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中文摘要：
应用动力弹塑性分析方法对高土石坝的地震反应特性和破坏机理进行了系统研究。通过研究地震动作用下坝体的剪应变、永久位移以及网格变形的变化规律,并与振动台模型试验的结果进行对比,说明了坝体上部1/5范围内变形较大,竖向地震动对坝坡稳定性影响明显,验证了FLAC程序模拟高土石坝地震反应的合理性;同时分析了坝高、坝坡和地震动峰值参数变化对大坝破坏形态的影响,研究结果为大坝的设计、安全评价和抗震措施研究提供理论基础。
英文摘要：
The main purpose is to study the seismic response and failure mechanism of high earth-rockfill dams under earthquakes by using dynamic elasto-plastic methods. The main concerned aspects are the shear strain, the permanent deformation as well as the grid deformation during earthquakes considering the seismic wave input of one-direction and two-direction. The results show that larger deformation occurs in the upper scope （1 / 5） of the dam, and the vertical seismic input has obvious impact on the slope stability. The results of the shaking table tests verify the reasonableness of FLAC procedures in simulating the seismic response of high earth-rockfill dams. At the same time, the influences of parameter changes of dam height, slope and ground motion on failure modes of dams are systematically studied. The results are valuable for the design of projects, the standard of safety assessment and the choice of the anti-seismic measures.
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