Alireza Mojtahedi - Ph.D student , Univrsity of Tabriz
Mohammad Ali Lotfollahi Yaghin - Associate Professor , Univrsity of Tabriz
Mirmohammad Ettefagh - Assistant professor, University of Tabriz
Alireza Naghashi - Msc student , Tabriz Universitt

Steel jacket-type platforms are by far the most common kind of offshore structures. The main criterion in the maintenance of these structures, as any other structures, is ensuring of thestructural safely performances during their design service life [1]. This research is an experimental investigation on a laboratory model of a jacket platform for developing a robust damage detection technique which is less sensitive to both measurement and analytical modeluncertainties. Fuzzy logic system (FLS) and probabilistic analysis is developed for global damage detection and Linguistic classification of damage

Offshore structure, Finite element model updating, Damage Detection