铁道科学与工程学报2018，Vol.15Issue(1)：103-109,7.
基于剪切变形规律的剪力滞分析的有限梁段法
Finite segment method of shear lag analysis of box girders based on flange-slab shear deformation law
摘要
Abstract
Through the finite segment method based on the warping displacement function is caused by shear deformation analyzes the shear lag effect of the thin-wall box girder. The warping displacement function is defined from the shear lag effect caused by the shear deformation of the wing plate. The principle is more explicit and high degree of precision. The governing differential equation for shear lag of box girders and the corresponding boundary calculus method based on the variation principle of the minimum potential energy. Based on the method to define the warping displacement function of shear lag and the governing differential equations by variational principle, derived the shear lag coefficient matrix and generalized load vector, using finite element method to analyze shear lag effect. The shear log effect of the simply supported box girder indude experimental model and railway under uniform load or mid-span load and the cantilever box girder under uniformly distributed load are analyzed. The results obtained from the finite segment procedure accurately agree with those from variational analysis method. which validates the effectiveness of the present analytical method.关键词
箱梁/剪力滞/剪切变形/有限梁段Key words
box girder/shear lag/shear deformation/finite segment method分类
交通工程引用本文复制引用
周朋,蔺鹏臻,何志刚..基于剪切变形规律的剪力滞分析的有限梁段法[J].铁道科学与工程学报,2018,15(1):103-109,7.基金项目
国家自然科学基金重大资助项目(51368031) （51368031）
中国铁路总公司科技研究开发计划课题(2017G010) （2017G010）
兰州交通大学优秀平台资助项目(201601) （201601）
