Dynamic Torsional Response of a Pile Partially Embedded in Saturated Soil

Abstract:

The dynamic response of an elastic supporting pile partially embedded in a saturated soil and subjected to a time-harmonic torsional loading is investigated. At first, the pile is divided into two parts along the vertical direction, pile part above the soil and pile part embedded in the soil. Then, based on boundary and continuity conditions of the pile-soil system, the torsional impedance at the top end of the pile part embedded in the soil is obtained. By utilizing the transfer technique of impedance function, the admittance function of the pile top is defined in the frequency domain. By virtue of inverse Fourier transform and convolution theorem, a semi-analytical solution for the velocity response of a pile subjected to a semi-sine wave exciting torque is obtained in the time domain. Finally, selected numerical results are obtained to analyze the influence of main parameters on the torsional vibration characteristics of the pile.

• Periodical: Applied Mechanics and Materials (Volume 509)
• Pages: 27-33
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.509.27
• Online since: February 2014
• Authors: Rui Fu Qin, Zhi Qing Zhang*, Rong Fa Chen
• Keywords: Dynamic Response, Partially Embedded Pile, Saturated Soil, Torsional Loading

References

[1] L.G. Tham, Y.K. Cheung, Z.X. Lei, Torsional dynamic analysis of single piles by time-domain BEM, Journal of Sound and Vibration. 174 (1994) 505-519.

DOI: 10.1006/jsvi.1994.1291

[2] W.M. Liu, M. Novak, Dynamic response of single piles embedded in transversely isotropic layered media, Earthquake Engineering and Structural Dynamics. 23 (1994) 1239-1257.

DOI: 10.1002/eqe.4290231106

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

DOI: 10.1680/geot.1999.49.1.91

[4] Y.Q. Cai, G. Chen, C.J. Xu, D.Z. Wu, Torsional response of pile embedded in a poroelastic medium, Soil Dynamics and Earthquake Engineering. 26 (2006) 1143-1148.

DOI: 10.1016/j.soildyn.2005.10.009

[5] K.H. Wang, Z.Q. Zhang, C.J. Leo, K.H. Xie, Dynamic torsional response of an end bearing pile in saturated poroelastic medium, Computers and Geotechnics. 35 (2008) 450-458.

DOI: 10.1016/j.compgeo.2007.06.013

[6] K.H. Wang, Z.Q. Zhang, C.J. Leo, K.H. Xie, Dynamic torsional response of an end bearing pile in transversely isotropic saturated soil, Journal of Sound and Vibration. 327 (2009) 440-453.

DOI: 10.1016/j.jsv.2009.06.017

[7] Y.Y. Yu, L.F. Yu, Transient wave of the pile with variable modulus embedded partially in homogeneous soil, Journal of Vibration Engineering. 23 (2010) 200-205.

[8] K.H. Wang, W.B. Wu, Z.Q. Zhang, C.J. Leo, Vertical dynamic response of an inhomogeneous viscoelastic pile, Computers and Geotechnics. 37 (2010) 536-544.

DOI: 10.1016/j.compgeo.2010.03.001