Parametric Study of Strength of Tubular Multiplanar KK-Joints
Publication: Journal of Structural Engineering
Volume 122, Issue 8
Abstract
A parametric study of the static strength of circular hollow-section joints with the multiplanar KK configuration, commonly found in both onshore and offshore structures, is presented. The study, carried out using a well-calibrated and validated finite-element model, investigated the effects of the various geometric parameters on static strength. Particular attention was given to joints with γ ratios, where the amount of experimental data is scarce, to the effect of γ on strength, and to the influence of the two major failure modes. In all, a total of 50 joints were analyzed. The study has established a clear demarcation boundary between the two failure types as a function of the transverse gap between the braces. A strength database—compiled from the finite-element data generated and 37 existing test results—was used to formulate strength equations through multiple regression analyses. The equations were found to provide strength predictions to a very high degree of accuracy.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
ABAQUS user manual. (1991). Hibbit, Karlsson and Sorensen, Inc., Providence, R.I., Version 4.9.
2.
ANSYS user manual. (1989). Swanson Analysis Systems, Inc., Houston, Pa., Version 4.4.
3.
AWS D1.1-90; Structural welding code . (1985). Am. Welding Soc., Miami, Fla.
4.
Kurobane, Y. (1993). “Assessment of double K-joint tests reported by Mounty and Rondal.”IIW Doc. XV-E-93-194, Int. Inst. of Welding, Cambridge, U.K.
5.
Kurobane, Y., Makino, Y., and Ochi, K.(1984). “Ultimate resistance of unstiffened tubular joints.”J. Struct. Engrg., ASCE, 110, 385–400.
6.
Lalani, M., and Bolt, H. M. (1990). “Strength of multiplanar joints on offshore platforms.”Proc., Int. Symp. on Tubular Struct., 90–102.
7.
Lee, M. M. K., and Wilmshurst, S. R.(1995). “Numerical modelling of CHS joints with multiplanar double-K configuration.”J. Constr. Steel Res., 32, 281–301.
8.
Makino, Y., Kurobane, Y., and Ochi, K. (1984). “Ultimate capacity of tubular double K-joints.”Proc., 2nd Int. Inst. of Welding Conf. on Welding of Tubular Struct., Pergamon Press, Tarrytown, N.Y., 451–458.
9.
Makino, Y., Kurobane, Y., and Paul, J. C. (1993). “Ultimate behaviour of diaphragm-stiffened tubular KK-joints.”Proc., Int. Symp. on Tubular Struct., 465–472.
10.
Mitri, H. S., Scola, S., and Redwood, R. G. (1987). “Experimental investigation into the behaviour of axially loaded tubular V-joints.”Proc., CSCE Centennial Conf., Can. Soc. for Civ. Engrg., Montreal, Canada, 397–410.
11.
Mouty, J., and Rondal, J. (1990). “Etude du comportement sous charge statique des assemblages soudes de profils creux circulaires dans les poutres de sections triangulaires et quadrangulaires.”Res. Rep., Univ. of Liège, Liège, Belgium.
12.
Nakacho, K., Okada, M., and Ueda, Y. (1989). “Stiffness and yield strength of simple V-joints of offshore structures.”J. Japanese Naval Inst. (in Japanese).
13.
Paul, J. C. (1992). “The ultimate behaviour of multiplanar TTand KK-joints made of circular hollow sections,” PhD thesis, Kumanmoto Univ., Kumanmoto, Japan.
14.
Paul, J. C., Ueno, T., Makino, Y., and Kurobane, Y. (1992). “Ultimate behaviour of multiplanar double K-joints.”Proc., Int. Offshore and Polar Engrg. Conf., 377–383.
15.
Paul, J. C., Makino, Y., and Kurobane, Y.(1993a). “Ultimate resistance of tubular double T-joints under axial brace loading.”J. Constr. Steel Res., 24, 205–228.
16.
Paul, J. C., Makino, Y., and Kurobane, Y. (1993b). “New ultimate capacity formulae for multiplanar joints.”Proc., Int. Symp. on Tubular Struct., 395–406.
17.
Paul, J. C., van der Valk, C. A. C., and Wardenier, J. (1989). “The static strength of multiplanar X-joints.”Proc., Int. Symp. on Tubular Struct., 73–80.
18.
Scola, S., Redwood, R. G., and Mitri, H. S.(1990). “Behaviour of axially loaded tubular V-joints.”J. Constr. Steel Res., 16, 89–109.
19.
van den Broek, T. J., Puthli, R. S., and Wardenier, J. (1990). “The influence of multiplanar loading on the strength and stiffness of tubular joints.”CIDECT Rep. 5AR-90/10, CIDECT, Delft Univ., Delft, the Netherlands.
20.
van der Vegte, G. J., van der Koning, C. H. M., Puthli, R. S., and Wardenier, J.(1991). “Numerical simulation of experiments on multiplanar tubular steel X-joints.”Int. J. of Offshore and Polar Engrg., 1, 200–207.
21.
Wilmshurst, S. R., and Lee, M. M. K. (1993). “Finite element analysis of KK-joints—an assessment of the test data of Mounty & Rondal.”IIW Doc. XV-E-93-190, Int. Inst. of Welding, Cambridge, U.K.
Information & Authors
Information
Published In
Copyright
Copyright © 1996 American Society of Civil Engineers.
History
Published online: Aug 1, 1996
Published in print: Aug 1996
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.