基于可靠度理论的拱梁法的拱坝优化设计

本文用微分和概率论方法对荷载和抗力的统计特征进行处理，求得拱梁分载值和应力分量的方差，通过ＪＣ法可求出反映坝体的抗拉能力和抗压能力两组可靠度指标。并在此基础上，作为随机应力方法的延伸，提出了考虑强度随机性的拱坝优化法，用强度可靠度指标的多准则优化和数学规划相结合的优化模型，进行拱坝体形优化，并编制了程序计算工程实例，得出一些有益的结论。

Optimization Design Based on Multi arch catiliver Method of Reliability

This paper introduces differential and probabilistic method to deal with statistical features of resisting forces and loads. Variance of distribution of load and component of stress can be obtained. Through J C method two groups of reliability index can be obtained, which reflect ability of resistance to tensile stress and compressive stresses of dam body. By further application of stochastic stress analysis method, an optimization model of arch dam was proposed. The model connects optimization of multi criterion of reliability index of strength and mathematical programming to optimize arch dam. A logarithm program has been developed for some engineering projects. Conclusions has been drawn for reference in design.