基于等效应力法的混凝土拱坝有限元分析

Finite Element Analysis of Concrete Arch Dam based on Equivalent Stress Method

有限元法分析拱坝应力时,等效应力计算按等效后坝体的主拉、压应力作为控制指标。本文基于拱坝等效应力计算原理,对照应力控制标准,结合工程实例建立三维有限元模型,计算该拱坝不同荷载作用下坝体上、下游面的等效应力,分析其应力控制标准的适宜性,结论可为高拱坝的等效应力研究提供一定的指导价值。

When the stress of arch dam is analyzed by finite element method,the equivalent stress is calculated according to the main tensile and compressive stress of the equivalent rear dam as the control index.Based on the equivalent stress calculation principle of arch dam,contrasting to the control standard,this paper is to establish a three-dimensional finite element model in accordance with an engineering example for calculating the equivalent stress of upper and lower streams of dam body acted by different loads,meanwhile,to analyze the suitability of stress control standard,which can provide guidance for equivalent stress of high arch dam.