大跨度钢桁架拱桥的空间地震响应分析
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摘要
基于多自由度空间体系地震响应分析的基本理论,得到大跨度桥梁的空间地震响应分析方法,并运用线弹性有限元理论将其程序化,分析过程包括桥梁有限元建模、地震动的选择、动力时程分析等。以重庆朝天门长江大桥—三跨中承式连续钢桁架拱桥为例,分别研究大跨度钢桁架拱桥在一致激励和行波效应作用下的地震响应。研究结果表明:对于此类型桥梁的拱肋,在一致激励下,纵向位移最大峰值出现在1/4中跨附近,中跨下拱肋左拱脚处的单元内力峰值最大;竖向地震动和行波效应对结构位移和内力的影响较大。
Based on the analysis theory of seismic response for multi-freedom space system,a seismic response analysis procedure of long-span bridges was obtained and programmed with linear elastic finite element method.The procedures included finite element modeling,selection of ground motions and dynamic time-history analysis of the bridge and so on.A 3-span semi-supported continuous steel truss arch bridge,namely the Chongqing Chaotianmen Yangtze River Bridge,was taken as an example,the seismic characteristics of the bridge was investigated during uniform excitation and traveling wave excitation,respectively.The analysis results show that the maximal peak value of longitudinal displacement appears around the 1/4 of the center span for the arch rib of this bridge during uniform excitation,and the peak value of element internal force,which is around the left foot arch of the underlying arch rib,is maximal.The vertical earthquake ground motion and the traveling wave effects may affect the displacements and internal forces of the bridge greatly.
Based on the analysis theory of seismic response for multi-freedom space system,a seismic response analysis procedure of long-span bridges was obtained and programmed with linear elastic finite element method.The procedures included finite element modeling,selection of ground motions and dynamic time-history analysis of the bridge and so on.A 3-span semi-supported continuous steel truss arch bridge,namely the Chongqing Chaotianmen Yangtze River Bridge,was taken as an example,the seismic characteristics of the bridge was investigated during uniform excitation and traveling wave excitation,respectively.The analysis results show that the maximal peak value of longitudinal displacement appears around the 1/4 of the center span for the arch rib of this bridge during uniform excitation,and the peak value of element internal force,which is around the left foot arch of the underlying arch rib,is maximal.The vertical earthquake ground motion and the traveling wave effects may affect the displacements and internal forces of the bridge greatly.
引文
[1]刘爱荣,张俊平,禹奇才,等.多点激励下大跨度连续刚架拱组合桥的空间地震响应分析[J].暨南大学学报:自然科学版,2007,28(3):246?250.LIU Ai-rong,ZHANG Jun-ping,YU Qi-cai,et al.Spatial seismic 1596中南大学学报(自然科学版)第41卷response analysis of long-span combined bridge of continuous rigid-frame and arch structure under multiple support excitation[J].Journal of Jinan University:Science and Technology,2007,28(3):246?250.
[2]刘爱荣,张俊平,禹奇才,等.桩?土?结构相互作用对大跨度连续刚架钢桁拱桥地震影响研究[J].桥梁建设,2007(1):25?27.LIU Ai-rong,ZHANG Jun-ping,YU Qi-cai,et al.Study of influences of pile-soil-structure interaction on seismic response of long span continuous rigid-frame and steel truss arch bridge[J].Bridge Construction,2007(1):25?27.
[3]LIU Ai-rong,YU Qi-cai,ZHANG Jun-ping.Seismic response of long span continuous rigid-frame arch bridge[J].Journal of Shenzhen University:Science and Engineering,2007,24(3):228?232.
[4]赵灿晖,周志祥.大跨度上承式钢桁拱桥的地震响应分析[J].铁道科学与工程学报,2006,3(5):6?11.ZHAO Can-hui,ZHOU Zhi-xiang.Seismic response analysis of long-span steel braced deck-type arch bridge[J].Journal of Railway Science and Engineering,2006,3(5):6?11.
[5]赵灿晖,李乔,夏嵩.连续刚架拱桥地震响应分析[J].桥梁建设,2007(1):21?24.ZHAO Can-hui,LI Qiao,XIA Song.Seismic response analysis of continuous rigid-frame arch bridge[J].Bridge Construction,2007(1):21?24.
[6]骆文海.强震加速度波形积分时的基线修正[J].传感器技术,1991(3):23?26.LUO Wen-hai.Correction of datum line when integrating strong vibration acceleration wave form[J].Journal of Transducer Technology,1991(3):23?26.
[7]谢旭.桥梁结构地震响应分析与抗震设计[M].北京:人民交通出版社,2006:57?58.XIE Xu.Seismic response and earthquake resistant design of bridge[M].Beijing:China Communications Press,2006:57?58.
[8]Dibaj M,Penzien J.Response of earth dams to traveling seismic waves[J].American Society of Civil Engineering,1969(SM2):541?560.
[9]范立础.桥梁抗震[M].上海:同济大学出版社,1997:32?33.FAN Li-chu.Bridge aseismic[M].Shanghai:Tongji University Press,1997:32?33.
[10]李国豪.桥梁结构稳定与振动[M].北京:中国铁道出版社,1992:22?24.LI Guo-hao.Stability and vibration of bridge structures[M].Beijing:China Railway Press,1992:22?24.
[11]杨孟刚,胡建华,陈政清.独塔自锚式悬索桥地震响应分析[J].中南大学学报:自然科学版,2005,36(1):133?137.YANG Meng-gang,HU Jian-hua,CHEN Zheng-qing.Seismic response analysis of self-anchored suspension bridge with single-tower[J].Journal of Central South University:Science and Technology,2005,36(1):133?137.
[12]宗周红,赖苍林,林建筑.基于环境振动的既有预应力连续刚构桥地震响应分析[J].铁道学报,2005,27(5):83?91.ZONG Zhou-hong,LAI Cang-lin,LIN Jian-zhu.Ambient vibration-based seismic response analysis of an existing prestressed continuous rigid-framed bridge[J].Journal of the China Railway Society,2005,27(5):83?91.
[13]XU Kai-yan,WEI De-min,LIU Can.Earthquake response analysis of cable-stayed bridges under uniform and multiple-support excitations[J].Science Technology and Engineering,2007,7(10):2288?2291.
[14]杨孟刚.磁流变阻尼器在大跨度桥梁上的减震理论研究[D].长沙:中南大学土木建筑学院,2004:46?47.YANG Meng-gang.Study on theory of using magnetorheological damper to control seismic response for long-span bridge[D].Changsha:Central South University.School of Civil and Architectural Engineering,2004:46?47.
[15]巴斯K J,威尔逊E L.有限元分析中的数值方法[M].林公豫,罗恩,译.北京:科学出版社,1985:319?320.Bathe K J,Wilson E L.Numerical methods in finite element analysis[M].LIN Gong-yu,LUO En,translation.Beijing:Science Press,1985:319?320.
[2]刘爱荣,张俊平,禹奇才,等.桩?土?结构相互作用对大跨度连续刚架钢桁拱桥地震影响研究[J].桥梁建设,2007(1):25?27.LIU Ai-rong,ZHANG Jun-ping,YU Qi-cai,et al.Study of influences of pile-soil-structure interaction on seismic response of long span continuous rigid-frame and steel truss arch bridge[J].Bridge Construction,2007(1):25?27.
[3]LIU Ai-rong,YU Qi-cai,ZHANG Jun-ping.Seismic response of long span continuous rigid-frame arch bridge[J].Journal of Shenzhen University:Science and Engineering,2007,24(3):228?232.
[4]赵灿晖,周志祥.大跨度上承式钢桁拱桥的地震响应分析[J].铁道科学与工程学报,2006,3(5):6?11.ZHAO Can-hui,ZHOU Zhi-xiang.Seismic response analysis of long-span steel braced deck-type arch bridge[J].Journal of Railway Science and Engineering,2006,3(5):6?11.
[5]赵灿晖,李乔,夏嵩.连续刚架拱桥地震响应分析[J].桥梁建设,2007(1):21?24.ZHAO Can-hui,LI Qiao,XIA Song.Seismic response analysis of continuous rigid-frame arch bridge[J].Bridge Construction,2007(1):21?24.
[6]骆文海.强震加速度波形积分时的基线修正[J].传感器技术,1991(3):23?26.LUO Wen-hai.Correction of datum line when integrating strong vibration acceleration wave form[J].Journal of Transducer Technology,1991(3):23?26.
[7]谢旭.桥梁结构地震响应分析与抗震设计[M].北京:人民交通出版社,2006:57?58.XIE Xu.Seismic response and earthquake resistant design of bridge[M].Beijing:China Communications Press,2006:57?58.
[8]Dibaj M,Penzien J.Response of earth dams to traveling seismic waves[J].American Society of Civil Engineering,1969(SM2):541?560.
[9]范立础.桥梁抗震[M].上海:同济大学出版社,1997:32?33.FAN Li-chu.Bridge aseismic[M].Shanghai:Tongji University Press,1997:32?33.
[10]李国豪.桥梁结构稳定与振动[M].北京:中国铁道出版社,1992:22?24.LI Guo-hao.Stability and vibration of bridge structures[M].Beijing:China Railway Press,1992:22?24.
[11]杨孟刚,胡建华,陈政清.独塔自锚式悬索桥地震响应分析[J].中南大学学报:自然科学版,2005,36(1):133?137.YANG Meng-gang,HU Jian-hua,CHEN Zheng-qing.Seismic response analysis of self-anchored suspension bridge with single-tower[J].Journal of Central South University:Science and Technology,2005,36(1):133?137.
[12]宗周红,赖苍林,林建筑.基于环境振动的既有预应力连续刚构桥地震响应分析[J].铁道学报,2005,27(5):83?91.ZONG Zhou-hong,LAI Cang-lin,LIN Jian-zhu.Ambient vibration-based seismic response analysis of an existing prestressed continuous rigid-framed bridge[J].Journal of the China Railway Society,2005,27(5):83?91.
[13]XU Kai-yan,WEI De-min,LIU Can.Earthquake response analysis of cable-stayed bridges under uniform and multiple-support excitations[J].Science Technology and Engineering,2007,7(10):2288?2291.
[14]杨孟刚.磁流变阻尼器在大跨度桥梁上的减震理论研究[D].长沙:中南大学土木建筑学院,2004:46?47.YANG Meng-gang.Study on theory of using magnetorheological damper to control seismic response for long-span bridge[D].Changsha:Central South University.School of Civil and Architectural Engineering,2004:46?47.
[15]巴斯K J,威尔逊E L.有限元分析中的数值方法[M].林公豫,罗恩,译.北京:科学出版社,1985:319?320.Bathe K J,Wilson E L.Numerical methods in finite element analysis[M].LIN Gong-yu,LUO En,translation.Beijing:Science Press,1985:319?320.
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