独塔刚构体系斜拉桥地震反应分析
|
摘要
基于非线性有限元理论,以某独塔双索面刚构体系斜拉桥为例建立了动力空间有限元模型,对该桥的动力特性进行了研究。在此基础上通过三角级数拟合规范反应谱的方法,合成了适用于结构分析的人造地震波,并以此和两条实际地震记录作为输入地震动,应用时程分析法对比分析了一致激励和行波激励下的结构地震反应。研究结果表明,在考虑纵向+竖向组合作用时,独塔双索面斜拉桥的内力和位移反应比纵向分量单独作用时更为显著;行波效应可以明显减小结构的位移反应,对结构抗震来讲是有利的。以上结论将为此类桥梁的设计和发展提供一定的理论依据。
Based on the nonlinear finite element thoery,a dynamic spatial finite element model of a single tower rigid-frame system cable-stayed bridge is built,and its dynamic characteristics is researched.The synthetic accelerograms compatible with the code response spectrum is generated by triangular series method in order to provide a reasonable seismic input for the time-history analysis method of the cable-stayed bridge system.At last the artificial wave and two realistic earthquake records are adopted in order to conduct a comparative analysis of the structural seismic response under the uniform excitation and travelling wave excitation.The results show that the displacement and internal force response of the bridge are more significant under the combined action of the both longitudinal and vertical excitations than that under the only longitudinal direction excitation;furthermore,the wave travelling effect can greatly reduces the structural displacement response,which is favorable for structural seismic resistance.These conclusions mentioned above will provide a theoretical basis for the design and development of such kind of bridges.
Based on the nonlinear finite element thoery,a dynamic spatial finite element model of a single tower rigid-frame system cable-stayed bridge is built,and its dynamic characteristics is researched.The synthetic accelerograms compatible with the code response spectrum is generated by triangular series method in order to provide a reasonable seismic input for the time-history analysis method of the cable-stayed bridge system.At last the artificial wave and two realistic earthquake records are adopted in order to conduct a comparative analysis of the structural seismic response under the uniform excitation and travelling wave excitation.The results show that the displacement and internal force response of the bridge are more significant under the combined action of the both longitudinal and vertical excitations than that under the only longitudinal direction excitation;furthermore,the wave travelling effect can greatly reduces the structural displacement response,which is favorable for structural seismic resistance.These conclusions mentioned above will provide a theoretical basis for the design and development of such kind of bridges.
引文
[1]顾安邦.桥梁工程[M].北京:人民交通出版社,2000.GU Anbang.Bridge engineering[M].Beijing:China Communication Press,2000.
[2]林家浩,张亚辉,赵岩.大跨结构抗震分析方法及近期进展[J].力学进展,2001,33(3):350-360.LIN Jiahao,ZHANG Yahui,ZHAO Yan.Seismic analysis methods of long-span structures and recent advances[J].Advances In Mechanics,2001,33(3):350-360.
[3]项海帆.斜张桥在行波作用下的地震反应分析[J].同济大学学报,1983,(2):1-9.XIANG Haifan.Earthquake response analysis of cable-stayed bridge under the action of travelling waves[J].Journal of Tongji University,1983,(2):1-9.
[4]陈幼平,周宏业.斜拉桥地震破坏的计算研究[J].地震工程与工程振动,1995,15(3):127-134.CHEN Youping,ZHOU Hongye.Seismic damage and collapes of cable-stayed bridges[J].Joumal of Earthquake Engineering and Engineering Vi-bration,1995,15(3):127-134.
[5]胡聿贤.地震工程学[M].北京:地震出版社,2006.HU Yuxian.Earthquake engineering[M].Beijing:Earthquake Press,2006.
[6]宋雅桐.人造地震波的研究[J].南京工业学院学报,1980,(2):80-89.SONG Yatong.Reserch on artificially generated earthquake records[J].Journal of Nanjing Institute of Technology,1980,(2):80-89.
[7]张翠红.大跨度斜拉桥多点激励效应研究[D].南京:东南大学,2004.ZHANG Cuihong.Study on seismic performance of long-span cable-stayed bridges under multi-support excitations[D].Nanjing:Southeast Uni-versity,2004.
[8]王新敏.ANSYS工程结构数值分析[M].北京:人民交通出版社,2007.WANG Xinmin.ANSYS numerical analysis of engineering structures[M].Beijing:China Communication Press,2007.
[9]虞庐松,朱晞.大跨度斜拉桥几何非线性地震反应[J].兰州铁道学院学报,1997,16(2):1-5.YU Lusong,ZHU Xi.Geometric nonlinear earthquake response of long span cable-stayed bridges[J].Journal of Lanzhou Railway Institute,1997,16(2):1-5.
[10]张子璐.大跨度混凝土斜拉桥地震反应特性研究[D].成都:西南交通大学,2003.ZHANG Zilu.Research on seismic response of long-span concret cable-stayed bridge[D].Chengdu:Southwest Jiaotong University,2003.
[11]JTG/TB02-01-2008公路桥梁抗震设计细则[S].JTG/TB02-01-2008 Guidelines for Seismic Design of Highway Bridges[S].
[2]林家浩,张亚辉,赵岩.大跨结构抗震分析方法及近期进展[J].力学进展,2001,33(3):350-360.LIN Jiahao,ZHANG Yahui,ZHAO Yan.Seismic analysis methods of long-span structures and recent advances[J].Advances In Mechanics,2001,33(3):350-360.
[3]项海帆.斜张桥在行波作用下的地震反应分析[J].同济大学学报,1983,(2):1-9.XIANG Haifan.Earthquake response analysis of cable-stayed bridge under the action of travelling waves[J].Journal of Tongji University,1983,(2):1-9.
[4]陈幼平,周宏业.斜拉桥地震破坏的计算研究[J].地震工程与工程振动,1995,15(3):127-134.CHEN Youping,ZHOU Hongye.Seismic damage and collapes of cable-stayed bridges[J].Joumal of Earthquake Engineering and Engineering Vi-bration,1995,15(3):127-134.
[5]胡聿贤.地震工程学[M].北京:地震出版社,2006.HU Yuxian.Earthquake engineering[M].Beijing:Earthquake Press,2006.
[6]宋雅桐.人造地震波的研究[J].南京工业学院学报,1980,(2):80-89.SONG Yatong.Reserch on artificially generated earthquake records[J].Journal of Nanjing Institute of Technology,1980,(2):80-89.
[7]张翠红.大跨度斜拉桥多点激励效应研究[D].南京:东南大学,2004.ZHANG Cuihong.Study on seismic performance of long-span cable-stayed bridges under multi-support excitations[D].Nanjing:Southeast Uni-versity,2004.
[8]王新敏.ANSYS工程结构数值分析[M].北京:人民交通出版社,2007.WANG Xinmin.ANSYS numerical analysis of engineering structures[M].Beijing:China Communication Press,2007.
[9]虞庐松,朱晞.大跨度斜拉桥几何非线性地震反应[J].兰州铁道学院学报,1997,16(2):1-5.YU Lusong,ZHU Xi.Geometric nonlinear earthquake response of long span cable-stayed bridges[J].Journal of Lanzhou Railway Institute,1997,16(2):1-5.
[10]张子璐.大跨度混凝土斜拉桥地震反应特性研究[D].成都:西南交通大学,2003.ZHANG Zilu.Research on seismic response of long-span concret cable-stayed bridge[D].Chengdu:Southwest Jiaotong University,2003.
[11]JTG/TB02-01-2008公路桥梁抗震设计细则[S].JTG/TB02-01-2008 Guidelines for Seismic Design of Highway Bridges[S].
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心