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《Journal of Vibration and Shock》 2015-04
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Several problems in seismic response calculation of soil layer with deep deposit using general software

LOU Meng-lin;SHAO Xin-gang;State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University;  
Several problems in seismic response analysis of soil layer with deep deposit were discussed using ANSYS and LS-DYNA. The effects of some factors,such as,selection of calculation scope of soil layer,division of mesh elements,formation of damping matrix,etc. calculation accuracy were analyzed by comparing the numerical results obtained with the general programs. Numerical examples demonstrated that the relationship between the fundamental frequency of soil layer and the predominant frequency of earthquake excitation is an important factor to affect calculation accuracy; when the former is smaller than the latter,especially,much smaller than the latter,the proportional coefficients in damping matrix should be formed with the two frequencies; the vertical and horizontal grid sizes and the selection of artificial boundary have a significant influence on calculation results.
【Fund】: 国家科技支撑项目(2011BAG07B01);; 国家自然科学基金项目(91315301)
【CateGory Index】: TU435
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