Ductility of G550 Sheet Steels in Tension
Publication: Journal of Structural Engineering
Volume 123, Issue 12
Abstract
Cold formed structural members are fabricated from sheet steels which must meet various material requirements prescribed in applicable national design standards. These requirements ensure that (1) Stress concentrations can be redistributed; and (2) members and connections can undergo a minimum amount of displacement without a loss in structural performance. The 1996 Australian/New Zealand (AS/NZS 4600) and 1996 North American (CSA-S136 and AISI), Cold Formed Steel Design Standards allow for the use of thin (t< 0.9 mm), high strength (fy= 550 MPa) sheet steels if the yield stress and ultimate strength are reduced to 75% of their minimum specified values. This paper provides a summary of results detailing the ductility and net cross-section tensile resistance of G550 sheet steels (to the 1993 Australian Standard AS 1397), tested as solid and perforated coupons. Material properties of the test specimens are compared with the Dhalla and Winter requirements for ductility and ultimate strength to yield stress ratio. Limit states tensile design equations are calibrated according to procedures defined by the 1996 American Iron and Steel Institute (AISI) Commentary.
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References
1.
American Institute of Steel Construction (AISC). (1986). “Load and resistance factor design—manual of steel construction.” 1st Ed., Chicago, Il.
2.
American Iron and Steel Institute (AISI). (1996a). “Specification for the design of cold-formed steel structural members.” Draft Ed., Washington, D.C.
3.
American Iron and Steel Institute (AISI). (1996b). “Commentary on the 1996 edition of the specification for the design of cold-formed steel structural members.” Draft Ed., Washington, D.C.
4.
American Iron and Steel Institute (AISI). (1996c). “Changes to specification and commentary sections C2, E2, E3.2, E3.3 and E5, combined LRFD and ASD.” Ballot C/S96-66B, Washington, D.C.
5.
BHP. (1996). “0.42 G550 commonisation study.” BHP Steel Research, Flat Products Div., BHP Steel, Port Kembla, NSW, Australia.
6.
“Cold formed steel structural members.” (1994). S136, CSA, Etobicoke, Ontario, Canada.
7.
“Commentary on CSA standard S136-94, cold formed steel structural members.” (1995). S136.1, CSA, Etobicoke, Ontario, Canada.
8.
“Cold-formed steel structures.” (1996). AS/NZS 4600, SA/SNZ, Sydney, NSW, Australia.
9.
“Design of steel structures, part 1.3—general rules, supplementary rules for cold formed thin gauge members and sheeting.” (1996). Eurocode3, European Committee for Standardization, Brussels, Belgium.
10.
Dhalla, A. K., and Winter, G.(1974a). “Steel ductility measurements.”J. Struct. Div., ASCE, 100(2), 427–444.
11.
Dhalla, A. K., and Winter, G.(1974b). “Suggested steel ductility requirements.”J. Struct. Div., ASCE, 100(2), 445–462.
12.
Ellingwood, B., Galambos, T. V., MacGregor, J. G., and Cornell, C. A. (1980). “Development of a probability based load criterion for American National Standard A58: building code requirements for minimum design loads in buildings and other structures.” NBS Special Publication No. 577, National Bureau of Standards, Washington, D.C.
13.
“Guidelines for the development of limit states design.” (1981). S408, CSA, Etobicoke, Ontario, Canada.
14.
Hancock, G. J. (1994). “Design of cold-formed steel structures (to Australian Standard AS 1538–1988).” 2nd Ed., Australian Institute of Steel Construction, Sydney, NSW, Australia.
15.
Hancock, G. J., and Murray, T. M. (1996). “Residential applications of cold-formed structural members in Australia.”Proc. of the 13th Specialty Conf. on Cold-Formed Steel Structures, W. W. Yu and R. A. LaBoube, eds., Univ. of Missouri-Rolla, Rolla, Mo., 505–511.
16.
Oliver, D. A. (1928). “Proposed new criteria of ductility from a new law connecting the percentage elongation with size of test piece.” Inst. of Mech. Engrs., Proc. No. 4, 827–864.
17.
Ravindra, M. K., and Galambos, T. V.(1978). “Load and resistance factor design for steel.”J. Struct. Div., ASCE, 104(9), 1337–1353.
18.
Rogers, C. A., and Hancock, G. J. (1996). “Ductility of G550 sheet steels in tension—elongation measurements and perforated tests.”Res. Rep. No. R735, Dept. of Civ. Engrg., Univ. of Sydney, Sydney, NSW, Australia.
19.
“Standard specification for steel sheet, zinc-coated (galvanized) by the hot-dip process, structural (physical) quality.” (1968). A446, ASTM, Philadelphia, Pa.
20.
“Standard test methods and definitions for mechanical testing of steel products.” (1994a). A370, ASTM, Philadelphia, Pa.
21.
“Standard specification for steel, sheet, carbon, cold-rolled, structural quality.” (1994b). A611, ASTM, Philadelphia, Pa.
22.
“Standard specification for steel sheet, zinc-coated (galvanized) or zinc-iron alloy-coated (galvannealed) by the hot-dip process.” (1994c). A653, ASTM, Philadelphia, Pa.
23.
“Standard specification for steel sheet, 55% aluminum-zinc alloy-coated by the hot-dip process.” (1994d). A792, ASTM, Philadelphia, Pa.
24.
“Steel sheet and strip—hot-dipped zinc-coated or aluminum/zinc-coated.” (1993). AS 1397, SA, Sydney, NSW, Australia.
25.
Unwin, W. C. (1903). “Influence of gauge length and section of test bar on the percentage of elongation.”Engineering Standards Committee Report, Crosby Lockwood and Son, London, U.K.
26.
Van Vlack, L. H. (1984). Elements of materials science and engineering, 6th Ed., Addison-Wesley Publishers, Reading, Mass., 254–255.
27.
Wu, S., Yu, W. W., and LaBoube, R. A. (1995). “Strength of flexural members using structural grade 80 of A653 and grade E of A611 steels.”1st Progress Rep., Civ. Engrg., Study 95-5, Univ. of Missouri-Rolla, Rolla, Mo.
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Copyright © 1997 American Society of Civil Engineers.
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Published online: Dec 1, 1997
Published in print: Dec 1997
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