考虑横肋板作用的正交异性钢桥面板有限元分析方法  

Simplified Finite Element Method of Orthotropic Steel Bridge Decks

作　　者：骆佐龙 宋一凡[1] 贺拴海[1] 

机构地区：[1]长安大学公路学院,西安710064

出　　处：《武汉理工大学学报》2013年第11期103-107,共5页Journal of Wuhan University of Technology

基　　金：交通运输部西部交通建设科技项目(2011 812 318 970);中央高校基本科研业务专项资金项目(CHD2012JC001)

摘　　要：针对大跨度钢桥中正交异性钢桥面板通常设置横肋板加劲,提出一种考虑横肋板作用的正交异性钢桥面板空间分析的简化有限元算法。其中顶板采用平面板单元分析,梯形加劲肋与横肋板采用板梁子单元模拟。基本未知量采用顶板单元的节点位移分量,梯形加劲肋与横肋板的位移模式由肋板的变形协调关系得到,最后通过变分原理得到组合单元的刚度矩阵。通过与有限元程序计算结果进行对比,得出此方法的计算精度较高,计算效率亦比较高,值得在实际工程计算中推广。According to the transverse stiffener set across the orthotropic steel bridge deck,a simplified finite element method considering the function of the transverse stiffener was proposed. The plane element was adopted for the roof plate and the beam element was adopted for the longitudinal and transverse stiffeners. The node displacement of roof plate was as the basic unknown quantities and the displacement modes of the longitudinal and transverse stiffeners were obtained by the deformation coordination. Finally the stiffness matrix of the composition element was got by variation principle. Com- pared with finite element calculation, the conclusion is that the accuracy and efficiency are both higher and the method mentioned in this article is worth popularizing in the practical engineering calculation.

关 键 词：正交异性钢桥面板 纵向加劲肋 横肋板 组合单元 有限元 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]