的工作机理,提出混合减震策略的优化设计方法。研究表明:层间隔震与混合控制策略在房桥合一新型客站随机地震响应控制中是可行且有效的。
The new type station structure appearing during construction of high-speed railways is often characterized by station-bridge integrating and it combines the characteristics of both station and bridge,which means that it's seismic design differs from conventional structures.In this paper,the fundamental numerical models of storey isolation and hybrid control of the integrated station-bridge structure were established,and by introducing the random input of earthquake responses and the pseudo-excitation method the efficient calculation expression was derived.On the basis of the theoretical derivation,the damping effect and working mechanism of the storey isolation technique were studied and its defects were also pointed out.In view of the deficlencies of storey isolation,the hybrid control strategy was proposed which was to install viscous dampers between adjacent bridges to achieve the aim of reducing bridge displacement and avoiding beam impact.The working mechanism of the hybrid control strategy covering storey isolation and viscous dampers connection was deeply studied,and accordingly the optimized design method was putforward.The research shows that the storey isolation and hybrid control strategy are feasible and effective in control of stochastic seismic responses of integrated station-bridge structures.
The new type station structure appearing during construction of high-speed railways is often characterized by station-bridge integrating and it combines the characteristics of both station and bridge,which means that it's seismic design differs from conventional structures.In this paper,the fundamental numerical models of storey isolation and hybrid control of the integrated station-bridge structure were established,and by introducing the random input of earthquake responses and the pseudo-excitation method the efficient calculation expression was derived.On the basis of the theoretical derivation,the damping effect and working mechanism of the storey isolation technique were studied and its defects were also pointed out.In view of the deficlencies of storey isolation,the hybrid control strategy was proposed which was to install viscous dampers between adjacent bridges to achieve the aim of reducing bridge displacement and avoiding beam impact.The working mechanism of the hybrid control strategy covering storey isolation and viscous dampers connection was deeply studied,and accordingly the optimized design method was putforward.The research shows that the storey isolation and hybrid control strategy are feasible and effective in control of stochastic seismic responses of integrated station-bridge structures.
引文
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[13]国巍,余志武,国振.房桥合一结构层间隔震优化策略研究[J].地震工程与工程振动,2012,32(待定).GUO Wei,YU Zhi-wu,GUO Zhen.Research on Optimiza-tion Strategy of Storey Isolation in the Integrated Station-Bridge Structure[J].Earthquake Engineering and Engi-neering Vibration,2012,32(in press).
[14]林家浩,张亚辉.随机振动的虚拟激励法[M].北京:科学出版社,2004.
[15]朱宏平,杨紫健,唐家祥.利用连接装置控制两相邻结构的地震动响应[J].振动工程学报,2003,16(1):56-61.ZHU Hong-ping,YANG Zi-jian,TANG Jia-xing.Control of the Seismic Response of Two Adjacent Structures U-sing a Damped Link[J].Journal of Vibration Engineering,2003,16(1):56-61.
[2]Buckle I G,Eefi M,Mayas R L.Seismic Isolation:History,Application,and Performace-A World View[J].Earth-quake Spectra,1990,6(2):161-198.
[3]Jangid R S,Data T K.Seismic Behaviour of Base Isolmed Building a State-of-the-Art-Review[J].Journal of Struc-tures and Buildings,1995,110:186-203.
[4]日本免震构造协会.图解隔震结构入门[M].叶列平,译.北京:科学出版社,1998.
[5]李向真,欧海龙,林舒.层间隔震结构计算模型的简化分析[J].地震工程与工程振动,2002,22(1):121-125.LI Xiang-zhen,OU Hai-long,Lin Shu.Simplified Analysis on Calculation Model of Interlayer Seismic Isolation[J].Earthquake Engineering and Engineering Vibration,2002,22(1):121-125.
[6]祁皑,林云腾,郑国琛.层间隔震结构工作机理研究[J].地震工程与工程振动,2006,26(4):239-243.QI Kai,LIN Yun-teng,ZHENG Guo-chen.Research on Working Mechanism of Story Isolation Structure[J].Engi-neering and Engineering Vibration,2006,26(4):239-243.
[7]周福霖,张颖,谭平.层间隔震体系的理论研究[J].土木工程学报,2009,42(8):1-8.ZHOU Fu-lin,ZHANG Ying,TAN Ping.Theoretical Study on Story Isolation System[J].China Civil Engineering Jour-nal,2009,42(8):1-8.
[8]张颖,谭平,周福霖.层间隔震结构的能量平衡[J].应用力学学报,2010,27(1):204-208.ZHANG Ying,TAN Ping,ZHOU Fu-lin.Energy Balance of Story Isolation System[J].Chinese Journal of Applied Me-chanics,2010,27(1):204-208.
[9]赵新卫,栾锡富,彭凌云.层间隔震技术在地铁车辆段大平台上部土地开发上的应用研究[J].世界地震工程,2005,21(2):110-114.ZHAO Xin-wei,LUAN Xi-fu,PENG Ling-yun.Research on Storey Isolation Technology Applied to Exploitation ofthe Land Above the Platform of the Car Depot for Ba-wang-Fen Subway[J].World Earthquake Engineering,2005,21(2):110-114.
[10]蓝宗建.巨型框架多功能减振结构体系在地震和强风作用下的振运分析[D].南京:东南大学,2002.
[11]Feng D M,He W F,Yang Y Q,Liu W G.Numerical Re-sponse Analysis and Shaking Table Tests for Bridge and Building Complex Structural System(PartⅠ:Complex Structure Dynamic Test Research)[C]//14th WCEE,Oc-tober 12-17,2008.Beijing,China.
[12]Liu W G,Yang Q R,Hua L,He W F.Numerical Response Analysis and Shaking Table Tests for Bridge and Building Complex Structural System(PartⅡ:Parameter Optimum and Earthquake Response Analysis)[C]//14th WCEE,October 12-17,2008.Beijing,China.
[13]国巍,余志武,国振.房桥合一结构层间隔震优化策略研究[J].地震工程与工程振动,2012,32(待定).GUO Wei,YU Zhi-wu,GUO Zhen.Research on Optimiza-tion Strategy of Storey Isolation in the Integrated Station-Bridge Structure[J].Earthquake Engineering and Engi-neering Vibration,2012,32(in press).
[14]林家浩,张亚辉.随机振动的虚拟激励法[M].北京:科学出版社,2004.
[15]朱宏平,杨紫健,唐家祥.利用连接装置控制两相邻结构的地震动响应[J].振动工程学报,2003,16(1):56-61.ZHU Hong-ping,YANG Zi-jian,TANG Jia-xing.Control of the Seismic Response of Two Adjacent Structures U-sing a Damped Link[J].Journal of Vibration Engineering,2003,16(1):56-61.
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