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A Study of the Modification Factor(B) in the AISC Specification for Elastic Buckling of Web-Tapered Beams  

Ryu, Hyo-Jin (충남대학교 토목공학과)
Lim, Nam-Hyoung (충남대학교 토목공학과부)
Publication Information
Journal of the Korean Society of Hazard Mitigation / v.8, no.2, 2008 , pp. 45-49 More about this Journal
Abstract
This paper investigated the accuracy of the current design formulae for the elastic buckling strength of web-tapered I-beams in AISC-LRFD specification. The basic concept is to replace a tapered beam by an equivalent prismatic beam with a different length, but with a cross section identical to that of the smaller end of the tapered beam. The modification factor, B, is used to account for the stress gradient within the unbraced length and the lateral restraining effects offered by the adjacent segments. The modification factor(B) suggested in AISC-LRFD specification was compared with the finite element method(FEM) results. This paper presented a redefined method to calculate the modification factor(B).
Keywords
Web-tapered beam; Elastic buckling; Stress gradient; Restraining effect;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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