珊溪水库面板堆石坝地震动力响应分析

Analysis on seismic dynamic response of concrete face rock-fill dam of Shanxi Reservoir

采用三维非线性动力有限元分析方法,对珊溪水库大坝在设计地震作用下进行地震响应分析,研究面板和坝体动位移反应、加速度反应和动应力等,并对坝基覆盖层的地震液化可能性进行分析。研究结果表明,在地震烈度为7度时,珊溪水库大坝震陷率较小,坝基不会发生地震液化。

The 3D non-linear dynamic FEM is adopted herein to analyzed the seismic dynamic response of the dam of Shaxi Res- ervoir under the effect of the design earthquake, in which the dynamic displacement response, acceleration response, dynamic stress, etc. of the concrete face slab and the dam body are studied, while the possibility of the seismic liquefaction from the over- burden of the dam foundation is analyzed as well. The study result shows that when the seismic intensity is 7degrees, the rate of seismic settlement is smaller, and then no seismic liquefaction is to occur as well.