Optimal designs of I-beams against lateral buckling

Wang, Chien Ming, Kitipornchai, Sritawat and Thevendran, V. (1990) Optimal designs of I-beams against lateral buckling. Journal of Engineering Mechanics, 116 9: 1902-1923. doi:10.1061/(ASCE)0733-9399(1990)116:9(1902)

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Author Wang, Chien Ming
Kitipornchai, Sritawat
Thevendran, V.
Title Optimal designs of I-beams against lateral buckling
Journal name Journal of Engineering Mechanics   Check publisher's open access policy
ISSN 0733-9399
Publication date 1990-09-01
Sub-type Article (original research)
DOI 10.1061/(ASCE)0733-9399(1990)116:9(1902)
Open Access Status Not Open Access
Volume 116
Issue 9
Start page 1902
End page 1923
Total pages 22
Place of publication Reston, VA, United States
Publisher American Society of Civil Engineers
Language eng
Abstract This paper concerns the optimal distribution of a given volume of material in I-beams so as to maximize the elastic flexural-torsional buckling capacities. The material distribution has been restricted to different top-to-bottom flange-width ratios, linear tapering of flange width, or linear tapering of web depth. Based on the Rayleigh-Timoshenko energy method, a canonical form of the Rayleigh quotient is derived for the three types of design considered. For the maximum buckling capacity, the quotient is first minimized with respect to the displacement function and then maximized with respect to the design parameter. To avoid inelastic behavior and a small cross-sectional area in the optimal beam designs, a maximum permissible normal-stress constraint is imposed. Optimal designs of simply supported I-beams under general moment gradient are presented. A comparison study is made to determine which of the three design types is the most effective way of distributing material for maximum buckling capacities.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mechanical & Mining Engineering Publications
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Citation counts: TR Web of Science Citation Count  Cited 6 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 11 Jan 2017, 00:52:45 EST by Clare Nelson on behalf of School of Mechanical and Mining Engineering