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Prediction of stress concentrations and degrees of bending in axially loaded tubular K-joints

Prediction of stress concentrations and degrees of bending in axially loaded tubular K-joints
Prediction of stress concentrations and degrees of bending in axially loaded tubular K-joints
An extensive database of stress concentrations and degree of bending in tubular K-joints under balanced axial loading, generated recently in a finite element parametric study, has been used to develop parametric equations. The study covers a comprehensive range of geometric joint parameters which are commonly found in offshore structures. This database of thin shell finite element results was used to develop parametric equations for estimating stress concentration factors and the degree of bending at key locations on both the chord and brace. Formulae for the stress distributions around the intersection of K-joints were also derived using the parametric equations at key locations as input parameters, thus allowing the stress distributions to be predicted from the geometric joint parameters. Fracture mechanics fatigue calculations were performed to demonstrate that the information provided from the proposed equations could be used to obtain safe estimates of fatigue lives of tubular K-joints.
0143-974X
67-97
Morgan, M.R.
2b333082-6d38-49a4-ad86-ae3ebc8d55a5
Lee, M.M.K.
b0eec6ec-1557-494d-bbc5-4cd053cfbe46
Morgan, M.R.
2b333082-6d38-49a4-ad86-ae3ebc8d55a5
Lee, M.M.K.
b0eec6ec-1557-494d-bbc5-4cd053cfbe46

Morgan, M.R. and Lee, M.M.K. (1998) Prediction of stress concentrations and degrees of bending in axially loaded tubular K-joints. Journal of Constructional Steel Research, 45 (1), 67-97. (doi:10.1016/S0143-974X(97)00059-X).

Record type: Article

Abstract

An extensive database of stress concentrations and degree of bending in tubular K-joints under balanced axial loading, generated recently in a finite element parametric study, has been used to develop parametric equations. The study covers a comprehensive range of geometric joint parameters which are commonly found in offshore structures. This database of thin shell finite element results was used to develop parametric equations for estimating stress concentration factors and the degree of bending at key locations on both the chord and brace. Formulae for the stress distributions around the intersection of K-joints were also derived using the parametric equations at key locations as input parameters, thus allowing the stress distributions to be predicted from the geometric joint parameters. Fracture mechanics fatigue calculations were performed to demonstrate that the information provided from the proposed equations could be used to obtain safe estimates of fatigue lives of tubular K-joints.

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Published date: January 1998

Identifiers

Local EPrints ID: 75375
URI: https://eprints.soton.ac.uk/id/eprint/75375
ISSN: 0143-974X
PURE UUID: 11be1c3d-cdc9-4b40-8058-d75dc037cba1

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Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:43

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