肋板式主梁剪力滞分析  

Analysis of Shear Lag of Ribbed Plate Main Beam

作　　者：刘国辉[1] 刘毓湘[2] 乐建平 

机构地区：[1]重庆交通学院,重庆市400074 [2]暨南大学土木系,广东广州510632 [3]中国四川国际合作股份有限公司,四川成都610016

出　　处：《公路交通技术》2005年第2期85-88,共4页Technology of Highway and Transport

摘　　要：首先根据最小势能原理用变分法推导了肋板式主梁的纵向位移函数的微分方程,推导中采用了3种不同的纵向位移函数,分别得出相应的微分方程。然后通过实例对3个微分方程的求解结果进行了对比分析,并把它们同有限元的结果进行对比,得出肋板式主梁翼板的合理的剪力滞分布形式。In this paper, the differential equation of vertical oriental displacement of the ribbed plate main beam is firstly deducted by the variational method based on the minimum potential energy theory. Three different vertical displacement functions are used in the deduction and the corresponding differential equations are got. Then, the solutions of the three differential equations are compared and analyzed based on a practical example, and they are also compared with the result of ANASYS software. Finally, a reasonable distribution mode of bending stress of the ribbed plate main beam is obtained.

关 键 词：肋板式主梁 剪力滞 微分方程 最小势能原理 位移函数 对比分析 分布形式 变分法 有限元 推导 翼板 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] O175.1[交通运输工程—道路与铁道工程]