Session Start Date

10-19-2000

Abstract

In the actual design codes the interaction formula for local and overall buckling modes of thin-walled steel compression (TWSC) members, the effect of local buckling. is introduced by means of effective strength of short members. This paper proposes to replace, into the Ayrton-Perry interaction formula, the short member "effective" strength, which is based on the "effective width" approach by the plastic strength evaluated by means of local plastic mechanism analysis. There are some papers by Murray et al. [1,2,3], in which the plastic mechanisms corresponding to the local buckling of plates and TWSC members in compression are analysed. On this basis, the local·overall interactive buckling modes can be regarded as interaction between local rigid-plastic mode and overall-elastic one, but until now it was difficult to couple these two modes into an adequate interactive equation. The paper shows the use of proposed "plastic-elastic" approach for the analysis of some series of plain and lipped channel specimens in compression. Comparisons with test and EUROCODE 3 results are presented.

Department(s)

Civil, Architectural and Environmental Engineering

Research Center/Lab(s)

Wei-Wen Yu Center for Cold-Formed Steel Structures

Meeting Name

15th International Specialty Conference on Cold-Formed Steel Structures

Publisher

University of Missouri--Rolla

Publication Date

10-19-2000

Document Version

Final Version

Rights

© 2000 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Oct 19th, 12:00 AM

Elastic-plastic Interactive Buckling of Thin-walled Steel Compression Members

In the actual design codes the interaction formula for local and overall buckling modes of thin-walled steel compression (TWSC) members, the effect of local buckling. is introduced by means of effective strength of short members. This paper proposes to replace, into the Ayrton-Perry interaction formula, the short member "effective" strength, which is based on the "effective width" approach by the plastic strength evaluated by means of local plastic mechanism analysis. There are some papers by Murray et al. [1,2,3], in which the plastic mechanisms corresponding to the local buckling of plates and TWSC members in compression are analysed. On this basis, the local·overall interactive buckling modes can be regarded as interaction between local rigid-plastic mode and overall-elastic one, but until now it was difficult to couple these two modes into an adequate interactive equation. The paper shows the use of proposed "plastic-elastic" approach for the analysis of some series of plain and lipped channel specimens in compression. Comparisons with test and EUROCODE 3 results are presented.