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应用两场交叉迭代解耦技术,建立了应力-渗流相互作用的无单元耦合分析计算模型。详细分析了东方红重力坝在不计应力-渗流耦合和考虑应力-渗流耦合两种情况下,正常蓄水时坝体的位移、应力和渗流位势分布的变化规律。分析表明,考虑耦合作用后,坝体的位移略小,但分布规律一致;坝体的水平正应力分布不同,垂直正应力变化较大,但分布规律一致;耦合作用条件下渗流对重力坝坝体应力的影响是不利的。计算成果符合一般规律。
Using two cross-iterative decoupling techniques, a coupled model of stress-seepage interaction is established. The variation regularity of the displacement, stress and seepage potential distribution of the dam during the normal impoundment is analyzed in detail in the Dongfanghong gravity dam without considering stress-seepage coupling and stress-seepage coupling. The analysis shows that the displacement of the dam body is slightly smaller but the distribution is consistent after the coupling effect is considered. The horizontal normal stress distribution of the dam body varies greatly and the vertical normal stress changes greatly, but the distribution is consistent. Under the coupling effect, The effect of body stress is detrimental. Calculation results in line with the general law.