Scientia Iranica

Scientia Iranica

Seismic performance evaluation of jacket-type offshore platforms using endurance time method considering soil-pile-superstructure interaction

Document Type : Research Article

Authors
H. Hasani 1
A.A. Golafshani 1
H.E. Estekanchi 2
1 Department of Civil and Environmental Engineering, Sharif University of Technology (SUT), Tehran, P.O. Box 11155-1639, Iran
2 Department of Civil and Environmental Engineering, Sharif University of Technology (SUT), Tehran, P.O. Box 11155-1639, Iran.
10.24200/sci.2017.4275
Abstract
In this paper, application of Endurance Time (ET) method in nonlinear seismic analysis of off shore pile supported systems has been studied. The ET method is a time-history analysis in which structures are subjected to intensifying arti cial acceleration functions. The ET method reduces complexity and computational demand of conventional nonlinear seismic analysis, and it provides response at di erent seismic levels in a single ET analysis. The aforementioned methodology has been applied to a typical model of single pile
and then to a functional jacket o shore platform in Persian Gulf region. Seismic response of aforesaid models by ET method has been compared with conventional time-history method. The results indicate that ET method is reliable in capturing seismic response of off shore platforms supported on piles with an acceptable accuracy.
Keywords
Endurance Time method
Soil-pile superstructure interaction
Single pile
Jacket offshore platform
Seismic assessment
Subjects
Scientia Iranica
Volume 24, Issue 4
Transactions on Civil Engineering (A)
July and August 2017
Pages 1843-1854

  • Receive Date 10 November 2015
  • Revise Date 23 August 2017
  • Accept Date 02 August 2016