求解多层地基上变截面基础梁的链杆法

本文在计算多层地基上变截面基础梁时,对梁和地基分别采用解析解,用混合法建立基本方程,给出了多层地基沉陷系数和变截面梁在集中力、集中力偶、均布力和变温荷载作用下梁挠度的解答。由于充分利用了解析解精度高和链杆法未知数少的特点,使得一般工程问题都能在微型计算机上解决。计算结果表明,采用多层地基上变截面基础梁的计算模型比传统的文克勒地基和半无限地基上等截面基础梁的计算模型更为合理。该计算方案还可以推广应用于双铰底板和分缝浇筑底板的计算中去。

THE RIGID BAR METHOD FOR COMPUTING VARIABLE CROSS SECTION BEAM ON LAYERED FOUNDATION

In this paper, the rigid bar method is used to analyse the variable cross section beam on layered foundation. The settlement coefficient of the layered foundation and the deflection of the variable cross section beam subjected to concentrated force, concentrated reactive couple,distributed load and the temperature change load are given analytically. Because of taking advantage of the high accuracy of analytical solution and the few unknowns of the rigid bar method, the common engineering problems can be solved in micro computer. The computing model provided is more reasonable than Winkler model and half-space model.