DOI QR코드

DOI QR Code

Parametric Study on Determining Upper Length of Nonhomogeneous Pile installed in Clay

점토지반에 설치된 불균질말뚝의 상부길이 결정을 위한 매개변수 연구

  • 이승현 (선문대학교 토목공학과)
  • Received : 2013.02.26
  • Accepted : 2013.05.09
  • Published : 2013.05.31

Abstract

Parametric studies on nonhomogeneous pile and homogeneous pile installed in clay were performed through the developed technique to investigate the effects of considered factors on the lateral pile behaviors. Values of the parameters with embedment depths of the two piles having different flexural rigidity show that values of the parameters for more rigid pile were greater than those for smaller one. Parameters for the case of the nonhomogeneous pile were converged to the same ones of the homogeneous pile as nodal point moves away from point of material boundary. In order to determine adequate upper length of the nonhomogeneous pile, changing patterns of the parameters, lateral displacement, member forces and so forth should be compared.

점토지반에서 횡방향하중을 받는 불균질말뚝과 균질말뚝의 거동에 영향을 미치는 인자를 파악하고 개발된 해석기법을 적용하여 매개변수 연구를 수행하였다. 매개변수연구에서 고려한 2개의 균질말뚝에 있어 말뚝 근입깊이에 따른 매개변수는 휨강성이 클수록 크게 계산되었다. 불균질말뚝에 대한 매개변수는 재료경계점에서 멀어짐에 따라 동일한 휨강성을 갖는 균질말뚝의 매개변수에 수렴하였다. 균질말뚝과 유사한 하중지지능력을 발휘할 수 있도록 하는 적절한 불균질말뚝의 상부길이를 결정하기 위해서는 균질말뚝과 불균질말뚝의 매개변수 변화양상과 해석을 통해 얻는 횡방향변위 및 부재력 등을 종합적으로 비교해야 한다.

Keywords

References

  1. JASPP, Steel Pipe Pile, Japanese Association for Steel Pipe Piles, 1987.
  2. T. J. Hwang, "Analysis of Composite Pile Behavior under Lateral Loadings", Journal of the Korea Academia-Industrial cooperation Society, Vol. 13, No. 3, pp. 1396-1404, 2012. DOI: http://dx.doi.org/10.5762/KAIS.2012.13.3.1396
  3. Ishida et al., "Static Horizontal Loading Test of Steel and Concrete Composite Pile Group", Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Architectural Institute of Japan, pp.591-598, 2002.
  4. Lee, S. H., Kim, B. I., "Development and Evaluation of Technique for Analyzing Laterally Loaded Piles", Journal of Korean Society of Civil Engineers, Vol. 32, No. 2C, pp. 79-84, 2012. DOI: http://dx.doi.org/10.6108/KSPE.2012.16.1.079
  5. Vesic, A. S., "Bending of beams on isotropic elastic solids", Journal of the Engineering Mechanics Division, ASCE, Vol. 87, Paper No. EN2, April, pp. 35-63, 1961.
  6. Thompson, G. R. Application of the Finite element method to the development of p-y curves for saturated clays, Thesis, Master of Science in Civil Engineering, University of Texas at Austin, 1977.
  7. Kooijman, A. P., "Comparison of an elastoplastic quasi three-dimensional model for laterally loaded piles with field tests", Proceedings, Third International Symposium, Numerical Models in Geomechanics, Elsevier Applied Science, New York, pp. 675-682, 1989.
  8. Yegian, M., and Wright, S. G., "Lateral soil resistance- Displacement relationships for pile foundations in soft clays", Proceedings, Offshore Technology Conference, Houston, TX, Paper No. 1893, pp. 663-676, 1973. DOI: http://dx.doi.org/10.4043/1893-MS
  9. Brown, D. A., Shie, C. F., and Kumar, M., "p-y curves for laterally loaded piles derived from three-dimensional finite element model", Proceedings, Third International Symposium, Numerical Models in Geomechanics, May, Elsevier Applied Science, New York, pp. 683-690, 1989.
  10. Reese, L. C., Cox, W. R., and Koch, F. D., "Field testing and analysis of laterally loaded piles in stiff clay",, Proceedings, VII Annual Offshore Technology Conference, Houston, TX, Vol. 2, Paper No. 2312, pp. 672-690, 1975. DOI: http://dx.doi.org/10.4043/2312-MS
  11. Reese, L. C., and Welch, R. C., "Lateral loading of deep foundations in stiff clay", Proceeding, ASCE, Vol. 101, No. GT7, February, pp. 633-649, 1975.
  12. Matlock, H., "Correlations for design of laterally loaded piles in soft clay", Proceedings, Offshore Technology Conference, Houston, Texas, Paper No. 1204, pp. 577-594, 1970. DOI: http://dx.doi.org/10.4043/1204-MS
  13. Reese, L. C., Isenhower, W. M., and Wang, S. T., Shallow and deep foundations. John Wiley & Sons Inc., pp. 430-435, 2006.