土木工程与管理学报2017，Vol.34Issue(5)：22-26,45,6.
悬臂曲线箱梁负剪力滞效应
Negative Shear Lag Effect of Cantilever Curved Box Girder
摘要
Abstract
In order to investigate the negative shear lag effect of cantilever curved box girder,the shear lag calculating formula of cantilever box girder is deduced based on energy principle in this paper. Then comparing the theoretical result with the finite element of ANSYS,a good agreement is achiered between them. Based on it,the influences of web space,cantilever slab width,curvature radius,box girder height and thickness on negative shear lag effect are analyzed by using finite element program. The results indicate that:(1)Under uniform load,there are prominent positive and negative shear lag effects along full-span longitudinal direction. The negative shear lag is most prominent at l/ 6 cross section,and positive shear lag effect is most prominent at the root of cantilever beam. (2)Compared with straight beam,the stress distribution of curved beam which considered the influence of curvature is more non-uniform. (3)There are inert areas of shear lag effect at the junction between the inside web and upper flange,while for outside web,there isn't inert area,but it has the same critical points of positive and negative shear lag. (4)Web space and cantilever slab width have a great influence on negative shear lag effect,while curvature radius,box girder height and thickness have some influence on negative shear lag effect.关键词
曲线箱梁/负剪力滞/参数分析/有限元Key words
curved box girder/negative shear lag effect/parametric analysis/finite element method分类
交通工程引用本文复制引用
卢海林,蔡恒,杨宏印,汤正..悬臂曲线箱梁负剪力滞效应[J].土木工程与管理学报,2017,34(5):22-26,45,6.基金项目
国家自然科学基金(51378404) （51378404）
交通运输部建设科技项目(2014318363230) （2014318363230）
武汉工程大学创新基金(CX2016036) （CX2016036）
