埋置块式基础地基阻抗函数的简化计算方法研究  

Simplified calculation method for impedance function of embedded block foundation

作　　者：胡灿阳[1,2] 陈清军[2] 徐庆阳[1] 熊琴琴[1] 

机构地区：[1]南京审计学院江苏省公共工程审计重点实验室 [2]同济大学土木工程防灾国家重点实验室

出　　处：《振动与冲击》2011年第5期252-256,共5页Journal of Vibration and Shock

基　　金：科技部国家重点实验室基础研究资助项目(SLDRCE08-B-03);江苏省高校自然科学研究项目(10KJB560003);江苏省高校优势学科建设工程资助项目(PADD)

摘　　要：目前关于地基阻抗的分析和计算方法都比较繁琐,不易为工程设计人员所掌握。基于此,提出了埋置基础地基阻抗函数的简化计算方法。首先,采用锥体模型分析均质半空间内埋置圆盘一维振动波的传播过程,得到了平动和转动时的地基阻抗。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地基阻抗函数。最后,通过算例表明此方法计算效率高,误差小,适用于工程计算。Analysis and calculation methods for impedance function of a foundation are complicated,and it is difficult for engineering designers to grasp and use them.A simplified method was proposed here to calculate impedance function of a foundaton embedded in a half-space.Firstly,based on a cone model,one-dimensional vibration wave propagating of a rigid massless circular disk embedded in a homogeneous half-space was analysed.Impedance functions of translational and rotational cone models were derived.Then,the embedded foundation was modeled with a stack of disks and its impedance function was calculated.The model was validated by comparing the results with the rigorous analysis ones.The numerical results indicated that this method has higher precision and efficiency,it is applicable for engineering calculation.

关 键 词：锥体模型 块式基础 阻抗函数 埋置基础 土-结构相互作用 

分 类 号：TU470.3[建筑科学—结构工程]