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基于Biot提出的动力固结理论,研究了轴对称条件下饱和土体中部分埋入桩的扭转振动问题.将桩沿纵向划分为两段,完全埋入土体的桩段1和土体之上的桩段2.利用分离变量法求解得到土体扭转振动位移形式解.利用桩土体系的边界和衔接条件,以及阻抗函数的递推原理,求得了桩顶扭转阻抗和速度导纳的解析解及速度时域响应的半解析解.通过参数分析研究了主要参数桩基振动特性的影响.
Based on the theory of dynamic consolidation proposed by Biot, the torsional vibration of partially embedded piles in saturated soil under axisymmetric conditions is studied. The pile is longitudinally divided into two sections and fully buried in pile section 1 and soil 2. Using the method of separation variables to solve the torsional vibration displacement solution of soils, the solution to the torsional impedance and velocity admittance of the pile top is obtained by using the boundary conditions of the pile-soil system and the recursion of the impedance function Solution and velocity semi-analytical solution of time domain response.Analysis of the main parameters of pile foundation vibration characteristics by parameter analysis.