地震作用下库水位变动对结石坝动力特性影响研究OA

To investigate the impact of reservoir water level fluctuation under seismic actions on the dynamic characteristics of the stone Dam,this study analyzed the influence patterns of different reservoir water levels on the dynamic stress and hydrodynamic pressure with numerical computation.The results show that:① When considering the compressibility of reservoir water,the extreme values of hydrodynamic pressure in the 0-100 m area from the dam foundation are significantly higher than those in the case where the reservoir water is incompressible.At a distance of 80 m from the dam foundation,the extreme value of dynamic hydraulic pressure reaches 1.60 times that of the incompressible water conditions.② Under compressible reservoir water conditions,the peak dynamic pressure stress occurs at 120 m from the dam foundation.The peak dynamic pressure stress at 60 m from the dam foundation increases by 201.07%compared to that at the 0m level,while at 120 m,it rises by 47.17%compared to 60 m.At 160 m from the dam foundation,it decreases by 88.18%compared to that at 120 m.③At a distance of 100m from the dam foundation,the peak dynamic pressure stress follows the characteristic of 150 m>100 m>50 m>empty reservoir state.When the reservoir water level is 150 m,the extreme dynamic pressure stress increases by 16.07%compared to that in the empty reservoir state.