Vertical dynamic response of differ-defective pipe pile embedded in inhomogeneous soil

被引：0
|
作者：
Cui C.-Y. [1 ,2 ]
Meng K. [1 ]
Wu Y.-J. [3 ]
Yang G. [1 ]
Liang Z.-M. [1 ]
机构：
[1] Department of Civil Engineering, Dalian Maritime University, Dalian
[2] Key Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Beijing
[3] Department of Civil Engineering, Shanghai University, Shanghai
来源：
| 2018年 / Nanjing University of Aeronautics an Astronautics卷 / 31期
关键词：
Complex stiffness transfer model; Dynamic response; Pipe pile; Radial heterogeneity; Viscous damping;
D O I：
10.16385/j.cnki.issn.1004-4523.2018.04.019
中图分类号：
学科分类号：
摘要：
A simplified mechanical model of vertical vibration of the pipe pile embedded in radially inhomogeneous and longitudinally layered viscoelastic soil considering both the variations of cross-section and modulus along the pile shaft is proposed, by employing the viscous damping model and the plane stain model of annular complex stiffness transfer. Firstly, the complex stiffness at the interface between soil and pile is derived based on Laplace transform and complex stiffness transfer method. Secondly, the analytical solutions for dynamic impedance, velocity admittance and reflected wave signal at the pile head are obtained by using the pile-soil compatibility condition of pipe pile and radial inhomogeneous surrounding soil. Furthermore, the obtained analytical solution for dynamic impedance at the pile head is also reduced to verify its validity with existing solution. Finally,an extensive parametric analysis is conducted to investigated the effects of the defective pile segments with variable modulus, necking and expanding, and the corresponding defect locations of pile shaft on the dynamic response at the pile head of the pipe pile embedded in radially inhomogeneous and longitudinal layered viscoelastic soil, which can provide reference and guide for specific engineering practice. © 2018, Nanjing Univ. of Aeronautics an Astronautics. All right reserved.
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页码：707 / 717
页数：10
相关论文
共 33 条
  • [1] Cui C.-Y., Zhang S.-P., Yang G., Et al., Vertical vibration of floating piles in saturated viscoelastic half-spaceconsidering wave effect of subsoil under pile bottom, Chinese Journal of Geotechnical Engineering, 37, 5, pp. 878-892, (2015)
  • [2] Cui C.-Y., Zhang S.-P., Yang G., Et al., Vertical vibration of a floating pile in a saturated viscoelastic soil layer overlaying bedrock, Journal of Central South University, 23, 1, pp. 220-232, (2016)
  • [3] Han Y., Vaziri H., Dynamic response of pile groups under lateral loading, Soil Dynamics & Earthquake Engineering, 11, 2, pp. 87-99, (1992)
  • [4] Wu W.B., Jiang G.S., Dou B., Et al., Vertical dynamic impedance of tapered pile considering compacting effect, Mathematical Problems in Engineering, 2, pp. 1-9, (2013)
  • [5] Novak M., Sheta M., Approximate approach to contact problems of piles, Proceedings of the Geotechnical Engineering Division, American Society of Civil Engineering National Convention, Florida, pp. 53-79, (1980)
  • [6] Novak M., Han Y.C., Impedances of soil Layer with boundary zone, Journal of Geotechnical Engineering, 116, 6, pp. 1008-1014, (1990)
  • [7] Veletsos A.S., Dotson K.W., Impedances of soil layer with disturbed boundary zone, Journal of Geotechnical Engineering, 112, 3, pp. 363-368, (1986)
  • [8] Veletsos A.S., Dotson K.W., Vertical and torsional vibration of foundations in inhomogeneous media, Journal of Geotechnical Engineering, 114, 9, pp. 1002-1021, (1988)
  • [9] Nogami T., Konagai K., Dynamic response of vertically loaded nonlinear pile foundations, Journal of Geotechnical Engineering, 113, 2, pp. 147-160, (1987)
  • [10] Nogami T., Konagai K., Time domain flexural response of dynamically loaded single piles, Journal Engineering Mechanics, ASCE, 114, 9, pp. 1512-1525, (1988)
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