Buckling approximations for laterally continuous elastic I-Beams

Dux, P. F. (Peter Francis) and Kitipornchai, S. (Sritawat) Buckling approximations for laterally continuous elastic I-Beams. St. Lucia: Dept. of Civil Engineering, University of Queensland, 1980.

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Author Dux, P. F. (Peter Francis)
Kitipornchai, S. (Sritawat)
Title Buckling approximations for laterally continuous elastic I-Beams
Place of Publication St. Lucia
Publisher Dept. of Civil Engineering, University of Queensland
Publication year 1980
Sub-type Other
Open Access Status File (Publisher version)
Series Research report (University of Queensland. Dept. of Civil Engineering) ; no.CE 11.
Language eng
Total number of pages 53
Year available 1980
Subjects 290800 Civil Engineering
Formatted Abstract/Summary



An approximate method for determining the elastic flexuraltorsional buckling loads of laterally continuous structures is developed. The method is a refinement of that proposed by Nethercot and Trahair and can be applied to structures loaded at braced points.   The braces and supports are assumed to prevent lateral deflection and twisting.   The procedure locates a critical segment and adjacent restraining segments which together form a substructure.   The elastic critical load is obtained by determining the effective length of the critical segment.   Charts of effective length factors, k, are presented and are shown to depend on the end restraint parameters, GA and GB, the segment beam parameter, K, and the end moment ratio, β.   The proposed method is applied to a number of worked examples. The results are in close agreement with accurate numerical solutions.    


The paper has been written with the design engineer in mind and does not presuppose a detailed knowledge of buckling theory.

Keyword Buckling (Mechanics)
Girders, Continuous
Q-Index Code AX
Q-Index Status Provisional Code
Institutional Status Unknown

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Created: Thu, 09 Aug 2012, 15:27:51 EST by Mr Lachlan Wong on behalf of The University of Queensland Library