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分析拱坝施工期的自重应力,不仅可了施工过程中坝体的应力状况,而且通过对实际施工过程的模拟计算,能正确地估计自重在运行期对坝体应力的影响。采用多拱梁法模拟高拱坝实际施工过程计算自重应力在国内系属首次。它既不是按传统的多拱梁法的自重假定,又不同于简化的有限元法对自重的处理,而是依据初设阶段拟定的坝体浇筑、封拱过程线,对自重在各个时期作不同情况的计算,显然更加符合实际情况。经与结构模型试验和三维有限元法计算结果比较,应力趋势一致,数值接近,完全可满足初步设计需要。
Analysis of the self-weight stress of the arch dam during construction not only shows the stress state of the dam during construction, but also accurately estimates the influence of the self-weight on the dam stress through the simulation calculation of the actual construction process. Using multiple arch beam method to simulate the actual construction process of high arch dam self - weight stress is the first time in China. It is neither according to the traditional multi-arch method of self-weight assumption, but also different from the simplified finite element method to deal with the weight, but based on the initial stage of the dam pouring, arch sealing process line, the weight of each period for Calculation of different situations is obviously more in line with the actual situation. Compared with the results of structural model test and three-dimensional finite element method, the stress trends are consistent and the numerical values are close to each other, which can completely meet the preliminary design needs.