%0 Journal Article
%T 变截面连续箱梁剪力滞分析的有限梁段法<br>Finite segment method of shear lag analysis of continuous box girders with variable height
%A 周朋
%A 蔺鹏臻&lt
%A br&gt
%A ZHOU Peng
%A LIN Pengzhen
%J 铁道科学与工程学报
%D 2018
%X 采用基于剪切变形规律的翘曲位移函数的有限梁段法分析变截面连续箱梁的剪力滞效应。此翘曲位移函数的定义是根据剪力滞效应源于翼板剪切变形所致这一机理出发的，原理更加明确。在选定的剪力滞翘曲位移函数基础上，通过变分法建立箱梁剪力滞控制微分方程，然后用有限梁段法来分析变截面连续箱梁的剪力滞效应。变截面连续箱梁的截面几何尺寸沿梁长度方向会发生变化，因此还需结合当量截面法以及叠加原理。分析变截面连续箱梁在不同荷载工况下典型截面及其沿梁纵向的剪力滞效应，并与相应的有限元、有限段法解析结果进行比较，结果吻合良好，从而验证了本文方法的准确性。<br>The finite segment method, which is based on the warping displacement function of shear deformation, was employed to analyze the shear lag effect of continuous box girder bridges with variable depth. The warping displacement function is defined from the shear lag effect caused by the shear deformation of the wing plate, the principle of which is more explicit. Based on the selected warping displacement function of shear lag, the governing differential equation for shear lag of box girders was established according to the variational principles. The finite beam segment method was then used to analyze the shear lag effect of continuous box girder with variable height. As regards continuous box girder bridges with variable depth, its section geometry along the beam length direction changes, therefore it also needs to combine the equivalent section method and superposition principle. The shear lag effect of the typical section and along the longitudinal direction of the continuous box girder with variable cross-section under different loading conditions were analyzed, the results obtained from the finite segment procedure accurately agree with those from finite element and finite segment method, which validates the effectiveness of the present analytical method
%K 变截面箱梁
%K 剪力滞
%K 有限梁段
%K 叠加原理&lt
%K br&gt
%K box girder with variable depth
%K shear lag
%K finite segment method
%K superposition principle
%U http://www.jrse.cn/paper/paperView.aspx?id=paper_317765