Numerical Analysis of Tubular XT Joint of Jacket Type Offshore Structures under Static Loading

Author: Md. Jobayer Mia, Md. Abidul Islam, Asif Kabir, Mehran Islam
DOI: doi.org/10.70279/bmj-v6-i1-1057
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Jacket structures are made of welded tubular space frames supported by a lateral bracing system. Tubular members are made up of structural steel. In an offshore structure, their primary job is to resist yield and buckling loads. They are also used to resist lateral loads. There are various types of tubular joints like T, K, KT, XT, etc. and each of the joints has significance, depending on the structure design and environment. These joints are subjected to various types of cyclic loading. As a result, fatigue failure occurs with the passing of time. In this study, the Finite Element Model of the XT-type tubular joint has been created and analysis has been done under static loading by using the STATIC STRUCTURAL analysis system of ANSYS 19.2 commercial software. The XT tubular model was analyzed under different load cases, and corresponding values for stress, strain, and deformation were tabulated. Using the maximum stress value, the yield point of the joint was also determined. The results highlighted that as the thickness of the joint increases, the values of maximum stress, strain, and deformation decrease. It was also observed that for tensile and compressive loading, the joint yielded at 30 KN of loading.