水坝抗震分析的两种有限元模型比较

Comparison of Two Different FEM Models for Dam Safety Analysis under Serious Earthquake

以一种实际的芯墙堆石水坝的抗震问题为例 ,比较了把水当作压力边界仅研究坝体的有限元模型和把水、坝体、地基作为一个系统的有限元模型的计算结果 ,分析指出 :把水处理成压力边界的作法实际上弱化了问题的液 -固动力耦合特性 ,不能得到最危险的状态 ;而把水 -坝体

Taking a full size rock filled dam as an example, the calculation results with two different FEM models involved in dam safety analysis under serious seismic shock are compared. One model treats the water as pressure boundary and ignores the dynamic coupling effect between the dam and water. The other model treats the water dam base as a whole system, therefore it would represent better dynamic aspect of the practical situation and the calculation results would give the most dangerous case that may happen.