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为对拱坝进行优化,满足拱坝相关的一套优化准则,列出了15个坝体体型的几何参数,称为拱坝优化要素。通过评估这15个要素,使拱坝优化更为明确合理。这里所采用的优化准则,涉及坝体混凝土方量最小和大坝安全性最高这两个条件。通过合理利用所拟定的优化程序,明确所选择的优化要素,就可大量减少为确定最佳拱坝体型所需的繁锁计算和大量人力投入。在比较满足基本荷载和特殊荷载组合安全准则的拱坝体型基础上,下一步就可确定最小混凝土方量的最佳体型。可采用有限元法确定拱坝的应力应变场及其动态特性。基于上述考虑,已开发出计算机软件程序,并在现有和拟建拱坝体型优化分析中得到运用。
In order to optimize the arch dam to meet the arch dam-related optimization guidelines, the geometrical parameters of 15 dam body types are listed, which are called arch dam optimization factors. By evaluating these 15 elements, arch dams are optimized more clearly and rationally. The optimization guidelines adopted here relate to the two conditions of minimum concrete mass and maximum dam safety. By making rational use of the proposed optimization procedure and specifying the chosen optimization factors, the cumbersome calculation and extensive manpower investment required to determine the optimal arch dam shape can be significantly reduced. On the basis of comparing arch body shape of the arch dam that meets the safety criteria of basic load and special load combination, the best shape of the minimum concrete square can be determined in the next step. The finite element method can be used to determine the stress and strain field and its dynamic characteristics of arch dam. Based on the above considerations, computer software programs have been developed and used in the optimization analysis of existing and proposed arch dams.