摘要
运用土动力学和结构动力学原理,同时考虑桩周土的弱化效应和桩-土界面的相对滑移效应,利用数理方程方法分别求解单桩与桩周近场土域及远场土域的振动方程,建立了竖向荷载作用下单桩动力阻抗函数的简化计算方法,提出了一种改进的非线性动力Winkler模型,确定了模型中各物理元件的参数,进而通过对比分析验证了计算模型的合理性,从而为桩-土-上部结构耦合系统的非线性分析奠定了基础。
A simplified mechanical model for computing the vertical dynamic impedance function of single pile is established based on a certain assumptions and the improved dynamic model of beam-on-Winkler foundation by using the pri soils around pile during vib ncipl ratio e of soil dynamics and structural dynamics. Both the softening effect of n and slipp characteristics of the frequency-dependency ag of e along the pile-soil interface are taken into account. The dynamic stiffness and damping of pile are reproduced. It is shown through the comparative study on an example that the numerical results of dyna pile computed by the proposed dynamic Winkler model are relatively rational. All these for the nonlinear analysis of dynamic pile-soil-structure interaction system. impedance of provide the base
出处
《计算力学学报》
EI
CAS
CSCD
北大核心
2008年第1期123-128,共6页
Chinese Journal of Computational Mechanics
基金
中国博士后科学基金(20060390806,20060400241)
山东科技大学科学发展基金(05g002)资助项目
关键词
桩基
竖向动力阻抗
相对滑移
竖向振动
pile foundation
vertical dynamic impedance
relative slippage
vertical vibration
