Longitudinal vibration of pile in layered soil based on Rayleigh-Love rod theory and fictitious soil-pile model  

作　　者：吕述晖 王奎华 吴文兵 C.J.LEO 

机构地区：[1]Key Laboratory of Soft Soils and Geoenvironmental Engineering of Ministry of Education(Zhejiang University) [2]Engineering Faculty, China University of Geosciences [3]School of Computing, Engineering and Mathematics, University of Western Sydney,Locked Bag 1797, Penrith, Sydney, NSW 2751, Australia

出　　处：《Journal of Central South University》2015年第5期1909-1918,共10页中南大学学报（英文版）

基　　金：Projects(51378464,51309207)supported by the National Natural Science Foundation of China

摘　　要：The dynamic response of pile in layered soil is theoretically investigated when considering the transverse inertia effect.Firstly, the fictitious soil-pile model is employed to simulate the dynamic interaction between the pile and the soil layers beneath pile toe. The dynamic interactions of adjacent soil layers along the vertical direction are simplified as distributed Voigt models.Meanwhile, the pile and fictitious soil-pile are assumed to be viscoelastic Rayleigh-Love rods, and both the radial and vertical displacement continuity conditions at the soil-pile interface are taken into consideration. On this basis, the analytical solution for dynamic response at the pile head is derived in the frequency domain and the corresponding quasi-analytical solution in the time domain is then obtained by means of the convolution theorem. Following this, the accuracy and parameter value of the hypothetical boundaries for soil-layer interfaces are discussed. Comparisons with published solution and measured data are carried out to verify the rationality of the present solution. Parametric analyses are further conducted by using the present solution to investigate the relationships between the transverse inertia effects and soil-pile parameters.The dynamic response of pile in layered soil is theoretically investigated when considering the transverse inertia effect.Firstly, the fictitious soil-pile model is employed to simulate the dynamic interaction between the pile and the soil layers beneath pile toe. The dynamic interactions of adjacent soil layers along the vertical direction are simplified as distributed Voigt models.Meanwhile, the pile and fictitious soil-pile are assumed to be viscoelastic Rayleigh-Love rods, and both the radial and vertical displacement continuity conditions at the soil-pile interface are taken into consideration. On this basis, the analytical solution for dynamic response at the pile head is derived in the frequency domain and the corresponding quasi-analytical solution in the time domain is then obtained by means of the convolution theorem. Following this, the accuracy and parameter value of the hypothetical boundaries for soil-layer interfaces are discussed. Comparisons with published solution and measured data are carried out to verify the rationality of the present solution. Parametric analyses are further conducted by using the present solution to investigate the relationships between the transverse inertia effects and soil-pile parameters.

关 键 词：viscoelastic pile layered soil longitudinal vibration fictitious soil-pile transverse inertia effect 

分 类 号：TU435[建筑科学—岩土工程]