特高薄拱坝坝体屈曲分析及应力控制指标的修正

Buckling analysis and modification of stress control index for super high and thin arc dam body

对高薄拱坝几何参数进行了统计分析,根据此分析结果建立了特高薄拱坝稳定分析概化模型.采用空间有限元稳定分析方法对特高薄拱坝的坝体屈曲问题进行了研究,并通过对拱坝的强度和稳定超载分析,得出了拱坝破坏包络曲线.分析结果表明,特高薄拱坝设计时应重视坝体屈曲影响,考虑坝体屈曲影响后应对应力控制指标进行修正.

Based on statistical analysis of geometric parameters of high and thin arc dams, a generalized model for stability analysis of super high arc dams was established. Buckling analysis of super high and thin arc dam bodies was performed by use of the spatial finite element method, and the failure envelops for arch dams were obtained by strength and stability over-loading analysis on arc dams. The result shows that buckling effect should be paid much attention in design of super high and thin arch dams, and the stress control index should be modified when the buckling effect is taken into account.