en Offshore Structure مقاله پژوهشي Research Paper <p>In the present research, data extracted from the stress analysis of 46 finite element models, verified using test results obtained from an experimental investigation, were used to study the effect of geometrical parameters on the chord-side stress concentration factors (SCFs) of central and outer braces in uniplanar tubular KT-joints of offshore structures subjected to four different types of in-plane bending (IPB) loads. Parametric study was followed by a set of the nonlinear regression analyses to develop SCF parametric equations for the fatigue analysis and design of uniplanar tubular KT-joints under IPB loadings.</p> Fatigue, Offshore jacket structure, Tubular KT-joint, Stress concentration factor (SCF), In-plane bending (IPB) 27 35 http://ijmt.ir/browse.php?a_code=A-10-296-4&slc_lang=en&sid=1 Hamid Ahmadi h-ahmadi@tabrizu.ac.ir 10031947532846002393 10031947532846002393 Yes University of Tabriz Ali Ziaei Nejad aliziaee89@gmail.com 10031947532846002394 10031947532846002394 No University of Tabriz