箱梁横向框架内力的程序计算分析

运用平面框架分析的基本方法,对箱形截面梁的横向框架内力进行分析。为了解桥梁沿长度方向上各个截面的横向内力,在梁长度方向截取单位长度的框架,然后用能量原理推导出横向框架单元刚度矩阵及相应等效节点力,并用FORTRAN语言编制相关程序,最后得出在各级荷载组合下箱梁桥横向内力的变化规律。该方法对横向内力的计算比较简便,对找出横向内力最不利作用位置以及横向预应力配筋有参考意义。

Program analysis of Transversal Frame Internal Force in Box Girder

In this paper,the basic method of plane frame analysis has been used to analyze the internal force of transversal frame in box girder.In order to know the transversal internal force of each section which along the ex-tent orientation of bridge,first,to intercept the unit length of framework along the extent orientation of bridge;and then derives out element stiffness matrix of transversal frame and corresponding equivalent nodal force according to the energy principle;with the FORTRAN language preparation p...