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弹性支承连续梁的计算方法种类繁多,其中一个分支是逐步渐近法,详见参考文献[1]和[2]所列。本文在此基础上予以改进,即将力矩分配法的概念运用于此类结构。其基本原理亦适用于斜拉桥、拱桥连拱、高桩承台等跨变刚构的计算。通过在一基本计算单位上建立一套与荷载无关的刚构常数作为计算准备工作,当荷载给出时,应用这些刚构常数进行不平衡力矩及竖力分配而求得弹性支承连续梁的近似解。
There are a variety of calculation methods for elastically supported continuous beams, one of which is a stepwise asymptotic method, as detailed in references [1] and [2]. This paper improves on this basis, that is, the concept of moment distribution method is applied to such structures. The basic principle also applies to the calculation of cross-varying rigid-frame structures such as cable-stayed bridges, arched arches, and high pile caps. By setting up a set of rigid-frame-free constants that are not related to the load on a basic unit of calculation as a preparation for calculation, when these loads are given, these rigid-frame constants are used for unbalanced moments and vertical force distribution to obtain an approximation of an elastically supported continuous beam. solution.