铁道科学与工程学报2017，Vol.14Issue(7)：1505-1511,7.
基于翘曲位移函数的框筒结构剪力滞后效应研究
Research on shear lag effect of frame tube structure based on warping displacement function
摘要
Abstract
This study used equivalent continuous for the frame tube structure and assumed the same maximum longitudinal displacement difference function for the flange and the web. According to the characteristic of shear lag effect, the warping displacement function of flange was assumed and webs were assumed to be quadratic and cubic parabola respectively. By using the energy variational principle, the governing differential equations and boundary condition equations were deduced and then solved under horizontal concentrated force and horizontal uniform load. In order to study the influence of Timoshenko shear deformation and web warping function on the shear lag, the corresponding differential equations were deduced and solved. Through the example analysis, the following conclusions were drawn: the calculation method can correctly analyze the shear lag effect of the frame tube and has few independent function for convenient solution; Timoshenko shear deformation cannot be considered when analyzing the shear lag effect of frame tube; adopting linear warping function in the web cannot be used to reflect the hysteresis phenomenon of the web, although it can reflect the shear lag of the flange; and the lag degree of calculation is relatively small.关键词
框筒结构/翘曲函数/变分原理/Timoshenko剪切变形/剪力滞后Key words
Tube structure/warping function/variational principle/Timoshenko shear deformation/shear lag分类
建筑与水利引用本文复制引用
李耀庄,翟治鹏,项正良..基于翘曲位移函数的框筒结构剪力滞后效应研究[J].铁道科学与工程学报,2017,14(7):1505-1511,7.基金项目
中央高校基本科研业务费专项资金资助项目(2016zzts419) （2016zzts419）
