Seismic Hazard Assessment of Offshore Platforms
This paper examines the effects of pile-soil-structure interaction on the dynamic response of offshore platforms under the action of near-fault earthquakes. Two offshore platforms models are investigated, one with completely fixed supports and one with piles which are clamped into deformable layered soil. The soil deformability for the second model is simulated using non-linear springs. These platform models are subjected to near-fault seismic ground motions. The role of fault mechanism on platforms’ response is additionally investigated, while the study also examines the effects of different angles of incidence of seismic records on the maximum response of each platform.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.3298767Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 728
 Gates, W. E., Marshall E. and Mahin, S.A. (1977), Analytical methods for determining the ultimate earthquake resistance methods for fixed offshore structures, Τhe 9thAnnual Offshore Technology Conference, Houston, Texas.
 Kayvani, K. and Barzegar, F. (1996). Hysteretic modelling of tubular members and offshore platforms. Engineering Structures, 18(2), 93-101.
 Golafshani, A. A., Tabeshpour, M. R. and Komachi, Y. (2009). FEMA approaches in seismic assessment of jacket platforms (case study: Ressalat jacket of Persian Gulf). Journal of Constructional Steel Research, 65(10-11), 1979-1986.
 Asgarian, B. and Agheshlui, H. (2009). Reliability-based earthquake design of jacket-type offshore platforms considering pile-soil-structure interaction. American Journal of Applied Sciences, 6(4), 631.
 Peng, B. F., Chang, B., Leow, B. L. and Nandlal, S. (2008). Nonlinear Dynamic Soil-Pile-Structure-Interaction Analysis of Offshore Platform for Ductility Level Earthquake under Soil Liquefaction Conditions. In 14th World Conference on Earthquake Engineering”, Paper (No. 05-01, p. 0386).
 Asgarian, B. and Ajamy, A. (2010). Seismic performance of jacket type offshore platforms through incremental dynamic analysis. Journal of Offshore Mechanics and Arctic Engineering, 132(3), 031301.
 Bargi, K., Hosseini, S. R., Tadayon, M. H. and Sharifian, H. (2011). Seismic response of a typical fixed jacket-type offshore platform (SPD1) under sea waves. Open Journal of Marine Science, 1(2), 36.
 El-Din, M.N. and Kim, J. (2014). Sensitivity analysis of pile-founded fixed steel jacket platforms subjected to seismic loads. Ocean Engineering, 85, 1-11.
 FEMA – Federal Emergency Management Agency, NEHRP Recommended Seismic Provisions for New Buildings and Other Structures C. FEMA P-750. Edition, Washington, D.C;2009.
 Nizamani, Z. (2015). Environmental load factors and system strength evaluation of offshore jacket platforms, Vol. 4, Springer International Publishing, Switzerland.
 Carr AJ. (2008). RUAUMOKO – Inelastic Dynamic Analysis Program. Department of Civil Engineering, University of Canterbury, Christchurch, New Zealand.
 Paciﬁc Earthquake Engineering Research Center – PEER. Next Generation Attenuation West 2 database, 〈https://ngawest2.berkeley.edu/〉; 2018 (accessed 08.30.18).
 Minasidis, G., Hatzigeorgiou, G. D. and Beskos, D. E. (2014). SSI in steel frames subjected to near-fault earthquakes. Soil Dynamics and Earthquake Engineering, 66, 56-68.
 Boulanger, R. W., Curras, C. J., Kutter, B. L., Wilson, D. W., and Abghari, A. (1999). Seismic soil-pile-structure interaction experiments and analyses. Journal of Geotechnical and Geoenvironmental Engineering, 125(9), 750-759.
 Ajamy, A., Asgarian, B., Ventura, C. E., and Zolfaghari, M. R. (2018). Seismic fragility analysis of jacket type offshore platforms considering soil-pile-structure interaction. Engineering Structures, 174, 198-211.