Taking the effect of finite soil layers below pile end into account,the longitudinal dynamic response of pile undergoing dynamic loading in layered soil was theoretically investigated.Firstly,finite soil layers below ...Taking the effect of finite soil layers below pile end into account,the longitudinal dynamic response of pile undergoing dynamic loading in layered soil was theoretically investigated.Firstly,finite soil layers below pile end are modeled as virtual soil pile whose cross-section area is the same as that of the pile and the soil layers surrounding the pile are described by the plane strain model.Then,by virtue of Laplace transform and impedance function transfer method,the analytical solution of longitudinal dynamic response at the pile head in frequency domain is yielded.Also,the semi-analytical solution in time domain undergoing half-cycle sine pulse at the pile head is obtained by means of inverse Laplace transform.Based on these solutions,a parametric study is conducted to analyze emphatically the effects of parameters of soil below pile end on velocity admittance and reflected wave signals at the pile head.Additionally,a comparison with other models with different supporting conditions from soil below pile end is performed to verify the model presented.展开更多
A new approach is proposed to analyze the settlement behavior for single pile embedded in layered soils.Firstly,soil layers surrounding pile shaft are simulated by using distributed Voigt model,and finite soil layers ...A new approach is proposed to analyze the settlement behavior for single pile embedded in layered soils.Firstly,soil layers surrounding pile shaft are simulated by using distributed Voigt model,and finite soil layers under the pile end are assumed to be virtual soil-pile whose cross-section area is the same as that of the pile shaft.Then,by means of Laplace transform and impedance function transfer method to solve the static equilibrium equation of pile,the analytical solution of the displacement impedance function at the pile head is derived.Furthermore,the analytical solution of the settlement at the head of single pile is theoretically derived by virtue of convolution theorem.Based on these solutions,the influences of parameters of soil-pile system on the settlement behavior for single pile are analyzed.Also,comparison of the load-settlement response for two well-instrumented field tests in multilayered soils is given to demonstrate the effectiveness and accuracy of the proposed approach.It can be noted that the presented solution can be used to calculate the settlement of single pile for the preliminary design of pile foundation.展开更多
基金Project(50879077) supported by the National Natural Science Foundation of China
文摘Taking the effect of finite soil layers below pile end into account,the longitudinal dynamic response of pile undergoing dynamic loading in layered soil was theoretically investigated.Firstly,finite soil layers below pile end are modeled as virtual soil pile whose cross-section area is the same as that of the pile and the soil layers surrounding the pile are described by the plane strain model.Then,by virtue of Laplace transform and impedance function transfer method,the analytical solution of longitudinal dynamic response at the pile head in frequency domain is yielded.Also,the semi-analytical solution in time domain undergoing half-cycle sine pulse at the pile head is obtained by means of inverse Laplace transform.Based on these solutions,a parametric study is conducted to analyze emphatically the effects of parameters of soil below pile end on velocity admittance and reflected wave signals at the pile head.Additionally,a comparison with other models with different supporting conditions from soil below pile end is performed to verify the model presented.
基金Project(50879077) supported by the National Natural Science Foundation of China
文摘A new approach is proposed to analyze the settlement behavior for single pile embedded in layered soils.Firstly,soil layers surrounding pile shaft are simulated by using distributed Voigt model,and finite soil layers under the pile end are assumed to be virtual soil-pile whose cross-section area is the same as that of the pile shaft.Then,by means of Laplace transform and impedance function transfer method to solve the static equilibrium equation of pile,the analytical solution of the displacement impedance function at the pile head is derived.Furthermore,the analytical solution of the settlement at the head of single pile is theoretically derived by virtue of convolution theorem.Based on these solutions,the influences of parameters of soil-pile system on the settlement behavior for single pile are analyzed.Also,comparison of the load-settlement response for two well-instrumented field tests in multilayered soils is given to demonstrate the effectiveness and accuracy of the proposed approach.It can be noted that the presented solution can be used to calculate the settlement of single pile for the preliminary design of pile foundation.
