Geomechanics and Engineering

  • 제30권6호
  • /
  • Pages.579-586
  • /
  • 2022
  • /
  • 2005-307X(pISSN)
  • /
  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Evaluation of seismic p-yp loops of pile-supported structures installed in saturated sand

  • Yun, Jungwon (Department of Civil Engineering, Korea Army Academy at Yeongcheon) ;
  • Han, Jintae (Department of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Kim, Doyoon (Department of Civil Engineering, Korea Army Academy at Yeongcheon)
  • 투고 : 2022.06.30
  • 심사 : 2022.09.12
  • 발행 : 2022.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

Pile-supported structures are installed on saturated sloping grounds, where the ground stiffness may decrease due to liquefaction during earthquakes. Thus, it is important to consider saturated sloping ground and pile interactions. In this study, we conduct a centrifuge test of a pile-supported structure, and analyze the p-yp loops, p-yp loops provide the correlation between the lateral pile deflection (yp) and lateral soil resistance (p). In the dry sand model (UV67), the p-yp loops stiffness increased as ground depth increased, and the p-yp loops stiffness was larger by approximately three times when the pile moved to the upslope direction, compared with when it moved to the downslope direction. In contrast, no significant difference was observed in the stiffness with the ground depth and pile moving direction in the saturated sand model (SV69). Furthermore, we identify the unstable zone based on the result of the lateral soil resistance (p). In the case of the SV69 model, the maximum depth of the unstable zone is five times larger than that of the dry sand model, and it was found that the saturated sand model was affected significantly by kinematic forces due to slope failure.

키워드

과제정보

This research was supported by the "Korea Institute of Civil Engineering and Building Technology (KICT), grant number 20220332-001" and "Korea Institute of Marine Science & Technology Promotion (KIMST), grant number 2016-0065".

참고문헌

  1. Boulanger, R.W., Curras, C.J., Kutter, B.L., Wilson, D.W. and Abghari, A. (1999), "Seismic soil-pile-structure interaction experiments and analyses", J. Geotech. Geoenviron. Eng., 125(9), 750-759. https://doi.org/10.1061/(ASCE)1090-0241(1999)125:9(750).
  2. Gerolymos, N. and Gazetas, G. (2005), "Phenomenological model applied to inelastic response of soil-pile interaction systems", Soil. Found., 45(4), 119-132. https://doi.org/10.3208/sandf.45.4_119.
  3. Haigh, S.K. and Gopal Madabhushi, S.P. (2011), "Centrifuge modelling of pile-soil interaction in liquefiable slopes", Geomech. Eng., 3(1), 1-16. https://doi.org/10.12989/gae.2011.3.1.001.
  4. Kim, D.S., Kim, N.R., Choo, Y.W. and Cho, G.C. (2013), "A newly developed state-of-the-art geotechnical centrifuge in Korea", KSCE J. Civil Eng., 17(1), 77-84. https://doi.org/10.1007/s12205-013-1350-5.
  5. Kim, Y.S. and Choi, J.I. (2017), "Nonlinear numerical analyses of a pile-soil system under sinusoidal bedrock loadings verifying centrifuge model test results", Geomech. Eng., 12(2), 239-255. https://doi.org/10.12989/gae.2017.12.2.239.
  6. Lees, A.S. and Richards, D.J. (2011), "Centrifuge modelling of temporary roadway systems subject to rolling type loading", Geomech. Eng., 3(1), 45-59. https://doi.org/10.12989/gae.2011.3.1.045.
  7. Li, Z., Escoffier, S. and Kotronis, P. (2016), "Centrifuge modeling of batter pile foundations under sinusoidal dynamic excitation", Bull. Earthq. Eng., 14(3), 673-697. https://doi.org/10.1007/s10518-015-9859-2.
  8. Ling, H.I., Mohri, Y. and Kawabata, T. (1999), "Seismic analysis of sliding wedge: Extended Francais-Culmann's analysis", Soil Dyn. Earthq. Eng., 18(5), 387-393. https://doi.org/10.1016/S0267-7261(99)00005-6.
  9. Manandhar, S., Kim, S.N., Ha, J.G., Ko, K.W., Lee, M.G. and Kim, D.S. (2021). "Liquefaction evaluation using frequency characteristics of acceleration records in KAIST centrifuge tests for LEAP", Soil Dyn. Earthq. Eng., 140, 106332. https://doi.org/10.1016/j.soildyn.2020.106332.
  10. MATLAB (2016), MATLAB Version R2016a, a Computer Program, The Mathworks Inc., Natick, MA-USA.
  11. Matlock, H. (1970), "Correlations for design of laterally loaded piles in soft clay", Proceedings: Second Offshore Technology Conference, Huston, Texas, USA, April.
  12. McCullough, N.J., Dickenson, S.E., Schlechter, S.M. and Boland, J.C. (2007), "Centrifuge seismic modeling of Pile-supported wharves", Geotech. Test. J., 30(5), 349-359. https://doi.org/10.1520/GTJ14066.
  13. MOF (Ministry of Oceans and Fisheries) (2014), Design Standards of Harbour and Port, Ministry of Oceans and Fisheries, Sejong, Korea. (in Korean)
  14. Murchison, J.M. and O'Neill, M.W. (1984,), "Evaluation of P-Y relationships in cohesionless soils", Analysis and Design of Pile Foundations, 174-191, October.
  15. Nguyen, B.N., Tran, N.X., Han, J.T. and Kim, S.R. (2018), "Evaluation of the dynamic p-yp loops of pile-supported structures on sloping ground", Bull. Earthq. Eng., 16(12), 5821-5842. https://doi.org/10.1007/s10518-018-0428-3.
  16. Nogami, T., Otani, J., Konagai, K. and Chen, H.L. (1992), "Nonlinear soil-pile interaction model for dynamic lateral motion", J. Geotech. Eng., 118(1), 89-106. https://doi.org/10.1061/(ASCE)0733-9410(1992)118:1(89)
  17. Park, S., Kim, J.H., Kim, S.J., Park, J.H., Kwak, K.S. and Kim, D.S. (2021), "Centrifuge modelling of rock-socketed drilled shafts under uplift load", Geomech. Eng., 24(5), 431-441. https://doi.org/10.12989/gae.2021.24.5.431.
  18. PIANC (International Navigation Association) (2001), Seismic Design Guidelines for Port Structures, International Navigation Association, Rotterdam, Netherlands.
  19. Reese, L.C., Cox, W.R. and Koop, F.D. (1974), "Analysis of laterally loaded piles in sand", Proceeding: 6th Offshore Technology Conference, Huston, Texas, May.
  20. Tran, N.X., Bong, T., Yoo, B.S. and Kim, S.R. (2021b), "Evaluation of the soil-pile interface properties in the lateral direction for seismic analysis in sand", Soil Dyn. Earthq. Eng., 140, 106473. https://doi.org/10.1016/j.soildyn.2020.106473.
  21. Tran, N.X., Nguyen, B.N., Yoo, B.S. and Kim, S.R. (2021a), "Slope effect on dynamic p-y backbone curve in dry sand", Soil Dyn. Earthq. Eng., 144, 106693. https://doi.org/10.1016/j.soildyn.2021.106693.
  22. Yoo, M.T., Choi, J.I., Han, J.T. and Kim, M.M. (2013), "Dynamic P-Y curves for dry sand from centrifuge tests", J. Earthq. Eng., 17(7), 1082-1102. https://doi.org/10.1080/13632469.2013.801377.
  23. Yun, J.W. and Han, J.T. (2020), "dynamic behavior of pilesupported structures with batter piles according to the ground slope through centrifuge model tests", Appl. Sci., 10(16), 5600. https://doi.org/10.3390/app10165600.
  24. Yun, J.W. and Han, J.T. (2021), "Evaluation of soil spring methods for response spectrum analysis of pile-supported structures via dynamic centrifuge tests", Soil Dyn. Earthq. Eng., 141, 106537. https://doi.org/10.1016/j.soildyn.2020.106537.
  25. Yun, J.W., Han, J.T. and Kim, J.K. (2021), "Evaluation of seismic performance of Pile-supported wharves installed in saturated sand through response spectrum analysis and dynamic centrifuge model test", J. Korean Geotech. Soc., 37(12), 71-87. (in Korean) https://doi.org/10.7843/kgs.2021.37.12.73.
  26. Yun, J.W., Han, J.T. and Kim, S.R. (2019), "Evaluation of virtual fixed points in the response spectrum analysis of a Pilesupported wharf", Geotechnique Lett., 9(3), 238-244. https://doi.org/10.1680/jgele.19.00013.
  27. Yun, J.W., Jin, T.H. and Kim, J.K. (2022), "Evaluation of the virtual fixed-point method for seismic design of pile-supported structures" KSCE J. Civil Eng., 26, 596-605. https://doi.org/10.1007/s12205-021-0422-1.