摘要
基于拱坝全调整拱梁分载法的基本原理，导出了材料非线性条件下的拱梁刚度方程，给出了裂缝扩展的判别与跟踪方法，并在分载法框架下研究裂缝对拱、梁应力应变的影响，形成了非线性全调整分载法．算例表明文中所述方法可行，计算结果合理．该成果可模拟拱坝在超载或材料缺陷条件下的非线性变形、开裂、裂缝扩展直至压碎破坏的全过程，可用于评估拟建和已建拱坝的安全度．
The paper presents a nonlinear analysis algorithm for arch dam.Based on the basic principle of trial load method,The arch and cantilever's rigidness equation with nonlinear material property is derived.The methods for determining and tracing the crack extension are given.The influences of crevices to the stress and strain of dam body are studied.The methods can be used for engineering design and safety assessment of arch dams.
