Dynamic response analysis of Sujiahekou concrete-face rock-fill dam under strong earthquake

As the Sujiahekou concrete-face rock-fill dam(CFRD) is located next to the strong earthquake activity belt,the analyze and evaluation of the safety performance of the dam should be assessed. To archive this goal,this study established the three-dimensional finite element model of the CFRD and corresponding sub model of concrete face and toe board. We used the Hardin-Drnevich constitutive model to calculate and analyze the dynamic response rules of dam's body under strong earthquakes in detail. The results show that under the action of 0. 38 g earthquake,the acceleration,dynamic displacement,dynamic stress,and dynamic deformation of vertical seam and peripheral joint distribution conform to the general rules. There is no special adverse phenomenon; The CFRD can meet seismic requirements. However,the whipping effect of the dam body vibration is obvious and there is a small tensile stress area in 3 /4 dam high above crest and areas close to the downstream slope. Therefore,seismic engineering measures,strengthening the 3 /4 dam high above area panel,dam crest and downstream slope,have been suggested to ensure the safety of the dam in earthquake.