堆石流变对金钟混凝土面板堆石坝应力变形的影响分析

采用三参数流变模型,运用有限元法对金钟面板堆石坝进行三维流变分析,得到了考虑堆石流变后坝体、面板的应力变形.分析研究了堆石流变对混凝土面板堆石坝坝体、面板应力变形特性的影响.结果表明,考虑堆石的流变效应后,坝体变形有所增加,坝内拉应力区域变大,最大拉、压应力值有所增加;面板的挠度和轴向变形都有所增加,面板的拉应力区域和拉应力值也有所增加,而面板压应力区域有所减少,但最大压应力值却有所增加.

Analysis of effects of rockfill rheology on stress and deformation of Jinzhong concrete- faced rockfill dam

3 parameters rheological model and finite element method are used for 3-D rheological analysis of Jinzhong concrete-faced rockfill dam.The stress and deformation of the dam body and the face slab are obtained.The influence of rockfill rheology on stress and deformations in the dam body and the face slab of concrete-faced rockfill dam are analyzed and studied.The computation results show that the deformation of dam has increased,the tension stress region of dam and the largest tension and pressure press shows increment.The panel deflection and axial deformation have increased,and the panel's tension stress and its region also have increased,but the panel's pressure stress region has reduced,its largest pressure stress has increased.