高拱坝的开裂与体形优化

通过对小湾拱坝的弹性有限元计算，分析了坝踵区在拉应力作用下裂缝出中能性，进而描述了进行拱坝开裂分析所采用的裂缝模型，并给出了小湾拱坝出现裂的可能范围以及坝踵区应力变化的非线性有限元计算成果，讨论了开裂约束条件下拱坝体型优化的数学模型及强度控制指标和开裂深度控制指标。

The cracking of high arch dam and the dam body optimization

On the basis of the calculations of Xiaowan arch dam by elastic finite element method,this paper analyzes the probability of crack occurrence in dam heel acted by the tensional stress,then describes the crack model which is adopted in the cracking analysis of arch dam and gives the probable area of crack occurrence in Xiaowan arch dam and the non linear finite element calculation results of the stress changes in dam heel.This paper also discusses the mathematical model for arch dam body optimization under the cracking restraint conditions, and the strength control index and crack depth control index of cracking restraint conditions.