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大跨度斜拉桥混凝土索塔钢锚箱空间有限元分析研究
引用本文:白光亮,蒲黔辉,夏招广.大跨度斜拉桥混凝土索塔钢锚箱空间有限元分析研究[J].公路交通科技,2008,25(8).
作者姓名:白光亮  蒲黔辉  夏招广
作者单位:西南交通大学,土木工程学院,四川,成都,610031
摘    要:结合国内某连岛工程大跨度斜拉桥,介绍了其索塔钢锚箱的构造特点,同时采用空间有限元方法对其混凝土索塔钢锚箱节段模型进行仿真计算分析以及结构受力分析,指出了索塔锚固区的应力分布特点。结果表明:钢锚箱虽然板件较多,但整体性能好,索力传递流畅,该结构部分区域存在一定程度的应力集中,在1.7倍设计荷载作用下,结构的承载力满足设计要求,并具有一定的安全储备。最后给出仿真计算的主要成果,研究结果对于斜拉桥索塔锚固区设计具有一定的参考作用。

关 键 词:桥梁工程  钢锚箱  有限元分析  斜拉桥  钢-混凝土组合索塔  应力集中

Analysis of 3D Finite Element Models for Concrete Pylon Steel-anchor-box in Long-span Cable-stayed Bridge
BAI Guang-liang,PU Qian-hui,XIA Zhao-guang.Analysis of 3D Finite Element Models for Concrete Pylon Steel-anchor-box in Long-span Cable-stayed Bridge[J].Journal of Highway and Transportation Research and Development,2008,25(8).
Authors:BAI Guang-liang  PU Qian-hui  XIA Zhao-guang
Abstract:The structure and stress distribution of the anchorage zone on pylon of long-span cable-stayed bridge are extremely complex.Based on the model of concrete pylon steel-anchor-box in cable-stayed bridge,the configuration character of the anchorage zone was introduced.In combination with finite element method,the stress distribution features analysis and the simulation analysis of the zone were carried out.The results show that(1)although there are a lot of slabs,the global behavior of steel-anchor-box is well and the cable force transfers fluently;(2)the areas of stress concentration are fairly localized;(3)the structural performance satisfies the design requirement under 1.7 times the design load.The results are of important guidance to the design of anchorage zone on pylon of long-span cable-stayed bridge.
Keywords:bridge engineering  steel-anchor-box  finite element analysis  cable-stayed bridge  steel-concrete composite pylon  stress concentration
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