上游水位变化对堆石坝变形特性影响分析

Influences of change of water level on upstream of rockfill dam on dam deformation characteristics

为了研究和预测堆石坝在不同蓄水位期受上游水位变化所产生的变形特性,利用具有较好非线性分析能力的ABAQUS有限元软件和邓肯-张E-B本构模型,建立了不同蓄水位期的堆石坝数学仿真模型和分析步进行数值模拟计算,得到了不同水位下垂直和水平变形。计算结果表明,堆石坝垂直方向的变形受上游水位变化影响较小,水平方向的变形受水位影响较大。

In order to research and forecast the influences of change of water level on upstream of rockfilldam on dam deformation characteristics,ABAQUS software is used to simulate deformation characteristicsof rockfill dam. Duncan-Chang nonlinear constitutive model is used to character relation between stress andstrain for rockfill materials. The vertical and horizontal deformation distributions on dam are computed in dif-ferent loading cases. The computational results show that the change of water level on upstream of rockfilldam has less effect on vertical deformation,and has more effect on horizontal deformation.