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本文将有效应力原理与土的非线性动力有限单元法有机地结合起来对辽南石门水库心墙砂壳坝进行了二维有效应力动力分析.求得了该坝的非线性静应力以及当基岩地震加速度为0.2g时坝体内的动应力、加速度以及振动孔隙水压力及其随着时间的变化、振动孔隙水压力在坝内的分布规律. 文中对该坝在1975年2月4日著名的辽南地震时产生的滑动作了原因分析.分析指出,该坝的滑动不是由于地震惯性力引起,而是由于震后孔隙水压力的扩散和重分布所致.
In this paper, the effective stress principle and soil nonlinear finite element method are combined organically to conduct two-dimensional effective stress-dynamic analysis of Shimen reservoir core-wall sand-dams dam. The nonlinear static stress of this dam is obtained, Dynamic stress, acceleration and vibration pore water pressure in the dam at the time of earthquake acceleration of 0.2g and their distribution with the passage of time and the distribution of vibrational pore water pressure in the dam are discussed in this article. The dam was famous on February 4, 1975 The analysis of the slip caused during the Liaonan earthquake is analyzed.The analysis shows that the slip of the dam is not caused by the earthquake inertial force but due to the diffusion and redistribution of pore water pressure after the earthquake.