考虑坝—水—地基共同作用影响的挡水坝动力分析

Dynamic analysis of water retaining dam by considering joint function of dam-water-foundation

建立了大坝—库水—地基的动力相互作用模型,并基于三维动力有限单元法对某挡水坝进行了抗震分析。计算得到了坝体的动水压力和坝体的自振特性,并依据《水工建筑物抗震设计规范》所规定的振型分解反应谱法进行了大坝的动力分析,评价了大坝的抗震安全性能,指出了坝体的抗震薄弱部位。

Dynamic interaction model of dam-water-foundation is established for testing earthquake-resistance of water retaining dam based on three-dimension dynamic finite element method. Dynamic water pressure and self-vibration of dam body are calculated. Dam dynamic analyses is carried out based the method of mode destructive response spectrum. Safety of dam earthquake-resistance is evaluated and weak point of dam earthquake-resistance is pointed out.