Design equation for offshore overlap tubular K-joints under in-plane bending
Design equation for offshore overlap tubular K-joints under in-plane bending
Overlap tubular K-joints are generally regarded as having higher axial strength than similar simple gap K-joints due to their more direct load transfer between braces. Due to congestion at the nodes in steel jackets, overlap K-joints are used as key structural elements in many existing offshore platforms. However, relatively little experimental research has been done to quantify their strength and this has prevented engineers from taking full advantage of overlapping in the design of new structures as well as in the life extension assessment of existing platforms. This paper presents the results of a numerical study on gap and overlap K-joints under in-plane bending. The parametric study reveals new insight into how the behavior and strength varies across the practical range of geometrical parameters.
Based on the finite element strength database, a capacity equation has been derived and presented herein using nonlinear regression
analysis techniques.
finite element method, offshore structures, joints, bracing, bending.
1087-1095
Lee, M.K.
2a158b4e-0c01-4fd4-9cf8-99597fb3936a
Gazzola, F.
f93475cf-a23a-41c4-a75c-8dc6a897f9af
July 2006
Lee, M.K.
2a158b4e-0c01-4fd4-9cf8-99597fb3936a
Gazzola, F.
f93475cf-a23a-41c4-a75c-8dc6a897f9af
Abstract
Overlap tubular K-joints are generally regarded as having higher axial strength than similar simple gap K-joints due to their more direct load transfer between braces. Due to congestion at the nodes in steel jackets, overlap K-joints are used as key structural elements in many existing offshore platforms. However, relatively little experimental research has been done to quantify their strength and this has prevented engineers from taking full advantage of overlapping in the design of new structures as well as in the life extension assessment of existing platforms. This paper presents the results of a numerical study on gap and overlap K-joints under in-plane bending. The parametric study reveals new insight into how the behavior and strength varies across the practical range of geometrical parameters.
Based on the finite element strength database, a capacity equation has been derived and presented herein using nonlinear regression
analysis techniques.
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More information
Published date: July 2006
Keywords:
finite element method, offshore structures, joints, bracing, bending.
Identifiers
Local EPrints ID: 53761
URI: http://eprints.soton.ac.uk/id/eprint/53761
ISSN: 0733-9445
PURE UUID: 1d280bf3-ae87-49f9-9aa5-af2f13b158fa
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Date deposited: 22 Jul 2008
Last modified: 15 Mar 2024 10:42
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Author:
M.K. Lee
Author:
F. Gazzola
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