特大跨桥梁地震弹塑性分析
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摘要
近年来,我国地震灾害频发,结构的地震灾变机理研究得到了广泛的重视。桥梁结构作为生命线工程之一,其抗震性能研究尤为重要。同时,经济与社会的发展对于特大跨桥梁的建设提出了需求。随着桥梁跨度的增大,其地震动力学问题也愈加复杂,且无规范可循。基于有限元软件的地震弹塑性分析成为了研究特大跨桥梁地震响应的重要手段之一。本文以琼州海峡大桥悬索桥及斜拉桥设计方案为例,研究了特大跨桥梁的基本动力特性及地震响应,为进一步开展千米级以上的特大跨桥梁地震灾变分析提供参考。
The structural seismic performance has received a lot focus in recent years due to the frequent occurrence of earthquakes in China. As one of the lifeline engineering,the study of the seismic performance and collapse mechanism of bridges appears to be particularly essential. At the same time,the development of economy and society raise the demand of large scale bridges,of which the dynamic analysis become more complicate. At present,elasto-plastic analyses based on the finite element program has become one of the most popular methods in the study of seismic performance of super long span bridges. The proposed design of Qiongzhou Strait Bridge is established in the finite element program and the basic dynamic characteristics as well as the performance under earthquake are discussed.This research could provide a reference for the further study of seismic performance of super long span bridges.
The structural seismic performance has received a lot focus in recent years due to the frequent occurrence of earthquakes in China. As one of the lifeline engineering,the study of the seismic performance and collapse mechanism of bridges appears to be particularly essential. At the same time,the development of economy and society raise the demand of large scale bridges,of which the dynamic analysis become more complicate. At present,elasto-plastic analyses based on the finite element program has become one of the most popular methods in the study of seismic performance of super long span bridges. The proposed design of Qiongzhou Strait Bridge is established in the finite element program and the basic dynamic characteristics as well as the performance under earthquake are discussed.This research could provide a reference for the further study of seismic performance of super long span bridges.
引文
[1]JTG/TB 02-01-2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.JTG/TB 02-01-2008 Guidelines for Seismic Design of Highway Bridges[M].Beijing:China Communications Press.2008.(in Chinese)
[2]Lu X,Lu XZ,Zhang WK,Ye LP.Collapse simulation of a super high-rise building subjected to extremely strong earthquakes[J].Science China Technological Sciences,2011,54(10):2549-2560.
[3]邓育林,雷凡,何雄君.纵向地震作用下大跨三塔悬索桥伸缩缝处双边碰撞效应研究[J].振动与冲击,2013,32(12):126-130.DENG Yulin,LEI Fan,HE Xiongjun.Effect of double-side pounding at expansion joints on seismic response of a long-span triple-pylon suspension bridge.Journal of vibration and shock,2013,32(12):126-130.(in Chinese)
[4]Oliveira Pedro JJ,Reis A J.Nonlinear analysis of composite steel-concrete cable-stayed bridges[J].Engineering Structures,2010,32(9):2702-2716.
[5]王滔.大跨斜拉桥地震反应分析[D].中国地震局工程力学研究所,2008.WANG Tao.Study of three dimensional seismic response of long span cable-stayed bridge[D].Institute of Engineering Mechanics,China Earthquake Administration,2007.(in Chinese)
[6]Wibowo H,Reshotkina S S,Lau D T.Modelling progressive collapse of RC bridges during earthquakes[C]//CSCE Annual General Conference2009.2009:27-30.
[7]卢啸,陆新征,叶列平,等.钢筋混凝土拱桥构件重要性评价及超载导致倒塌破坏模拟[J].计算机辅助工程,2010,19(3):26-30.LU Xiao,LU Xinzheng,YE Lieping,et al.Component importance evaluation and overload-induced collapse simulation for reinforced concrete arch bridge[J].Computer Aided Engineering,2010,19(3):26-30.(in Chinese)
[2]Lu X,Lu XZ,Zhang WK,Ye LP.Collapse simulation of a super high-rise building subjected to extremely strong earthquakes[J].Science China Technological Sciences,2011,54(10):2549-2560.
[3]邓育林,雷凡,何雄君.纵向地震作用下大跨三塔悬索桥伸缩缝处双边碰撞效应研究[J].振动与冲击,2013,32(12):126-130.DENG Yulin,LEI Fan,HE Xiongjun.Effect of double-side pounding at expansion joints on seismic response of a long-span triple-pylon suspension bridge.Journal of vibration and shock,2013,32(12):126-130.(in Chinese)
[4]Oliveira Pedro JJ,Reis A J.Nonlinear analysis of composite steel-concrete cable-stayed bridges[J].Engineering Structures,2010,32(9):2702-2716.
[5]王滔.大跨斜拉桥地震反应分析[D].中国地震局工程力学研究所,2008.WANG Tao.Study of three dimensional seismic response of long span cable-stayed bridge[D].Institute of Engineering Mechanics,China Earthquake Administration,2007.(in Chinese)
[6]Wibowo H,Reshotkina S S,Lau D T.Modelling progressive collapse of RC bridges during earthquakes[C]//CSCE Annual General Conference2009.2009:27-30.
[7]卢啸,陆新征,叶列平,等.钢筋混凝土拱桥构件重要性评价及超载导致倒塌破坏模拟[J].计算机辅助工程,2010,19(3):26-30.LU Xiao,LU Xinzheng,YE Lieping,et al.Component importance evaluation and overload-induced collapse simulation for reinforced concrete arch bridge[J].Computer Aided Engineering,2010,19(3):26-30.(in Chinese)
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