Seismic response analysis of concrete gravity dam based on acoustic-structural coupling method
In order to explore the influence of dam-reservoir interaction on dam dynamic response,the acoustic-structural coupling method is used to describe the dynamic coupling process of reservoir water and dam body and the distribution characteristics of hydrodynamic pressure on the dam surface under strong earthquake action.The dynamic response analysis model of dam-reservoir water-foundation coupling system is established to study the damage development process of the dam body under strong earthquake action.Through comparing with actual earthquake damage,model test and existing research results,the reliability of the calculation method is verified.Besides,the differences between the acoustic-structural coupling method and the traditional additional mass method in simulating the interaction process of reservoir water and dam are compared from the aspects of dam displacement,stress response characteristics and failure mode.The results show that the seismic hydrodynamic pressure can significantly enhance the nonlinear dynamic response of the dam,the acoustic-structural coupling method can effectively simulate the damage development process of the dam and the distribution characteristics of hydrodynamic pressure on the dam surface.The response results of displacement,stress and failure mode of the dam body calculated by acoustic-structural coupling method are more in line with the actual situation than by additional mass method.
gravity damacoustic-structural coupling methodadditional mass methodseismic responsefailure mode
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