双肋主梁受压剪力滞分析的有限段法  

FINITE SEGMENT METHOD FOR SHEAR LAG ANALYSIS OF DOUBLE RIBBED MAIN BEAM UNDER AXIAL LOADING

作　　者：李华[1] 郭文武[2] 

机构地区：[1]石家庄铁道学院工程力学系,石家庄050043 [2]石家庄铁道学院机械工程分院,石家庄050043

出　　处：《力学与实践》2005年第5期50-52,共3页Mechanics in Engineering

摘　　要：利用最小势能原理建立双肋主梁在轴向荷载作用下考虑剪力滞效应控制微分方程,在获得方程齐次解后,导出可广泛应用的单元刚度矩阵.算例表明,该方法计算精度较高,方便实际应用,具有很高的工程使用价值.The governing differential equations for double ribbed main beam considering shear lag under axial loading is established by using the principle of the minimum potential energy. The finite element matrixes are derived after the homogeneous solutions of equations are obtained. The numerical calculation results are compared with those from the model test, which shows the convenience and accuracy of the method given in this paper.

关 键 词：双肋主梁 剪力滞 最小势能原理 有限段法 

分 类 号：TU348[建筑科学—结构工程] U448.27[建筑科学—桥梁与隧道工程]