弹性支承连续梁与弹性地基梁的静力及动力分析

本文导出弹性支承连续梁各跨度的内力及形变递推计算公式,据以编制程序,用微型计算机计算。本程序对于解算变截面杆件的连续梁及绘制内力图特别方便;除用于静力计算外,还可推广应用于连续梁的动力计算。对于弹性地基梁来说,也可离散为若干跨弹性支承梁计算。对于一根具有不同弯曲刚度、基床系数的弹性地基梁,用本法计算,远较其他解析法,如微分方程法或Light-foot的弯矩分配法等直接便利得多。

THE STATIC AND DYNAMIC ANALYSIS OF CONTINOUS BEAM ON CONTINOUS BEAM ON EIASTIC SNPPORTS OR EIASTIC FOUNADTION

Deformation prvpagation method is used in this calculation. According to the beam end conditions, two initial variables are adapted to berived the propagated formulas by conjugate beam method, These formulas are used to calonlate internal forces and deformations at each support step by step. The initial variables are determined by end conditions at the last support. For dynamic analysis, each spar of continuous beam may be seperated in ten parts which are assumed to be supported by virtual elastic springs whose elastic constants are zero. The internal forces due to vertical deformations of beam are assumed to act on actual and virtual supports. This method may also be extended to analysic beams on elastic foundation. These computations maybe completed using PC. 1500 computer.