基于非均匀地震动输入下的岩质边坡动力反应分析

Rock Slope Based On Non-uniform Power input Ground Motion Response Analysis

分析了地震动非均匀输入的基本原理以及在ANYSY软件中的实现过程,并通过相关算例验证了其可行性。给出了在ANSYS/LS-DYNA软件中实现粘弹性边界的方法,并引用2个算例分别对二维、三维问题进行分析,算例结果证明了粘弹性边界在该软件输入中的正确性以及该边界的稳定性。运用基于大质量法的多点地震动输入,分析了锦屏一级电站高边坡在非均匀地震动输入下的动力响应,表明传统的一致均匀输入是过于保守的。

Basic principles of non-uniform input of ground motion and the implementation process for ANYSY software are introduced in details,and feasibility of the operation is verified using relavant examples.Intoducing the method of inputing the viscous-spring boundary in the ANSYS/LS-DYNA,two typical models of calculating the two dimension and there dimension problems are presented and analyzed,which indicate that the input of the boundary in ANSYS/LS-DYNA is correct and results are very stable.With input of the massive multi-point ground motion,analysis of responses under non-uniform seismic input for the high slope of Jinping Hydropower Station shows that the traditional uniform input line is too conservative.