(1. School of Civil Engineering，Southwest Jiaotong University，Chengdu，Sichuan 610031，China；2. MOE Key Laboratory of High-speed Railway Engineering，Southwest Jiaotong University，Chengdu，Sichuan 610031，China；3. National Engineering Laboratory for Technology of Geological Disaster Prevention in Land Transportation，Southwest Jiaotong University，Chengdu，Sichuan 610031，China)
Abstract：The resonant phenomena occurring in the small reservoir due to the earthquake are always neglected. The burst of a small moraine-dammed lake may trigger the catastrophe because of the chain effect in Parlung Zangbo river basin. Little attention has been paid to the research of moraine dam failure under the interaction of seismic forces and resonant hydrodynamic pressures. The characteristics of hydrodynamic pressures are studied with the large-scale shaking table. An empirical equation using the mass-spring model is proposed to predict the maximum resonant hydrodynamic pressure. The pseudo-dynamic approach is implemented for the seismic force and a new mode for the global stability analysis based on the limit equilibrium theory is established to take into account the seismic force and resonant hydrodynamic pressures. The differences of global stability with and without water resonance are analyzed. The burst risk assessment of 35 small moraine-dammed lakes are completed for Parlung Zangbo river basin.
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2017, Vol. 36 
