随机车辆荷载下三塔悬索桥钢箱梁疲劳关键断面分析  

Fatigue analysis of steel box girder in key sections for three-tower suspension bridge under random vehicle load

作　　者：陈策[1,2] 吉伯海[1] 刘荣[1] 

机构地区：[1]河海大学土木与交通学院,南京210098 [2]江苏省长江公路大桥建设指挥部,江苏泰州225321

出　　处：《中国工程科学》2012年第5期75-79,共5页Strategic Study of CAE

基　　金：国家科技支撑计划资助项目(2009BAG15B02);交通行业联合科技攻关项目(2008-353-332-170);江苏省"333高层次人才培养工程"专项资助

摘　　要：泰州大桥为世界首座千米级三塔悬索桥,建立泰州大桥的三维全桥模型,通过简化的车辆荷载模型,将随机车流加载于大桥有限元模型上,计算泰州大桥主梁不同位置竖向位移和弯矩的振动响应值,分析车流作用下大桥主梁应力变化最大位置,从而确定主梁的疲劳分析的关键位置。Taizhou Bridge is the first kilometer level three-tower and two-span suspension bridge in the world. The three-dimensional full-bridge FEM （finite element method） model of the Taizhou Bridge and the random vehicle loading on the bridge finite element model by simplified vehicle load model are established. The vertical displacement and bending moment values are calculated to analyze the position of the maximum stress for the steel box girder under vehicle load. Then the critical position can be determined to carry out fatigue analysis for the steel box girder.

关 键 词：三塔悬索桥 正交异性板 疲劳应力分析 关键截面 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]