摘要
对于箱型组合结构,由于应力分布不均,极易导致翼板及底板发生剪切变形,从而对结构安全不利。为了深入探讨单箱双室组合结构中剪滞效应的机理,根据该类结构的受力变形特点,建立混凝土翼板和单箱双室钢梁的纵向翘曲位移模式,得到了控制微分方程及其边界条件,并推导出了在对称荷载作用下单箱双室组合结构的应变及挠度的解析表达式。开展了室内足尺寸模型试验,与剪滞效应理论进行了对比研究,应变、挠度计算值的最大相对误差分别达到15.32%和16.97%。可为该类结构中剪滞效应研究及单箱双室组合结构的工程设计、后期加固提供一定的参考。
Due to the uneven distribution on stress for composite box structures, it is easy to cause shearing distortions on wing-plate and bottom-plate, thus exert negative impact upon structures. In order to in-depth discuss the shear lag mechanism of the simple-box twin-cell composite structure, a longitudinal warping displacement model is established according to its mechanical property and de- formation feature, and its control differential equations and boundary conditions are also obtained. What＇s more, special solution ex- pressions of strain and deflection for this type of structure are deduced under symmetrical loadings in this paper. By conducting full- scale model test, a comparative analysis with the shear lag theory is launched. The results show that the maximum relative errorson cal- culated values of strain and deflection are 15.32% and 16.97% , respectively. Finally, this kind of analysis method can provideguid- ance for composite structure engineering design and late reinforcement.
作者
喻江
胡少伟
卫聪杰
张召广
YU Jiang HU Shaowei WEI Congjie ZHANG Zhaoguang(Department of Materials and Structural Engineering, Nanjing Hydraulic Research Institute, Nanjing 210024, China College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China)
出处
《华北水利水电大学学报（自然科学版）》
2017年第1期52-59,共8页
Journal of North China University of Water Resources and Electric Power：Natural Science Edition
基金
国家杰出青年科学基金(51325904)
国家自然科学基金(51279111)
关键词
单箱双室组合结构
剪滞效应
对称加载
试验研究
对比分析
simple-box twin-cell composite structure
shear lag effect
symmetrical loadings
experimental research
compared analysis
