Steel and Composite Structures

  • 제42권2호
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  • Pages.209-219
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  • 2022
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Seismic response evaluation of fixed jacket-type offshore structures by random vibration analysis

  • Abdel Raheem, Shehata E. (Civil Engineering Dept., Faculty of Engineering, Assuit University) ;
  • Abdel Aal, Elsayed M. (Offshore Projects Engineer, Egypt Gas Company) ;
  • AbdelShafy, Aly G.A. (Civil Engineering Dept., Faculty of Engineering, Assuit University) ;
  • Fahmy, Mohamed F.M. (Civil Engineering Dept., Faculty of Engineering, Assuit University)
  • 투고 : 2020.04.25
  • 심사 : 2021.12.01
  • 발행 : 2022.01.25
⟨ 이전 논문 다음 논문 ⟩

초록

Offshore platforms in seismically active areas must be designed to survive in the face of intense earthquakes without a global structural collapse. This paper scrutinizes the seismic performance of a newly designed and established jacket type offshore platform situated in the entrance of the Gulf of Suez region based on the API-RP2A normalized response spectra during seismic events. A nonlinear finite element model of a typical jacket type offshore platform is constructed taking into consideration the effect of structure-soil-interaction. Soil properties at the site were manipulated to generate the pile lateral soil properties in the form of load deflection curves, based on API-RP2A recommendations. Dynamic characteristics of the offshore platform, the response function, output power spectral density and transfer functions for different elements of the platform are discussed. The joints deflection and acceleration responses demands are presented. It is generally concluded that consideration of the interaction between structure, piles and soil leads to higher deflections and less stresses in platform elements due to soil elasticity, nonlinearity, and damping and leads to a more realistic platform design. The earthquake-based analysis for offshore platform structure is essential for the safe design and operation of offshore platforms.

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참고문헌

  1. Abdel Raheem, S.E. (2014), "Study on nonlinear response of steel fixed offshore platform under environmental loads", Arab. J. Sci. Eng., 39(8), 6017-6030. https://doi.org/10.1007/s13369-014-1148-x.
  2. Abdel Raheem, S.E. (2016), "Nonlinear behavior of steel fixed offshore platform under environmental loads", Ships Offshore Struct., 11(1), 1-15. https://doi.org/10.1080/17445302.2014.954301.
  3. Abdel Raheem, S.E. and Abdel Aal, E. (2013), "Finite element analysis for structural performance of offshore platforms under environmental loads", Key Eng. Mater., 569-570, 159-166. https://doi.org/10.4028/www.scientific.net/KEM.569-570.159.
  4. Abdel Raheem, S.E. and Hayashikawa, T. (2013), "Soil-structure interaction modeling effects on seismic response of cable-stayed bridge tower", Int. J. Adv. Struct. Eng., 5(8), 1-17. https://doi.org/10.1186/2008-6695-5-8.
  5. Abdel Raheem, S.E., Abdel Aal, E., Abdel Shafy, A.G., Fahmy, M.F.M. and Mansour, M.H. (2020), "Pile-soil-structure interaction effect on structural response of piled jacketsupported offshore platform through in-place analysis", Earthq. Struct., 18(4), 407-421. https://doi.org/10.12989/eas.2020.18.4.407.
  6. Abdel Raheem, S.E., Abdel Aal, S., Abdel Shafy, A.G. and Abdel Seed, F. (2012), "Nonlinear analysis of offshore structures under wave loadings", 15th World Conference on Earthquake Engineering, 15WCEE, Lisbon, Portugal. 24-28 September.
  7. API (American Petroleum Institute) (2005), API-RP2A - Recommended Practice for Planning, Designing, and Constructing Fixed Offshore Platforms - Working Stress Design.
  8. Asgarian, B. and Agheshlui, H. (2009), "Reliability-based earthquake design of jacket-type offshore platforms considering pile-soil-structure interaction", Amer. J. Appl. Sci., 6(4), 631-637. https://doi.org/10.3844/ajassp.2009.631.637.
  9. Asgarian, B., Zarrin, M. and Sabzeghabaian, M. (2019), "Effect of foundation behaviour on steel jacket offshore platform failure modes under wave loading", Ships Offshore Struct., 14(6), 570-581. https://doi.org/10.1080/17445302.2018.1526862.
  10. Badawy, A. and Abdel-Fattah, A.K. (2006), "2001 August earthquake swarm at Shadwan Island, Gulf of Suez, Egypt", Geophys. J. Int., 67(1), 288-296. https://doi.org/10.1111/j.1365-246X.2006.03094.x.
  11. Barone, G., LoIacono, F., Navarra, G. and Palmeri, A. (2015), "A novel analytical model of power spectral density function coherent with earthquake response spectra", 1st ECCOMAS Thematic Conference on Uncertainty Quantification in Computational Sciences and Engineering, Greece.
  12. Bea, R.G. (1999), "Reliability based earthquake design guidelines for marine structures", J. Waterway Port Coastal Ocean Eng., 125(5), 219-231. https://doi.org/10.1061/(ASCE)0733- 950X(1999)125:5(219).
  13. Bea, R.G., Akky, M.R. and Audibert, J.M.E. (1979), "Earthquake response of offshore platforms", ASCE J. Struct. Div., 105, 377-400. https://doi.org/10.1061/JSDEAG.0005099
  14. Clough, R.W. and Penzien, J. (1993), Dynamics of Structures, McGraw-Hill Inc.
  15. Dahy, S.A. (2012), "Seismic active zones and mechanism of earthquakes in northern Egypt", Europ. J. Appl. Sci., 4(2), 65-71.
  16. Dawson, T.H. (1983), Offshore Structural Engineering, Prentice-Hall, Englewood Cliffs.
  17. Han, X., Qiao, W. and Zhou, B. (2019), "Frequency domain response of jacket platforms under random wave loads", J. Marine Sci. Eng., 7, 328. https://doi.org/10.3390/jmse7100328.
  18. Jia, J. (2017), Offshore Structures Versus Land-Based Structures, Modern Earthquake Engineering, Springer, Berlin, Heidelberg.
  19. Kaiser, M.F., Aziz, A.M. and Ghieth, B.M. (2013), "Use of remote sensing techniques and aeromagnetic data to study episodic oil seep discharges along the Gulf of Suez in Egypt", Marine Pollution Bulletin, 72(1), 80-86. https://doi.org/10.1016/j.marpolbul.2013.04.024.
  20. Karunakaran, D., Baerheim, M. and Leira, B.J. (1997), "Measured and simulated dynamic response of a jacket platform", 16th Offshore Mech. Arctic Eng. Conference II, Yokohama, Japan, 13-17 April, 157-164.
  21. Konstandakopoulou, F.D., Evangelinos, K.I., Nikolaou, I.E., Papagiannopoulos, G.A. and Pnevmatikos, N.G. (2020), "Seismic analysis of offshore platforms subjected to pulse-type ground motions compatible with European Standards. Soil Dynamics and Earthquake Engineering 129, 105713. https://doi.org/10.1016/j.soildyn.2019.105713
  22. Li, Q.S., Zhang, Y.H., Wu, J.R. and Lin, J.H. (2004), "Seismic Random Vibration Analysis of Tall Buildings", J. Eng. Struct., 26, 1767-1778. https://doi.org/10.1016/j.engstruct.2004.06.013.
  23. Lin, Y.K. (1967), Probabilistic Theory of Structural Dynamics, McGraw-Hill, New York.
  24. Lutes, L.D. and Sarkani, S. (2004), Random Vibrations Analysis of Structural and Mechanical Systems, Elsevier Butterworth-Heinemann.
  25. Mao, D., Zhong, C., Zhang, L. and Chu, G. (2015), "Dynamic response of offshore jacket platform including foundation degradation under cyclic loadings", Ocean Eng., 100, 35-45. https://doi.org/10.1016/j.oceaneng.2015.03.012.
  26. Memarpour, M.M, Kimiaei, M, Shayanfar, M. and Khanzadi, M. (2012), "Cyclic lateral response of pile foundations in offshore platforms", Comput. Geotech., 42, 180-192. https://doi.org/10.1016/j.compgeo.2011.12.007.
  27. Mohamed, A.E.A., El-Hadidy, M., Deif, A. and Abou Elenean, K. (2012), "Seismic hazard studies in Egypt", NRIAG J. Astronomy Geophy., 1, 119-140. https://doi.org/10.1016/j.nrjag.2012.12.008.
  28. Mostafa, Y.E. and El Naggar, M.H. (2004), "Response of fixed offshore platforms to wave and current loading including soilstructure interaction", Soil Dyn. Earthq. Eng., 24, 357-368. https://doi.org/10.1016/j.soildyn.2003.11.008.
  29. Nadim, F. and Gudmestad, O.T. (1994), "Reliability of an engineering system under a strong earthquake with application to offshore platforms", Struct. Safety, 14(3), 203-217. https://doi.org/10.1016/0167-4730(94)90085-X.
  30. Naess, A. and Moan, T. (2012), Stochastic Dynamics of Marine Structures, Cambridge University Press, Cambridge
  31. Nour El-Din, M. and Kim, J. (2014), "Sensitivity analysis of pile-founded fixed steel jacket platforms subjected to seismic loads", Ocean Eng. 85, 1-11. https://doi.org/10.1016/j.oceaneng.2014.04.008.
  32. Patel, M.H. (1989), Dynamics of Offshore Structures, Butterworth, London.
  33. Pirizadeh, M. and Shakib, H. (2010), "Seismic response evaluation of setback frame buildings by random vibration analysis", 14th Symposium on Earthquake Engineering, Indian Institute of Technology, Paper No. A-0065.
  34. Raheem, S.E., Abdel Aal, E.M., AbdelShafy, A.G.A. and Fahmy, M.F.M. (2021), "Seismic response analysis of fixed jacket-type offshore structures based on power spectrum density Driven input", Ships Offshore Struct., https://doi.org/10.1080/17445302.2021.1884808.
  35. Raheem, S.E., Abdel Zaher, A.K. and Taha, A.M. (2018), "Finite element modeling assumptions impact on seismic response demands of MRF-buildings", Earthq. Eng. Eng. Vib., 17(4), 821-834. https://doi.org/10.1007/s11803-018-0478-1.
  36. Sharpe, R.L. and Newmark, N.M. (1977), "Extending seismic design provisions for buildings to the design of offshore structures", Offshore Technology Conference, Houston, Texas.
  37. Sun, Z.Z., Bi, C.W., Zhao S., Dong, G.H. and Yu, H.F. (2019), "Experimental analysis on dynamic responses of an electrical platform for an offshore wind farm under earthquake load", J. Marine Sci. Eng., 7(8), 279. https://doi.org/10.3390/jmse7080279.
  38. Zhou, B., Han, X. and Tan, S. (2017), "A simplified computational method for random seismic responses of a jacket platform", Ocean Eng., 82, 85-90. https://doi.org/10.1016/j.oceaneng.2014.02.013.