【摘要】 用子结构法分析土-结构相互作用时,需要知道基础的有效地震输入。本文利用锥体简化模型研究埋置块式基础的有效地震动输入。首先,建立土-结构相互作用体系的基本运动方程,得到土-结构相互作用和基础有效地震输入之间的关系。在此基础上,利用埋置圆盘组来模拟埋置基础,分析得到了埋置基础有效地震动输入。最后,通过算例表明此方法具有很高的精度,适用于工程计算。更多还原

【Abstract】 Foundation effective earthquake input is required when soil-structure interaction is analysed by substructure method.Foundation effective earthquake input of embedded block foundation is researched using simplified cone model in this paper.Firstly,dynamic equation of soil-structure interaction system is proposed,and relationship between soil-structure interaction and foundation effective earthquake input is derived.Secondly,the embedded foundation is modelled with a stack of disks and impedance function of embedded foundation is calculated. Finally,the model is validated in the paper.The numerical results indicate that this method has high precision and efficiency,which is applicable to engineering.更多还原