摘要
变分原理通常适用于箱形截面梁剪力滞效应弹性分析.基于波形钢腹板组合箱梁在弯曲荷载作用下的"拟平截面假定",运用变分原理推导了波形钢腹板箱梁在集中荷载作用下翼板的正应力和剪力滞系数计算公式,并与有限元分析结果进行了对比.分析结果表明:变分法算得的翼板正应力和剪力滞系数和有限元法结果吻合,该法可为今后波形钢腹板组合梁桥的设计计算提供参考.
Variational principle is usually fit for elastic analysis of shear lag effect in box girder.In this paper,based on the quasi-plane assumption of composite box girders with corrugated steel webs,the shear lag coefficient formulas of the box girder under concentarted load are derived by means of variational principle.The results are compared with finite element analysis data.The shear lag coefficient obtained using the variational principle shows a good agreement with those from the finite element data.It can provide a reference for design and calculation analysis of composite box girder bridge with corrugated steel webs in the future.
出处
《兰州交通大学学报》
CAS
2010年第6期16-19,共4页
Journal of Lanzhou Jiaotong University
基金
国家自然科学基金(50968008)
甘肃省科技计划项目(1007RJYA008)
甘肃省道路桥梁与地下工程重点实验室开放基金项目(Kfjj-10-01)
兰州交通大学大学生科技创新项目(DXS2010-024)
关键词
组合箱梁
变分原理
剪力滞效应
波形钢腹板
拟平截面假定
composite box girder
variational principle
shear lag effect
corrugated steel web
dummy horizontal section assumption
