摘要
基于Rayleigh-Love杆模型,研究考虑横向惯性效应时非均质土中大直径桩纵向振动特性。首先,采用虚土桩模型模拟桩底土对桩的支承作用,通过径向圈层间的剪切复刚度传递,考虑施工扰动造成的桩周土的径向非均质性;然后,将桩与虚土桩假设为Rayleigh-Love杆,建立其纵向振动控制方程,通过Laplace变换和阻抗函数递推方法,得到桩顶频域响应解析解,并通过Fourier逆变换得到桩顶时域响应半解析解;在此基础上,通过参数分析的方法,研究横向惯性效应对大直径桩纵向振动特性的影响以及与桩–土参数之间的关系;最后,将理论计算结果与现场实测曲线进行对比,验证了本文解的合理性。
Based on the Rayleigh-Love rod model, the vertical vibration of a large diameter pile embedded in inhomogeneous soil is investigated considering the transverse inertia effect. First, the reaction of the soil on the pile tip is simulated byvirtual soil pile model, and the radial inhomogeneity of the surrounding soil caused by the construction disturbance effect is considered by using the vertical shear complex stiffness transfer model. Then, the pile and virtual soil pile are assumed to be Rayleigh-Love rod, and the vertical vibration equation is built. The analytical solution for dynamic response at the pile head is obtained in the frequency domain by virtue of Laplace transform and impedance function transfer method, and the semi-analytical solution in the time domain is derived by inverse Fourier transform. Based on the present solutions, the influence of the transverse inertia effect on the dynamic response at the pile head and its relationship calculated curves are compared with the measured results to the pile-soil parameters are discussed. Finally, the to demonstrate the rationality of the present solution.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2017年第1期243-253,共11页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金面上项目(51378464
51579217)~~
关键词
桩基工程
大直径桩
纵向振动
横向惯性效应
虚土桩
径向非均质
复刚度传递模型
foundation engineering
large diameter pile
vertical vibration
transverse inertia effect
virtual soilpile
radially inhomogeneous
complex stiffness transfer model
作者简介
李振亚（1989-），男，2012年毕业于吉林大学土木工程专业，现为博士研究生，主要从事桩基动力学理论及土工测试方法方面的研究工作。E-mail：jllizhenya@zju．edu．cn。
通讯作者：王奎华（1965-），男，现任教授、博士生导师。E-mail：zdwkh0618@zju．edu．cn
