Composite Beams: Redistribution, Reliability, and Lateral Buckling

by Roger P. Johnson, Univ of Warwick, Coventry, United Kingdom,

Document Type: Proceeding Paper

Part of: Composite Construction in Steel and Concrete II


Research relevant to three aspects of the design of composite beams for ultimate limit states is summarized. These are: the redistribution in continuous beams and in framed structures of the longitudinal moments given by elastic global analysis; the statistical determination of partial safety factors γM for steel, concrete, and reinforcement, based on test data; and the use of the concrete slab as the horizontal member of inverted-U frames, both continuous and discrete, that can prevent distortional lateral buckling of steel bottom flanges in hogging moment regions of continuous beams. The conclusions are related to the relevant provisions of Eurocode 4, `Design of composite steel and concrete structures'.

Subject Headings: Composite beams | Buckling | Continuous beams | Steel structures | Concrete frames | Structural safety | Steel frames | Reinforced concrete

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