Stress Distribution along the Weld Toes of Tubular KT and KDT Joints under Balance Axial Loads and In-Plane-Bending Moments

Rudi Prastianto, Yoyok Hadiwidodo, Sofyan Widhestomo, Rizky Yazhahir

2018

Abstract

Jacket offshore structures are constructed from tubular members that consist of several types of multi-planar tubular joints. So far, very few investigations have been performed on stress characteristics of such joints due to their complexity. The present research is focused on the study of stress distribution along the weld toe of brace-chord intersection for most critical brace due to the joint loading. In this paper tubular-KT and KDT joints as elements of an offshore jacket platform are modelled as finite element models. The effect of multi-planarity caused by adding a brace to the stress distribution along the weld toes is investigated under two different loading conditions. To ensure validity of the model, Stress Concentration Factor (SCF) of the KT-joints model was validated by Efthymiou SCF equations. An additional brace has been added within the validated KT-joints models to form a multi-planar KDT joint, and the stress distribution along the weld toes of the joints are investigated under balance axial load and in-plane bending moments. The results showed that under balance axial loading, maximum stress occurred at a point of Crown 1 on the KDT-joints were smaller than maximum stress occurred in the KT-joints as well as the case of in-plane bending moment loading.

Paper Citation

in Harvard Style

Prastianto R., Hadiwidodo Y., Widhestomo S. and Yazhahir R. (2018). Stress Distribution along the Weld Toes of Tubular KT and KDT Joints under Balance Axial Loads and In-Plane-Bending Moments.In Proceedings of the 6th International Seminar on Ocean and Coastal Engineering, Environmental and Natural Disaster Management - Volume 1: ISOCEEN, ISBN 978-989-758-455-8, pages 170-175. DOI: 10.5220/0008650101700175

in Bibtex Style

@conference{isoceen18,
author={Rudi Prastianto and Yoyok Hadiwidodo and Sofyan Widhestomo and Rizky Yazhahir},
title={Stress Distribution along the Weld Toes of Tubular KT and KDT Joints under Balance Axial Loads and In-Plane-Bending Moments},
booktitle={Proceedings of the 6th International Seminar on Ocean and Coastal Engineering, Environmental and Natural Disaster Management - Volume 1: ISOCEEN,},
year={2018},
pages={170-175},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0008650101700175},
isbn={978-989-758-455-8},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 6th International Seminar on Ocean and Coastal Engineering, Environmental and Natural Disaster Management - Volume 1: ISOCEEN,
TI - Stress Distribution along the Weld Toes of Tubular KT and KDT Joints under Balance Axial Loads and In-Plane-Bending Moments
SN - 978-989-758-455-8
AU - Prastianto R.
AU - Hadiwidodo Y.
AU - Widhestomo S.
AU - Yazhahir R.
PY - 2018
SP - 170
EP - 175
DO - 10.5220/0008650101700175