基于附加挠度的悬臂箱梁剪力滞效应分析  

Analysis of Shear Lag Effect Based on Additional Deflection

作　　者：杨龙[1] 张元海[1] 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070

出　　处：《兰州工业学院学报》2016年第1期39-43,共5页Journal of Lanzhou Institute of Technology

摘　　要：通过选取剪力滞效应所引起的附加挠度作为研究对象,并在定义了新的广义内力及广义翘曲位移函数的基础上,运用能量变分原理建立了剪力滞效应的控制微分方程,并以广义剪力、广义力矩、附加挠度及其变化率作为四个初参数,然后根据箱梁的边界条件,给出微分方程的初参数解,导出了悬臂箱梁在均布荷载和集中荷载作用下的附加挠度和广义力矩的计算公式,分析了悬臂梁在荷载作用下的挠度和截面应力,并通过与ANSYS的比较来验证文章分析方法的正确性.Using shear lag caused by additional deflection as researching object, based on defining new internal force and warping displacement, differential equation for shear lag was established, which has four parameters： generalized shear, generalized moment, additional deflection and deflection＇s variation. Then solution was given. The formula for additional deflection and generalized moment was deduced under uniform load and centralized load, cantilever＇s section stress and deflection are analyzed under load. The method proposed in this paper is verified as correct by comparing results with ANSYS.

关 键 词：剪力滞效应 广义内力 初参数解 附加挠度 

分 类 号：U441[建筑科学—桥梁与隧道工程]