Cold‐Formed Steel Z‐Sections with Sloping Edge Stiffness Under Axial Load
Publication: Journal of Structural Engineering
Volume 116, Issue 2
Abstract
The 1986 edition of the American Iron and Steel Institute (AISI) specification adopted the unified approach for evaluating the postbuckling capacity of partially stiffened plate elements in cold‐formed sections. The criteria for design of sections with partially stiffened flanges, however, have been based mostly on research dealing with stiffeners located perpendicular to the flanges—a situation that is not representative of a large number of cross‐sections in use today. In the present paper, the AISI design criteria for cold‐formed sections with sloping edge stiffeners are reviewed and evaluated through comparison with experimental data obtained in a test program involving 46 Z‐sections loaded in direct compression. The Z‐sections varied in length from 18 in. (457 mm) to 96 in. (2,438 mm). An important parametric variation in these tests was the angle between the edge stiffeners and the flanges that varied from 0° to 80°. The results indicated good agreement between the ultimate capacity obtained through the current AISI specifications and the experimental results.
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References
1.
Desmond, T. P. (1978). “The behavior and strength of thin‐walled compression elements with longitudinal stiffeners.” Research Report No. 369, Dept. of Struct. Engrg., Cornell Univ., Ithaca, N.Y.
2.
Lau, S. C. W., and Hancock, G. Ts. (1987). “Distortional buckling formulas for channel columns.” J. Struct. Engrg. ASCE, 133(5), 1063–1078.
3.
Loughlan, J., and Rhodes, J. (1979). “The interactive buckling of lipped channel columns under concentric or eccentric loading.” Thin‐Walled Steel Structures, J. Rhodes and A. C. Walker, eds., Granada Publications Ltd., London, England, 40–50.
4.
Polyzois, D. (1985). “Effect of sloping edge stiffeners on the capacity of cold‐formed sections.” Proc. Annual Tech. Session of the Struct. Stability Res. Council, Structural Stability Research Council, Cleveland, Ohio, 151–162.
5.
Polyzois, D. (1981). “Flexural behaviour of braced girts and purlins,” thesis presented to the University of Toronto, in Toronto, Canada, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
6.
Specification for the design of cold‐formed steel structural members. (1980). American Iron and Steel Institute (AISI), Washington, D.C.
7.
Specification for the design of cold‐formed steel structural members. (1986). American Iron and Steel Institute (AISI), Washington, D.C.
8.
Sudharmapal, A. (1988). “Behavior of cold‐formed Z‐section members in compression,” thesis presented to The University of Texas at Austin, Texas, in partial fulfillment of the requirements for the degree of Master of Science.
9.
Winter, G. (1947). “Strength of thin steel compression flanges,” Bulletin No. 35, Part 3, School of Civ. Engrg., Cornell Univ., Ithaca, N.Y.
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Copyright © 1990 ASCE.
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Published online: Feb 1, 1990
Published in print: Feb 1990
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