第39秦第3期 2017年6月
土水建筑与环境工程
Journal of Civil,Architectural &. Environmental Engineering
doi:10.11835/j. issn. 16744764. 2017. 03. 003
Vol. 39 No. 3 Jun. 2017
可
考虑滑移和剪切变形的单箱双室组合箱梁
剪力滞效应
周世军"，江瑶1，吴云丹1，宋刚1，陈晨2
(1.重庆大学土木工程学院；山地城镇建设与新技术教育部重点实验室，重庆400045
2.中铁二十一局集团第五工程有限公司，重庆400025）
摘要：为准确分析单箱双室组合箱梁的剪力滞效应，考虑钢一混凝土的界面滑移效应和钢腹板的剪切变形，针对项底板和翼板定义不同的剪力滞翘曲位移西数，基于能量变分法推导出单箱双室组合箱架剪滞效应的控制微分方程及其闭合解。以单箱双室组合箱染算例为基础，利用该方法分析其剪力滞效应的规律，结果表明：在同时考虑清移和剪切变形时，组合箱梁的挑度比初等梁理论解大，且其挠度随界面清移刚度的增大而减小；组合箱梁在均布荷载作用下，清移量与荷载值近似成
正比关系；在相同条件下，钢箱梁底板的剪力滞效应较混凝土顶板显著。关键词：组合箱梁；剪力滞；滑移；剪切变形；单箱双室
中图分类号：TU441
文献标志码：A
文章编号：1674-4764(2017)03-0020-08
Shear lag effect of twin-cell composite beams considering slip
andsheardeformation
Zhou Shijun',JiangYao'，WuYundan',SongGang',Chen Chen
(1. School of Civil Engineering ; Key Laboratory of New Technology for Construction of Cities in Mountain Area, Ministry of
Education, Chongqing University, Chongqing 400045, P. R. China; 2. Fifth Engineering Corporation of
China Railway 21st Bureau Group, Chongqing 400025 ,P. R. China)
Abstract:The effect of slip of the steel-concrete interface and shear deformation of the steel webs were considered to accurately analyze the shear lag effect of the double-cell composite box girder. The different shear lag warping displacement functions for the top and bottom plates are defined. Based on energy method, the control differential equation and the closed-form solution for the double-cell composite box girder are derived. As an example, the shear lag effect of a single box double-cell composite box girder is analyzed by using proposed method. The results show that the deflection of the composite box girder when considering the slip and the shear deformation is obviously larger than that obtained by the elementary beam solution, and which will decrease with the increase of interface slip stiffness. The slip value is
收稿日期：2016-09-04
基金项目：中铁二十一局课题(16A-2)
作者简介：周世军（1961-），男，教投，博士生导师，主要从事桥梁工程研究，（E-mail）sjzhou8@163.com。
江瑶（通信作者），男，（E-mail)jiangyao@cqu.edu.cn，
Received : 2016-0904
Foundation item: Research Project of China Railway 21 st Bureau Group(No. 16A-2)
Author brief.Zhou Shijun (1961-),professor, doctorial supervisor, main research interest: bridge engineering, (E-mail)
sjzhou8@163. com.
Jiang Yao (corresponding author), (E-mail) jiangyao@cqu. edu. cn.
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