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Cold-Formed Z-Sections Under Axial Load and Bending

by Dimos Polyzois, Univ of Manitoba, Canada,



Document Type: Proceeding Paper

Part of: Building Code Requirements for Masonry Structures (ACI 530-88/ASCE 5-88) and Specifications for Masonry Structures (ACI 530.1-88/ASCE 6-88) (ACI 530.1-88/ASCE 6-88)

Abstract:

The use of cold-formed Z-section members as beam-columns presents some unique design problems which are not adequately addressed in the current design specifications. If these members are properly braced to prevent failure by lateral-torsional buckling, the AISI Specification criteria may be used for design purposes. Otherwise it is recommended that their capacity be determined on the basis of test results. An extensive theoretical and experimental program was conducted in order to develop design criteria for cold-formed Z-section members subjected to combined axial load and bending. The present paper deals with the evaluation of the results obtained from this research program.

Subject Headings: Axial loads | Steel structures | Steel frames | Steel beams | Load and resistance factor design | Cold-formed steel | Buckling

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