Stress Analysis of a Member of Jacket Structure with Different Types of Stiffeners

Abstract

Jacket structures are subjected to very challenging environmental conditions and thus require certain reinforcements to ensure the resistance against the challenging conditions. The present study deals with the stress analysis of a member of a jacket structure with triangular type stiffener and another with second order curved stiffener. The specimen considered is of steel with dimensions 800 mm × 100 mm × 10 mm. The member is considered as a fixed bar subjected to a concentrated load of 500 N at the mid-span. The idea is to reinforce the member to strengthen up which in turn increases the life of the structure. The configuration of the stiffeners is such that the stress concentration is avoided. The triangular stiffener has a length of 200 mm and height of 20 mm and thickness of 10 mm. The second order curved stiffener has the same length, height and thickness and follows the variation y=20-x5+x22000. Four stiffeners are provided, one at the top and one at the bottom of each end. The structure is simulated and analyzed in a Finite Element Modelling (FEM) software and the necessary results are obtained. The results from this analysis are validated using the experimental results. © 2024, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.