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针对高坝动力灾变过程控制这一核心科学问题,首次提出高坝气幕隔震控制的液-气-固三相耦合建模理论和数值实现方法,给出三相强耦合-热力学状态-材料-接触/非接触双重非线性的复杂动力学问题的理论描述和气幕隔震高坝工程的动力灾变关键效应的全过程数值模拟;给出刚性坝-平面波简化情况的解析解.完成了高305m锦屏拱坝的地震灾变过程控制与非控制的对比模拟,结果与振动台实验相互印证,基本相符.提出整体式气室和变厚度优化气幕,发展了高坝控制优化方法.首次完成大型振动台拱坝隔震的模型实验并满足基本动力相似准则,实验数据合理可信,并与模型坝的动力模拟结果基本符合,为模拟理论方法提供了实验验证.数值模型与物理模型相结合的试验表明,动水压力削减可达70%以上,坝体第一/第三主应力峰值降低20%～30%以上,有效地提高了高坝工程的整体抗震能力,表明气幕减震是高混凝土坝防震控制的优先发展方向.
Aiming at the core scientific problem of dynamic catastrophic process control of high dam, the theory and numerical implementation method of liquid-gas-solid three-phase coupling modeling for high dam air curtain isolation control are proposed for the first time. The three-phase strong coupling-thermodynamic state-material - The theoretical description of the complex nonlinear dynamics of contact / non-contact and the numerical simulation of the whole process of dynamic catastrophic key effects of air curtain isolation dam project; The simplified solution of rigid dam-plane wave is given. The comparison between controlled and uncontrolled seismic disaster process of Jinping arch dam shows that the results are consistent with those of shaking table experiment.An integral air chamber and variable thickness air curtain are proposed and the control optimization of high dam is developed.The first large-scale The model experiment of shaking table arch dam isolation and meet the basic dynamic similarity criterion, the experimental data is reasonable and credible, and with the dynamic simulation results of model dam basically agree, provide experimental verification for simulation theory method.Numerical model combined with physical model Experiments show that the hydrodynamic pressure can be reduced by more than 70%, and the peak of the first / third principal stress of the dam can be reduced by 20% ~ 30%, effectively increasing the overall dam project Seismic capacity, indicating that the air curtain damping is a priority for high concrete dam prevention development.