Fatigue Behavior of T-Joints: Square Chords and Circular Braces
Publication: Journal of Structural Engineering
Volume 124, Issue 4
Abstract
Hollow sections are generally either circular-to-circular (CCHS) or rectangular-to-rectangular (RRHS). Structures with circular braces and rectangular chords (CRHS) may have advantages in certain applications, combining a simple joint geometry for fabrication and relatively lower stress concentration factors (SCFs). Seven different CRHS joints were fatigue tested in constant amplitude axial loading. SCFs were measured experimentally and compared with various parametric formulas. The SCF values for CRHS joints were found to be between those of CCHS and RRHS joints. On the basis of measured SCF values for CRHS joints, the fatigue strength was in good agreement with current fatigue design codes. Parametric formulas for RRHS joints were in all cases found to give conservative prediction of SCF. Lacking more rational prediction methods, these formulas in combination with the DEn T curve/AWS X2 curves for tubular joints may be used in fatigue design of CRHS joints.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Almar-Naess, A. (1985). Fatigue handbook—offshore steel structures. Tapir Publishers, Trondheim, Norway.
2.
Berge, S. (1993a). “Fatigue design of tubular joints—developments and problems.”Fatigue under spectrum loading and in corrosive environments, A. F. Blom, ed., Technical University of Denmark, Lyngby, Denmark, 227–248
3.
Berge, S. (1993b). “Stress concentrations of hollow joints of square and circular sections.”Internal Proj. Rep., Dept. of Marine Struct., The Norwegian Institute of Technology, Trondheim, Norway.
4.
“Design of tubular joints for offshore structures.” (1985). UR33, Vols. I–III, UEG Publications, London, U.K.
5.
Gurney, T. R. (1982). “The basis of the revised fatigue design rules in the Department of Energy offshore guidance notes.”Proc., 2nd Int. Conf. on Offshore Welded Struct., The Welding Institute, Cambridge, U.K., P55.1–11.
6.
Gurney, T. R. (1991). The fatigue strength of transverse fillet welded joints. Abington Publishing, Cambridge, U.K.
7.
Offshore installations: guidance on design and construction and certification. (1990). 4th Ed., Department of Energy, Her Majesty's Stationery Office, London, U.K.
8.
Soh, A. K., and Soh, C. K. (1989). “SCF equations for T/Y and K square-to-round tubular joints.”J. Petroleum Technol., March, 289–296.
9.
Soh, A. K., and Soh, C. K.(1990). “A parametric stress analysis of T/Y and K square-to-square tubular joints.”J. Constructional Steel Res., 15(3), 173–190.
10.
“Structural welding code: steel.” (1992). ANSI/AWS D1.1-92, 13th Ed., American Welding Society, Miami, Fla.
11.
Wingerde, A. M. van (1992). “The fatigue behaviour of T and X joints made with square hollow sections.”HERON, TU Delft, TNO-IBBC, 37(2), Delft University of Technology, Delft, the Netherlands.
Information & Authors
Information
Published In
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Apr 1, 1998
Published in print: Apr 1998
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.