Tests and Design of Aluminum Tubular Sections Subjected to Concentrated Bearing Load
Publication: Journal of Structural Engineering
Volume 135, Issue 7
Abstract
This paper presents a series of tests on high strength aluminum square hollow sections subjected to concentrated bearing load. A total of 64 web-bearing tests was conducted. The test specimens were fabricated by extrusion using 6061-T6 heat-treated aluminum alloy. The tests were carried out under end and interior loading conditions, where the specimens were seated on a fixed solid steel base plate. These tests closely simulated the support condition of the floor joist members seated on solid foundation. The test results were compared with the design strengths obtained using the American Aluminum Design Manual and European code for aluminum structures. It was shown that the design strengths predicted by these codes are either quite conservative or unconservative. Furthermore, the Australian Standard AS4100 and British Standard BS5950 Part 1 were used for aluminum square hollow section with sharp corners. The design rules of steel codes were modified to predict the web-bearing strength based on this study. It was shown that the design strengths calculated using the modified web-bearing design rules are generally conservative and agree well with the experimental results. Furthermore, the critical values of web slenderness were proposed beyond which web buckling governs.
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Acknowledgments
The writers gratefully acknowledge the Asia Aluminum Manufacturing Company for supplying the test specimens. They are also grateful to Mr. Chun-Wai Chan for his assistance in the experimental program as part of his final year undergraduate research project at The University of Hong Kong.
References
Aluminum Association (AA). (2005). Aluminum design manual, Washington, D.C.
Australian/New Zealand Standard (AS/NZS). (1997). “Aluminium structures—Part 1: Limit state design.” AS/NZS 1664.1:1997, Standards Australia, Sydney, Australia.
ASTM. (1997). “Standard test methods for tension testing of metallic materials.” E 8M-97, West Conshohocken, Pa.
Beshara, B. (1999). “Web crippling of cold-formed steel members.” MSc thesis, Univ. of Waterloo, Waterloo, Canada.
Bhakta, B. H., LaBoube, R. A., and Yu, W. W. (1992). “The effect of flange restraint on web crippling strength.” Civil Engineering Study 92-1, Cold-Formed Steel Series, Final Rep., Univ. of Missouri-Rolla, Rolla, Mo.
British Standards Institution (BSI). (2000). “Structural use of steelwork in building.” BS 5950, Part 1, London.
Cain, D. E., LaBoube, R. A., and Yu, W. W. (1995). “The effect of flange restraint on web crippling strength of cold formed steel Z-and I-sections.” Civil Engineering Study 95-2, Final Rep., Univ. of Missouri-Rolla, Rolla, Mo.
European Committee for Standardization (CEN). (2007). “Design of aluminum structures—Part 1.1: General structural rules.” Eurocode 9, Brussels, Belgium.
Gerges, R. R. (1997). “Web crippling of single web cold formed steel members subjected to end one-flange loading.” MSc thesis, Univ. of Waterloo, Waterloo, Ont., Canada.
Gerges, R. R., and Schuster, R. M. (1998). “Web crippling of single web cold formed steel members subjected to end one-flange loading.” Proc., 4th Int. Specialty Conf. on Cold-Formed Steel Structures, St. Louis.
Hetrakul, N., and Yu, W. W. (1978). “Structural behaviour of beam webs subjected to web crippling and a combination of web crippling and bending.” Civil Engineering Study 78-4, Final Rep., Univ. of Missouri-Rolla, Rolla, Mo.
Langan, J. E., Yu, W. W., and LaBoube, R. A. (1994). “Structural behaviour of perforated web elements of cold-formed steel flexural members subjected to web crippling and a combination of web crippling and bending.” Civil Engineering Study 94-3, Cold-Formed Steel Series, Rep., Univ. of Missouri-Rolla, Rolla, Mo.
Santaputra, C. (1986). “Web crippling of high strength of cold-formed steel beams.” Ph.D. thesis, Univ. of Missouri-Rolla, Rolla, Mo.
Standards Association of Australia. (1991). “Methods for tensile testing of metals.” AS 1391:1991, Standards Australia, Sydney, Australia.
Standards Association of Australia. (1998). “Steel structures.” AS 4100:1998, Standards Australia, Sydney, Australia.
Steel Construction Institute. (1997). Steelwork design guide to BS5950-1: 1990, Vol. 1. Section properties, members capacities, 5th Ed., Section A explanatory notes, SCI publication P-202, Silwood Park, Berkshire.
Tryland, B. T., Langseth, M., and Hopperstad, O. S. (1999). “Nonperfect aluminum beams subjected to concentrated loading.” J. Struct. Eng., 125(8), 900–909.
Wing, B. A., and Schuster, R. M. (1982). “Web crippling for decks subjected to two flange loading.” Proc., 6th Int. Specialty Conf. on Cold-Formed Steel Structures, Univ. of Missouri-Rolla Press, Rolla, Mo.
Winter, G., and Pian, R. H. J. (1946). “Crushing strength of thin steel webs.” Engineering Experiment Station, Bulletin No. 35, Cornell Univ., Ithaca, N.Y.
Wu, S., Yu, W. W., and LaBoube, R. A. (1997). “Strength of flexural members using structural grade 80 of A653 steel (web crippling tests).” Civil Engineering Study 97-3, Cold-Formed Steel Series, Draft, Univ. of Missouri-Rolla, Rolla, Mo.
Young, B., and Hancock, G. J. (2001). “Design of cold-formed channels subjected to web crippling.” J. Struct. Eng., 127(10), 1137–1144.
Young, B., and Hancock, G. J. (2003). “Cold-formed steel channels subjected to concentrated bearing load.” J. Struct. Eng., 129(8), 1003–1010.
Yu, W. W. (1981). “Web crippling and combined web crippling and bending of steel decks.” Civil engineering study 81-2, structural series, Univ. of Missouri-Rolla, Rolla, Mo.
Zetlin, L. (1955). “Elastic instability of flat plates subjected to partial edge loads.” J. Struct. Div., 81, 1–24.
Zhao, X. L., and Hancock, G. J. (1992). “Square and rectangular hollow sections subject to combined actions.” J. Struct. Eng., 118(3), 648–668.
Zhao, X. L., and Hancock, G. J. (1995). “Square and rectangular hollow sections under transverse end-bearing force.” J. Struct. Eng., 121(9), 1323–1329.
Zhao, X. L., Wilkinson, T., and Hancock, G. J. (2005). Cold-formed tubular members and connections, Elsevier, Oxford, U.K.
Zhou, F., and Young, B. (2008). “Aluminum tubular sections subjected to web crippling—Part I: Tests and finite element analysis.” Thin-Walled Struct., 46(4), 339–351.
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© 2009 ASCE.
History
Received: Dec 13, 2007
Accepted: Jan 13, 2009
Published online: Jun 15, 2009
Published in print: Jul 2009
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