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Journal of Central South University of Technology

, Volume 14, Issue 6, pp 858–863 | Cite as

Buckling analysis of super-long rock-socketed filling piles in soft soil area by element free Galerkin method

  • Zou Xin-jun  (邹新军)Email author
  • Zhao Ming-hua  (赵明华)
  • Liu Guang-dong  (刘光栋)
Article

Abstract

In order to discuss the buckling stability of super-long rock-socketed filling piles widely used in bridge engineering in soft soil area such as Dongting Lake, the second stability type was adopted instead of traditional first type, and a newly invented numerical analysis method, i.e. the element-free Galerkin method (EFGM), was introduced to consider the non-concordant deformation and nonlinearity of the pile-soil interface. Then, based on the nonlinear elastic-ideal plastic pile-soil interface model, a nonlinear iterative algorithm was given to analyze the pile-soil interaction, and a program for buckling analysis of piles by the EFGM (PBAP-EFGM) and are length method was worked out as well. The application results in an engineering example show that, the shape of pile top load—settlement curve obtained by the program agrees well with the measured one, of which the difference may be caused mainly by those uncertain factors such as possible initial defects of pile shaft and the eccentric loading during the test process. However, the calculated critical load is very close with the measured ultimate load of the test pile, and the corresponding relative error is only 5.6%, far better than the calculated values by linear and nonlinear incremental buckling analysis (with a greater relative error of 37.0% and 15.4% respectively), which also verifies the rationality and feasibility of the present method.

Key words

super-long rock-socketed filling pile buckling analysis element free Galerkin method critical load 

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References

  1. [1]
    ZHAO Ming-hua, YANG Ming-hui, ZOU Xin-jun. Vertical bearing capacity of pile based on load transfer model[J]. Journal of Central South University of Technology, 2005, 12(4): 488–493.CrossRefGoogle Scholar
  2. [2]
    ZOU Xin-jun, ZHAO Ming-hua, LIU Guang-dong. Nonlinear finite element analysis of pile group under inclined loads in stratified subgrade[J]. Journal of Central South University: Science and Technology, 2006, 37(4): 820–825. (in Chinese)Google Scholar
  3. [3]
    LEE K L. Buckling of partially embedded piles in sand[J]. Journal of Soil Mechanics and Foundation Division, ASCE, 1968, 94(1): 255–270.Google Scholar
  4. [4]
    REDDY A S, VALSANGKAR A J. Buckling of fully and partially embedded piles[J]. Journal of Soil Mechanics and Foundation Division, ASCE, 1970, 96(6): 1951–1965.Google Scholar
  5. [5]
    ZHAO Ming-hua. Buckling equivalent length of piles[J]. Engineering Mechanics, 1984, 4(1): 94–105. (in Chinese)Google Scholar
  6. [6]
    ZHAO Ming-hua. Buckling analysis and tests of bridge piles[J]. China Journal of Highway and Transport, 1990, 3(4): 47–57. (in Chinese)Google Scholar
  7. [7]
    ZHAO Ming-hua, WANG Ji-bai. Buckling analysis of piles with side resistance considered[J]. Chinese Journal of Geotechnical Engineering, 1996, 18(3): 87–90. (in Chinese)Google Scholar
  8. [8]
    YANG Wei-hao, REN Yan-long. Axial buckling analysis for bottom-fixed pile[J]. Chinese Journal of Rock Mechanics and Engineering, 2000, 19(3): 380–382. (in Chinese)Google Scholar
  9. [9]
    LIU Guang-dong, LUO Han-quan. Stability of Framed Structure[M]. Beijing: The People’s Communications Press, 1998. (in Chinese)Google Scholar
  10. [10]
    ZOU Xin-jun, ZHAO Ming-hua, LIU Guang-dong. Nonlinear buckling analysis of piles with high-rise pile cap[J]. Engineering Mechanics, 2003, 20(S): 342–345. (in Chinese)Google Scholar
  11. [11]
    BELYTSCHKO T, LU Y Y, GU L. Element-free Galerkin methods[J]. International Journal for Numerical Methods in Engineering, 1994, 37(2): 229–256.MathSciNetCrossRefGoogle Scholar
  12. [12]
    LANCASTER P, SALKAUSKAS K. Surface generated by moving least squares methods[J]. Mathematics of Computation, 1981, 37(155): 141–158.MathSciNetCrossRefGoogle Scholar
  13. [13]
    GOODMAN R E, TAYLOR R L, BREKKE T L. A model for the mechanics of jointed rock[J]. Journal of the Soil Mechanics and Foundations Division, ASCE, 1968, 94(3): 637–660.Google Scholar
  14. [14]
    DESAI C S, ZANMAN M M, LIGHTNER J G, et al. Thin layer element for interfaces and joints[J]. International Journal for Numerical and Analytical Methods in Geomechanics, 1984, 8(1): 19–43.CrossRefGoogle Scholar
  15. [15]
    YIN Zong-ze, ZHU Hong, XU Guo-hua. Numerical simulation of the deformation in the interface between soil and structural material[J]. Chinese Journal of Geotechnical Engineering, 1994, 16(3): 14–22. (in Chinese)Google Scholar
  16. [16]
    LUAN Mao-tian, WU Ya-jun. A nonlinear elasto-perfectly plastic model of interface element for soil-structure interaction and its applications[J]. Rock and Soil Mechanics, 2004, 25(4): 507–513. (in Chinese)Google Scholar

Copyright information

© Published by: Central South University Press, Sole distributor outside Mainland China: Springer 2007

Authors and Affiliations

  • Zou Xin-jun  (邹新军)
    • 1
    Email author
  • Zhao Ming-hua  (赵明华)
    • 1
  • Liu Guang-dong  (刘光栋)
    • 1
  1. 1.Institute of Geotechnical EngineeringHunan UniversityChangshaChina

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