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《Journal of Disaster Prevention and Mitigation Engineering》 2015-04
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Cracking of High Arch Dam under Strong Earthquake and Air-cushion Isolation Effects

CHEN Jiang;XIONG Feng;GE Qi;College of Architecture and Environment,Sichuan University;Key Laboratory of Energy Engineering Safety and Disaster Mechanics,Ministry of Education,Sichuan University;  
Based on the triple phases of the gas-liquid-solid coupling model,the effects of the aircushion isolation control on the isolation and anti-cracking of the high arch dams were researched.In this study,the cracking behaviors of concrete was firstly considered in the coupling model and a numerical simulation of a 300 mlevel dam with and without air-cushion under the action of the three-different-seismic intensities was carried out by finite element method.The results indicate that the hydrodynamic pressure and acceleration responses of dam upstream face significantly reduced by the air-cushion.Additionally,cracking range of the dam body is also reduced.The isolation rule of the air-cushion is that the higher the seismic intensity,the more significant isolation effect of the hydrodynamic pressure and dam acceleration is.The maximum of hydrodynamic pressure is reduced by more than 70%,the acceleration of dam crest is reduced by more than 50%with 1mair-cushion.
【Fund】: 能源工程安全与灾害力学教育部重点实验室开放基金项目(2013KF07)资助
【CateGory Index】: TV642.4;TV312
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