Torsion and Bending of Braced Thin‐Walled Open Sections
Publication: Journal of Structural Engineering
Volume 116, Issue 1
Abstract
The paper describes a theoretical and experimental study of the flexural and torsional properties of braced, thin‐walled, open sections, such as elevator core shear walls with lintel beams across openings at each floor level. The theoretical model developed is based on an equivalent closed section, and it is consistent with established open‐section and closed‐section behavior at the two extremes of bracing. For intermediate bracing, the theoretical model incorporates the influences of bending and shear deformation of the bracing, continuous shear flow around the equivalent closed section, and out‐of‐plane bending of the side walls, which is analyzed approximately using plate theory. The theoretical model is validated, for the entire range of bracing stiffness, by comparison with a series of tests on perforated, extruded aluminum tubes. The influences of continuous shear flow around the equivalent closed section and out‐of‐plane bending of the side walls, which have not been considered previously, are shown to be very significant for particular sections.
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References
1.
Coull, A., and Irwin, A. W. (1971). “Torsion analysis of multistory shear wall structures.” SP 35‐6, Amer. Cone. Inst., Detroit, Mich., 211–238.
2.
Heidebrecht, C., and Stafford Smith, B. (1973). “Approximate analysis of open section shear walls subject to torsional loading.” J. Struct. Div., ASCE, 99(12), Dec., 2355–2373.
3.
Irwin, A. W., and Bolton, C. J. (1977). “Torsion of tall building cores.” Proc., Inst. of Civ. Engrs., Part 2, 63, Sept., 579–591.
4.
Khan, M. A. H., and Stafford Smith, B. (1975). “Restraining action of bracing in thin walled open section beams.” Proc., Inst. of Civ. Engrs., Part 2, 59, Mar., 67–78.
5.
Liauw, T. C. (1978). “Torsion of multi‐storey spatial core walls.” Proc., Institution of Civil Engineers, Part 2, 65, Sept., 601–609.
6.
Liauw, T. C., and Luk, W. K. (1980). “Torsion of core walls of nonuniform section.” J. Struct. Div., ASCE, 106(9), Sept., 1921–1931.
7.
Roberts, T. M. (1985). “Section properties of thin walled bars of open cross‐section.” The Struct. Engr., 63B(3), 63–67.
8.
Rosman, R. (1969). “Torsion of perforated concrete shafts.” J. Struct. Div., ASCE, 95(5), May, 991–1010.
9.
Ryder, G. H. (1965). Strength of materials, MacMillan and Co. Ltd., London, England.
10.
Stafford Smith, B., and Abate, A. (1984). “The effects of shear deformations on the shear centre of open section thin walled beams.” Proc., Inst. of Civ. Engrs., Part 2, 77, Mar., 57–66.
11.
Timoshenko, S., and Goodier, J. N. (1951). Theory of elasticity, McGraw‐Hill Book Company, Inc., Tokyo, Japan.
12.
Timoshenko, S., and Woinowsky‐Krieger, S. (1969). Theory of plates and shells, McGraw‐Hill Book Company, Inc., Tokyo, Japan.
13.
Timoshenko, S., and Gere, J. M. (1961). Theory of elastic stability, McGraw‐Hill Book Company, Inc., Tokyo, Japan.
14.
Vlasov, V. Z. (1961). Thin walled elastic beams. Israel Program for Scientific Translations, Jerusalem, Israel.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 116 • Issue 1 • January 1990
Pages: 1 - 12
Copyright
Copyright © 1990 ASCE.
History
Published online: Jan 1, 1990
Published in print: Jan 1990
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