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Geomechanics and Engineering Volume 16, Number 6, December30 2018 , pages 609-618 DOI: https://doi.org/10.12989/gae.2018.16.6.609 |
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Dynamic response of pipe pile embedded in layered visco-elastic media with radial inhomogeneity under vertical excitation |
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Chun Y. Cui, Kun Meng, Ya J. Wu, David Chapman and Zhi M. Liang
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| Abstract | ||
| A new mechanical model for predicting the vibration of a pipe pile embedded in longitudinally layered visco-elastic media with radial inhomogeneity is proposed by extending Novak\'s plain-strain model and complex stiffness method to consider viscous-type damping. The analytical solutions for the dynamic impedance, the velocity admittance and the reflected signal of wave velocity at the pile head are also derived and subsequently verified by comparison with existing solutions. An extensive parametric analysis is further performed to examine the effects of shear modulus, viscous damping coefficient, coefficient of disturbance degree, weakening or strengthening range of surrounding soil and longitudinal soft or hard interbedded layer on the velocity admittance and the reflected signal of wave velocity at the pile head. It is demonstrated that the proposed model and the obtained solutions provide extensive possibilities for practical application compared with previous related studies. | ||
| Key Words | ||
| analytical solution; dynamic response; inhomogeneous soil; viscous-type damping; pile-soil interaction; pipe pile | ||
| Address | ||
| Chun Y. Cui, Kun Meng and Zhi M. Liang: Department of Civil Engineering, Dalian Maritime University, Dalian, 116026, China Ya J. Wu: Department of Civil Engineering, Shanghai University, Shanghai, 200072, China David Chapman:School of Engineering, University of Birmingham, Birmingham, B15 2TT, U.K. | ||