American Society of Civil Engineers


Buckling Experiments on Hollow Flange Beams with Web Stiffeners


by Mahen Mahendran, (Assoc. Prof., School of Civ. Engrg., Queensland Univ. of Technol., Brisbane Q 4000, Australia) and Philip Avery, (Ph.D. Researcher Scholar, School of Civ. Engrg., Queensland Univ. of Technol., Brisbane Q 4000, Australia)

Journal of Structural Engineering, Vol. 123, No. 9, September 1997, pp. 1130-1134, (doi:  http://dx.doi.org/10.1061/(ASCE)0733-9445(1997)123:9(1130))

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Document type: Journal Paper
Abstract: The hollow flange beam (HFB) is a new cold-formed and resistance-welded section developed in Australia. Due to its unique geometry comprising two stiff triangular flanges and a slender web, the HFB is susceptible to a lateral-distortional buckling mode of failure involving web distortion. Investigation using finite-element analyses showed that the use of transverse web plate stiffeners effectively eliminated lateral-distortional buckling of HFBs and thus any associated reduction in flexural capacity. A detailed experimental investigation was then carried out to validate the results from the finite-element analysis and to improve the stiffener configuration further. This led to the development of a special stiffener that is screw-fastened to the flanges on alternate sides of the web. This paper presents the details of the experimental investigation, the results, and the final stiffener arrangement whereas the details of the finite-element analyses are presented in a companion paper.


ASCE Subject Headings:
Buckling
Experimentation
Flanges
Stiffening
Webs (structural)