Influence of Randomness of Strong Ground Motion on Hydrodynamic Pressure of Gravity Dam
The influence of the ground motion randomness on the hydrodynamic pressure of gravity dams,which can-not be considered by methods from the code,is investigated in this paper.Firstly,based on the series solution of Wester-gaard,the feasibility of the acoustic-structure coupling method for simulation of the hydrodynamic pressure is investiga-ted.Then,based on 25 selected natural waves and 25 generated artificial waves,the influence of the randomness of strong ground motions on the hydrodynamic pressure is investigated.The results show that the series solution of Wester-gaard is only suitable for low excitation frequencies,and the acoustic-structure coupling method is universal for different excitation frequencies.The distribution of the hydrodynamic pressure is consistent with the Westergaard method in rigid foundation conditions,and is similar to the hydrodynamic pressure coefficient given by the code in flexible foundation con-ditions.The deviation of the maximum hydrodynamic pressure from the mean value by artificial wave randomness is from 16.1%to 22.2%,while the ones by natural wave randomness is from 39.4%to 49.8%.The influence of the random-ness from the natural waves is about 2.0-2.5 times that from the artificial waves.
gravity damhydrodynamic pressureacoustic-structure couplingrandomness of strong ground motionsWestergaard method
万方数据
维普
