Self-Drilling Screw Joints for Cold-Formed Channel Portal Frames
Publication: Journal of Structural Engineering
Volume 130, Issue 11
Abstract
Cold-formed C channel sections have been used in portal frame construction for agricultural and light industrial sheds for many years in Australia. The knee joint designs have been copied from hot-rolled portal frames, regardless of the fact that many designers believe this is not realistic. Earlier testing conducted at the Univ. of South Australia demonstrated that these concerns were justified and that the joint designs widely used in practice do not match the moment capacity of the sections and fail prematurely. An alternative joint design has been developed using self-drilling screws. The joint demonstrates excellent moment capacity and rigidity, and is simple to design. A similar joint has also been examined for the ridge connections, which are at a lower angle than the knee joints. This paper describes the development and testing of the self-drilling screw joints, as well as summarizing testing of the conventional joints.
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References
1.
Daudet, R., and LaBoube, R.A. (1996). “Shear behaviour of self-drilling screws used in low ductility steel.” Proc., 13th Int. Conf. on Cold-formed Steel Structures, Univ. of Missouri-Rolla, St. Louis.
2.
Hogan, T.J., and Thomas, I.R. (1994). Design of structural connections, 4th Ed., Australian Institute of Steel Construction (AISC), Sydney, Australia.
3.
Mills, J.E. (2000). “Knee joints in cold-formed channel portal frames.” Proc., 15th Int. Conf. on Cold-formed Steel Structures, Univ. of Missouri-Rolla, St. Louis, Mo., 577–592.
4.
Mills, J.E., and Miller, J. (2001). “A new knee joint for cold-formed channel portal frames.” Proc., Australian Structural Engineering Conf., Gold Coast, Australia, 475–482.
5.
Standards Australia. (1996). “Cold-formed steel structures,” AS/NZS 4600, Sydney, Australia.
6.
Wheeler, A.T., Clarke, M.J., and Hancock, G.J. (1997). “Bending tests of bolted end plate connections in cold formed rectangular hollow sections.” Research Rep. No. R731, Dept. of Civil Engineering, Univ. of Sydney, Sydney, Australia.
7.
Wilkinson, T., and Hancock, G. J. (1998). “Tests of knee joints in cold-formed rectangular hollow sections.” Research Rep. No. R779, Dept. of Civil Engineering, Univ. of Sydney, Sydney, Australia.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 130 • Issue 11 • November 2004
Pages: 1799 - 1806
Copyright
Copyright © 2004 ASCE.
History
Published online: Oct 15, 2004
Published in print: Nov 2004
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