高拱坝结构的随机分析

Random Analysis on High Arch Dam Structure

拱坝结构涉及到许多不确定性因素,把拱坝的主要荷载及材料参数看作随机变量,结合小湾拱坝进行了5000次蒙特卡罗随机有限元模拟,得出影响拱坝效应场的主要随机因素及其敏感性.结果表明,坝体混凝土的弹模及密度对应力场影响很大,故在实际工程中应严把混凝土施工质量关,如果把地基看作连续整体,其弹模对效应场的影响并不是很大.

There are many uncertainties in high arch dams.The main loads and material parameters were regarded as random variables in this paper.The Monte Carlo FEM simulation was done in Xiaowan Arch Dam for5000times.The sensitivities of random variables were gain to give suggestions for the designer.The elastic model and density of concrete have an important impact on the stress field.If the base was considered as a continuous body,its elastic model has an affect on the result field slightly.