【摘要】 对结构-土相互作用体系中结构基础底面积和结构基础埋深对体系地震反应的影响进行了研究。基于有限元分析方法建立了结构-土相互作用三维计算模型,通过改变结构底面积及基础埋深在不同地震动下进行了地震反应分析。结果表明,考虑相互作用时,在同一种地震动作用下,结构顶层总位移及基础转动随着结构底面积的增大而明显减小,上部结构本身位移在总位移中所占比例随着底面积的增加而增大;底面积相同,结构顶层总位移及基础转动均随着埋置深度的增大而减小,上部结构本身位移在总位移中所占比例随着埋置深度的增加而增大。比较不同特性的地震动,不同底面积及埋深结构顶层总位移、基础转动、基础平动和结构自身位移的变化规律趋势相同。更多还原

【Abstract】 The influence of the change of structure base areas and depths of foundation on seismic responses was studied for the structure-soil interaction system.Based on the finite element method,the structure-soil interaction three-dimensional calculation model was established.We analyzed the seismic response by changing the structure base areas and depths of foundation and choosing different earthquake ground motions.The results considering structure-soil interaction show that,under the same earthquake ground motions,the total displacement on the top floor of the structure and the foundation rotation displacement decrease with the increase of structure base area.The proportion of superstructure displacement due to self-deformatlon to total displacement increases with the increase of structure base area.The top displacement and the foundational rotational displacement decrease with the increase of depth of foundation for the structure with the same base area,and the proportion of superstructure displacement due to self-deformation to the total displacement increases with the increase of depth of foundation.Comparing the results under different seismic ground motions,the changes of foundation rotational displacement,foundation horizontal translation and superstructure displacement due to self-deformation show the same trend.更多还原