Vertical vibration of a floating pile in a saturated viscoelastic soil layer overlaying bedrock  

作　　者：崔春义 张石平 杨刚 李晓飞 

机构地区：[1]Institute of Road and Bridge Engineering,Dalian Maritime University [2]School of Civil Engineering,Beijing University of Technology

出　　处：《Journal of Central South University》2016年第1期220-232,共13页中南大学学报（英文版）

基　　金：Projects(50809009,51578100) supported by the National Natural Science Foundation of China;Projects(3132014326,3132015095) supported by the Fundamental Research Funds for the Central Universities of China

摘　　要：An axisymmetrical analytical solution is developed to investigate the vertical time-harmonic vibration of a floating pile in a saturated viscoelastic soil layer overlaying bedrock. The soil is described by porous medium model established by Boer, while the pile is described by a beam vibration theory. By using separation theory of differential operator and variables to solve the dynamic governing equations for the soil, the fundamental solutions for the soil reactions on side and bottom of the pile are obtained. The dynamic impedance of the pile head is then derived by solving the vibration equation for the pile according to the compatibility condition between the pile and the soil. The proposed model is validated by comparing special cases of our model with the existing results. Numerical examples are presented to analyze the vibration characteristics of the pile.An axisymmetrical analytical solution is developed to investigate the vertical time-harmonic vibration of a floating pile in a saturated viscoelastic soil layer overlaying bedrock. The soil is described by porous medium model established by Boer, while the pile is described by a beam vibration theory. By using separation theory of differential operator and variables to solve the dynamic governing equations for the soil, the fundamental solutions for the soil reactions on side and bottom of the pile are obtained. The dynamic impedance of the pile head is then derived by solving the vibration equation for the pile according to the compatibility condition between the pile and the soil. The proposed model is validated by comparing special cases of our model with the existing results. Numerical examples are presented to analyze the vibration characteristics of the pile.

关 键 词：floating pile vertical vibration saturated viscoelastic soil Boer＇s porous medium model separation theory 

分 类 号：TU435[建筑科学—岩土工程] TU473.1[建筑科学—土工工程]