Fatigue life estimation of the weld joint in K-node of the offshore jacket structure using stochastic finite element analysis

Several methods for finite element modelling and analysis of tubular welded joints are described in various design codes. These codes provide specific recommendations the joints, using simple weld geometries. In this paper, experimental strain range results from two full-scale semi-automatically K-nodes tests compared to corresponding models. Three dimensional (3D) scans surfaces have been developed automatically K-joints. 3D included (FE) models determine accuracy FE Some discrepancies observed between predictions test results. Finite model updating has applied improve The a with geometry based on common offshore without any modelled weld. show that scanned welds more accurate than other precise location toe is difficult locate model, thus stochastic performed analyse probabilistic hot-spot stresses. large variations It can be concluded it necessary evaluate nature stresses calculating fatigue lives structures.