한국지반공학회논문집 (Journal of the Korean Geotechnical Society)

  • 제36권6호
  • /
  • Pages.17-34
  • /
  • 2020
  • /
  • 1229-2427(pISSN)
  • /
  • 2288-646X(eISSN)
한국지반공학회 (Korean Geotechnical Society)
권호 표지
DOI QR코드

DOI QR Code

잔교식 구조물의 응답스펙트럼 해석법 개선사항 도출 연구: 고유주기 및 입력지반가속도를 중점으로

Study on Improvement of Response Spectrum Analysis of Pile-supported Structure: Focusing on the Natural Periods and Input Ground Acceleration

  • 윤정원 (과학기술연합대학원대학교(UST) 건설환경공학과) ;
  • 한진태 (한국건설기술연구원 인프라안전연구본부) ;
  • 김종관 (한국건설기술연구원 인프라안전연구본부)
  • Yun, Jung-Won (Dept. of Civil and Environmental Eng., Korea Univ. of Science & Technology) ;
  • Han, Jin-Tae (Dept. of Infrastructure Safety Research, Korea Institute of Civil Engrg. and Building Technology) ;
  • Kim, Jong-Kwan (Dept. of Infrastructure Safety Research, Korea Institute of Civil Engrg. and Building Technology)
  • 투고 : 2020.04.06
  • 심사 : 2020.05.26
  • 발행 : 2020.06.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

일반적으로 잔교식 구조물의 내진설계를 위한 응답스펙트럼 해석 시 기준서들에서는 지진응답해석을 통해 증폭된 가속도를 입력가속도 활용하도록 제시하고 있으나, 기준서에 따라 방법이 상이하여 설계 시 혼란을 야기할 수 있다. 이에, 본 연구에서는 동적원심모형실험을 통해 지반 내 다양한 깊이에서 지반 가속도를 산정하였으며, 산정된 지반가 속도를 활용하여 응답스펙트럼 해석을 수행하였다. 이후 실험 및 해석을 통해 도출된 잔교식 안벽 구조물의 모멘트 결과를 비교하였으며, 응답스펙트럼 해석 시 적절한 입력지반가속도를 결정하기 위한 방법을 제시하고자 하였다. 실험 및 해석을 비교한 결과, 탄성 지반 스프링을 적용하는 경우 구조물의 고유주기를 가장 적절하게 모사하는 것으로 나타났으며, 상부 지표면에서 증폭된 지진파를 입력가속도로 활용하는 것이 사질토 지반에 관입된 구조물 응답을 가장 합리적으로 모사하는 것으로 나타났다.

In response spectrum analysis of pile-supported structure, an amplified seismic wave should be used as the input ground acceleration through the site-response analysis. However, each design standard uses different input ground acceleration criteria, which leads to confusion in determining the appropriate input ground acceleration. In this study, the ground accelerations were calculated through dynamic centrifuge model test, and the response spectrum analysis was performed using the calculated ground acceleration. Then, the moments derived from the test and analysis were compared, and a method for determining the appropriate input ground acceleration in response spectrum analysis was presented. Comparison of the experimental and simulated results reveals that modeling of the ground using elastic springs allows proper simulation of the natural period of the structure, and the use of a seismic wave that is amplified at the ground surface as the input ground acceleration provided the most accurate results for the response analysis of pile-supported structures in sands.

키워드

참고문헌

  1. ASCE (American Society of Civil Engineering) (2014), "Seismic design of piers and wharves", USA: ASCE/COPRI 61-14.
  2. Balomenos, G.P. and Padgett, J.E. (2018), "Fragility Analysis of Pile-supported Wharves and Piers Exposed to Storm Surge and Waves", Journal of Waterway, Port, Coastal, and Ocean Engineering, Vol.144, No.2, pp.04017046. https://doi.org/10.1061/(ASCE)WW.1943-5460.0000436
  3. CEN (European Committee for Standardization) (1998), "EN 1998-2: Eurocode 8: Design of structures for earthquake resistance. Part 2: Bridges", European Committee for Standardization, Brussels, Belgium.
  4. Chen, Y. (1997), "Assessment on Pile Effective Lengths and their Effects on Design-I. Assessment", Computers & Structures, Vol. 62, No.2, pp.265-286. https://doi.org/10.1016/S0045-7949(96)00201-5
  5. Chiou, J.S. and Chen, C.H. (2007), "Exact Equivalent Model for a Laterally-loaded Linear Pile-soil System", Soils and Foundations, Vol.47, No.6, pp.1053-1061. https://doi.org/10.3208/sandf.47.1053
  6. Davisson, M.T. (1970), "Lateral load capacity of piles", Highway Research Record, (333).
  7. Gazetas, G. (1987), "Seismic Response of Earth Dams: Some Recent Developments", Soil Dynamics and Earthquake Engineering, Vol.6, No.1, pp.2-47. https://doi.org/10.1016/0267-7261(87)90008-X
  8. Gazetas, G., Garini, E., and Zafeirakos, A. (2016), "Seismic Analysis of Tall Anchored Sheet-pile Walls", Soil Dynamics and Earthquake Engineering, Vol.91, pp.209-221. https://doi.org/10.1016/j.soildyn.2016.09.031
  9. Gerolymos, N. and Gazetas, G. (2005), "Phenomenological Model Applied to Inelastic Response of Soil-pile Interaction Systems", Soils and Foundations, Vol.45, No.4, pp.119-132. https://doi.org/10.3208/sandf.45.4_119
  10. Ha, J.G., Park, H.J., LEE, M., Lee, H., and Kim, D.S. (2017), "September. Seismic behavior of LNG storage tank considering soil-foundation-structure-interaction with different foundation types", In 19th International Conference on Soil Mechanics and Geotechincal Engineering. Korean Geotechnical Society.
  11. 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 Journal of Civil Engineering, Vol.17, No.1, pp.77-84. https://doi.org/10.1007/s12205-013-1350-5
  12. Kiureghian, A.D. (1981), "A Response Spectrum Method for Random Vibration Analysis of MDF Systems", Earthquake Engineering & Structural Dynamics, Vol.9, No.5, pp.419-435. https://doi.org/10.1002/eqe.4290090503
  13. Kiureghian, A.D. and Neuenhofer A. (1992), "Response Spectrum Method for Multi-support Seismic Excitations", Earthquake Engineering & Structural Dynamics, Vol.21, No.8, pp.713-40. https://doi.org/10.1002/eqe.4290210805
  14. Lagos, L.L.G. (2005), "Centrifuge modeling of permeability and pinning reinforcement effects on pile response to lateral spreading", Rensselaer Polytechnic Institute.
  15. Laurendeau, A., Cotton, F., Ktenidou, O.J., Bonilla, L.F., and Hollender, F. (2013) "Rock and Stiff-soil Site Amplification: Dependency on VS 30 and Kappa (${\kappa}0$)", Bulletin of the Seismological Society of America, Vol.103, No.6, pp.3131-3148. https://doi.org/10.1785/0120130020
  16. Lee, S.H., Choo, Y.W., and Kim, D.S. (2013), "Performance of an Equivalent Shear Beam (ESB) Model Container for Dynamic Geotechnical Centrifuge Tests", Soil Dynamics and Earthquake Engineering, Vol.44, pp.102-114. https://doi.org/10.1016/j.soildyn.2012.09.008
  17. Meyerhof, G.G. (1956), "Penetration Tests and Bearing Capacity of Cohesionless Soils", Journal of the Soil Mechanics and Foundations Division, Vol.82, No.1, pp.1-19.
  18. Midas FE. (2016), "Analysis and Algorithm Manual", MIDAS FEA, Gyeonggi, Korea.
  19. MLTM (Ministry of Land, Transport and Maritime Affairs) (2012), "Seismic performance evaluation & improvement revision of existing structures (harbours)", Korea Infrastructures Safety and Technology Corporation, Sejong, Korea (in Korean).
  20. MOF (Ministry of Oceans and Fisheries) (1999), "Seismic design standards of harbour and port", Ministry of Oceans and Fisheries, Sejong, Korea (in Korean).
  21. MOF (Ministry of Oceans and Fisheries) (2014), "Design standards of harbour and port", Ministry of Oceans and Fisheries, Sejong, Korea (in Korean).
  22. Nair, K., Gray, H., and Donovan, N. (1969), "Analysis of pile group behavior", In Performance of deep foundations, ASTM International.
  23. Nguyen, B.N., Tran, N.X., Han, J.T., and Kim, S.R. (2018), "Evaluation of the Dynamic p-y p Loops of Pile-supported Structures on Sloping Ground", Bulletin of Earthquake Engineering, Vol.16, No.12, pp.5821-5842. https://doi.org/10.1007/s10518-018-0428-3
  24. Ovesen, N.K. (1979), "The Scaling Law Relationship-panel Discussion", In Proc. 7th European Conference on Soil Mechanics and Foundation Engineering, Brighton, pp.319-323.
  25. PARI (Port and Airport Research Institute) (2009), "Technical standards and commentaries for port and harbour facilities in Japan", Overseas Coastal Area Development Institute, Tokyo, Japan.
  26. PIANC (International Navigation Association) (2001), "Seismic design guidelines for port structures", International Navigation Association, Rotterdam, Netherlands.
  27. API (RP2A-WSD, A.P.I.) (2000), "Recommended practice for planning, designing and constructing fixed offshore platforms-working stress design", American Petroleum Institute.
  28. Su, L., Dong, S.L., and Kato, S. (2006), "A new average response spectrum method for linear response analysis of structures to spatial earthquake ground motions", Engineering Structures, Vol. 28, No. 13, pp. 1835-1842. https://doi.org/10.1016/j.engstruct.2006.03.009
  29. Taghavi, S., and Miranda, E. (2010), "Response Spectrum Method for Estimation of Peak Floor Acceleration Demand", In Improving the Seismic Performance of Existing Buildings and Other Structure, Beijing, China. pp.627-638.
  30. Terzaghi, K. (1955), "Evalution of Conefficients of Subgrade Reaction", Geotechnique, Vol.5, No.4, pp.297-326. https://doi.org/10.1680/geot.1955.5.4.297
  31. Wilkinson, J.H. (1965), "The algebraic eigenvalue problem" (Vol. 662), Clarendon: Oxford.
  32. Yoo, M.T., Choi, J.I., Han, J.T., and Kim, M.M. (2013), "Dynamic py Curves for Dry Sand from Centrifuge Tests", Journal of Earthquake Engineering, Vol.17, No.7, pp.1082-1102. https://doi.org/10.1080/13632469.2013.801377
  33. Yoo, M.T., Han, J.T., Choi, J.I., and Kwon, S.Y. (2017), "Development of Predicting Method for Dynamic Pile behavior by Using Centrifuge Tests Considering the Kinematic Load Effect", Bulletin of Earthquake Engineering, Vol.15, No.3, pp.967-989. https://doi.org/10.1007/s10518-016-9998-0
  34. Yun, J.W., Han, J.T., and Kim, S.R. (2019), "Evaluation of Virtual Fixed Points in the Response Spectrum Analysis of a Pile-supported Wharf", Geotechnique Letters, Vol.9, No.3, pp.238-244. https://doi.org/10.1680/jgele.19.00013