铁道科学与工程学报2017，Vol.14Issue(10)：2154-2161,8.
考虑截面配筋的变截面悬臂梁剪力滞效应研究
Study on shear lag effect of varying section cantilever beam in consideration of section reinforcement
摘要
Abstract
In order to study the effect of section reinforcement on the shear lag effect of varying section cantilever box girder, the governing differential equations of the shear lag were derived based on the energy variation method and cubic parabola warping displacement function. Combined with the actual construction case, the shear lag effect of the cantilever beam with respect to different reinforcement ratios and different loads was calculated and analyzed by the finite difference solution. The results show that the section reinforcement of varying section cantilever box girder should have some influence on the shear lag effect, and with the increase of reinforcement ratio, the additional bending moment increases under different types of loads. But the change of the shear lag coefficient in different parts of the box girder is different. Under uniform load, the shear lag coefficient increases to up to 5.14% and reduced up to 24.42%; the maximum increase of shear lag coefficient under concentrated load is 2.77%, and the maximum decrease is 1.92%.关键词
剪力滞效应/悬臂梁/能量变分法/差分法Key words
shear lag effect/cantilever box girder/energy variation method/finite difference solution分类
交通工程引用本文复制引用
何志刚,蔺鹏臻..考虑截面配筋的变截面悬臂梁剪力滞效应研究[J].铁道科学与工程学报,2017,14(10):2154-2161,8.基金项目
国家自然科学基金资助项目(51168030,21508242,51368031) （51168030,21508242,51368031）
甘肃省基础研究创新群体资助项目(1506RJIA029) （1506RJIA029）
