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《Journal of Disaster Prevention and Mitigation Engineering》 2009-04
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Simulation of Dynamic Modulus and Damping Ratio Test on Filter Material by Particle Flow Code

LIU Han-long1,GAO De-qing1,CHEN Yu-min1,LI Guo-ying2(1.Key Laboratory for Ministry of Education for Geomechanics and Embankment Engineering,Geotechnical Research Institute,Hohai University,Nanjing 210098,China;2.Geotechnical Department,Nanjing Hydraulic Research Institute,Nanjing 210024,China)  
According to dynamic triaxial test of the filter material,the 2D particle flow code approach of discrete element method is applied to generate numerical sample to simulate the dynamic shear modulus and damping ratio test,and the undrained condition is performed by maintaining the volume unchanged.The suitable behavior is obtained by adjusting micro-contact parameters and comparing with the real test result.The micro analysis of dynamic triaxial test is exerted by monitoring coordinate number,porosity and excess pore water pressure during the test.After discussing the effects of consolidation ratios and compactness on maximal modulus,it is confirmed that the effects of consolidation ratios of filter material on maximal shear modulus conform the results of Hardin formula.According to comparison between test and simulation,it is found that the numerical simulation of dynamic shear modulus and damping ratio test on filter material by particle flow code is feasible,and the law of micro behavior conforms with the laboratory test.
【Fund】: 水利部公益性行业科研专项经费项目(200801014);; 国家杰出青年科学基金项目(50825901)资助
【CateGory Index】: TV41
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