Vertical dynamic impedance of pile embedded in viscoelastic soil based on fictitious soil pile model

被引：0

作者：

Wu, Wen-Bing ^{[1
]}

Jiang, Guo-Sheng ^{[1
]}

Deng, Guo-Dong ^{[2
]}

Xie, Bang-Hua ^{[1
]}

机构：

[1] Engineering Faculty, China University of Geosciences, Wuhan, 430074, Hubei

[2] School of Civil Engineering, Central South University, Changsha, 410075, Hunan

来源：

Zhendong yu Chongji/Journal of Vibration and Shock | 2015年 / 34卷 / 07期

关键词：

Analytical solution; Fictitious soil pile model; Laplace transform; Vertical dynamic impedance; Vertical wave effect; Viscoelastic soil;

D O I：

10.13465/j.cnki.jvs.2015.07.030

中图分类号：

学科分类号：

摘要：

Based on fictitious soil pile model, the vertical dynamic response of pile embedded in homogeneous viscoelastic soil was investigated. Assuming the surrounding soil of pile to be isotropic viscoelastic material and considering its vertical wave effect, the definite problem of soil-pile system subjected to arbitrary dynamic force was established based on the Euler-Bernoulli rod theory. The shear dynamic stiffness at the interface of soil and pile was derived by means of separation of variables to solve the governing equation of surrounding soil. Substituting the shear dynamic stiffness acquired into the governing equation of pile, the analytical solution of vertical dynamic impedance was deduced by virtue of Laplace transform technique. Based on the obtained solution, the influence of depth of pile end soil on the vertical dynamic impedance was studied in detail with different design parameters of pile. Constrast analysis was made between the fictitious soil pile model and other pile end soil supporting models. It is shown that the complex supporting stiffness calculated by fictitious soil pile model is in the middle of the supporting stiffnesses calculated by other existing models if adopting appropriate material parameters and proper depth of pile end soil in the fictitious soil pile model. ©, 2015, Chinese Vibration Engineering Society. All right reserved.

引用

页码：192 / 198and202

共 24 条

[1]

Novak M., Beredugo Y.O., Vertical vibration of embedded footings, Journal of the Soil Mechanics and Foundations Division, ASCE, 98, 12, pp. 1291-1310, (1972)

[2]

Nogami T., Konagai K., Time domain axial response of dynamically loaded single piles, Journal of Engineering Mechanics, ASCE, 112, 11, pp. 1241-1252, (1986)

[3]

Wang K.-H., Xie K.-H., Zeng G.-X., Analytical solution to vibration of finite length pile under exciting force and its application, Chinese Journal of Geotechnical Engineering, 19, 6, pp. 27-35, (1997)

[4]

Kong D.-S., Luan M.-T., Yang Q., Review of dynamic Winkler model appfied in pile-soil interaction analyses, World Earthquake Engineering, 21, 1, pp. 12-17, (2005)

[5]

Liu D.-J., Longitudinal waves in piles with exponentially varying cross sections, Chinese Journal of Geotechnical Engineering, 30, 7, pp. 1066-1071, (2008)

[6]

Wang K.H., Wu W.B., Zhang Z.Q., Et al., Vertical dynamic response of an inhomogeneous viscoelastic pile, Computers and Geotechnics, 37, 4, pp. 536-544, (2010)

[7]

Nogami T., Novak M., Soil-pile interaction in vertical vibration, Earthquake Engineering and Structural Dynamics, 4, 3, pp. 277-293, (1976)

[8]

Veletsos A.S., Dotsos K.W., Vertical and torsional vibration of foundations in inhomogeneous media, Journal of Geotechnical Engineering, ASCE, 114, 9, pp. 1002-1021, (1988)

[9]

Militano G., Rajapakse R.K.N.D., Dynamic response of a pile in a multi-layered soil to transient torsional and axial loading, Geotechnique, 49, 1, pp. 91-109, (1999)

[10]

Wang H.-D., Shang S.-P., Research on vertical dynamic response of single-pile in radially inhomogeneous soil during passage of Rayleigh waves, Journal of Vibration Engineering, 19, 2, pp. 258-264, (2006)

← 1 2 3 →