(2)A review of stress concentration factors in tubular and non-tubular joints for design of offshore installations

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Dikshant Singh Saini, Debasis Karmakar, Samit Ray-Chaudhuri

Department of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur, UP 208016, India

Received 17 January 2016; received in revised form 5 May 2016; accepted 13 June 2016
Available online 4 August 2016

Abstract
Tubular structures are widely used in offshore installations, trusses, high rise buildings, towers for wind turbines, ski-lift installations,lightning, road pole signals etc., owing to their excellent structural performance and attractive appearance. Stress concentration, especially in the welded joints of these structures, is an important design consideration particularly for fatigue design. In the context of tubular and non-tubular joints, this paper provides a review of the experimental and numerical studies that have been carried out so far to determine the stress concentration factor (SCF). Emphasis is also placed on the complexity of capturing different types of stresses in tubular/non-tubular joints for estimation of SCF. Present code provisions for evaluation of SCF are also discussed. Further, a few issues, which require significant research effort to advance our understanding and to improve the current design guidelines, have been identified.
© 2016 Shanghai Jiaotong University. Published by Elsevier B.V.
This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ).

Keywords: Hot-spot stress; Stress concentration factor (SCF); Fatigue; Tubular joints; Non-tubular joints.