基于锥体模型的埋置块式基础有效地震动输入研究  

Research on Effective Earthquake Input of Embedded Block Foundation Based on Cone Model

作　　者：胡灿阳[1,2] 陈清军[2] 徐庆阳[1] 

机构地区：[1]南京审计学院,210029 [2]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《特种结构》2012年第6期59-62,共4页Special Structures

基　　金：科技部国家重点实验室基础研究资助项目(SLDRCE08-B-03);江苏省自然科学研究项目(BK2011693);江苏省高校自然科学研究项目(10KJB560003)

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。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 sim- plified cone model in this paper. Firstly, dynamic equation of soil-structure interaction system is proposed, and re- lationship between soil-structure interaction and foundation effective earthquake input is derived. Secondly ,the em- bedded foundation is modelled with a stack of disks and impedance function of embedded foundation is calculat- ed. 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.

关 键 词：锥体模型 块式基础基础 有效地震输入 埋置基础 土-结构相互作用 

分 类 号：TU435[建筑科学—岩土工程]