Session Dates
17 Oct 1996
Abstract
The paper describes a design procedure for stainless steel columns failing by flexural buckling. In the approach, the stress strain-curve is assumed to be expressed as a Ramberg-Osgood curve, defined in terms of the initial modulus (E₀), the 0.2% proof stress (σ₀.₂) and the parameter n. It is shown that the column curve can be described in terms of the Ramberg-Osgood parameters by adopting a Perry-curve as basic strength curve and expressing the imperfection paranleter in terms of E₀, σ₀.₂ and n. By using a Perry-curve, the design procedure is explicit. This contrasts the iterative approach described in the ASCE-LRFD Specification for the Design of Cold-formed Stainless Steel Structural Members. The proposed strength curves are compared with tests of stainless steel columns. It is shown that the coefficient of variation of the ratio of test strength to design strength is lower using the proposed design approach than using the ASCE Specification. Thus, the proposed approach is more accurate than that described in the ASCE Specification. Being explicit it is also more efficient. Using the comparison with test results, the resistance factor to be used with the proposed design procedure is derived.
Department(s)
Civil, Architectural and Environmental Engineering
Research Center/Lab(s)
Wei-Wen Yu Center for Cold-Formed Steel Structures
Meeting Name
13th International Specialty Conference on Cold-Formed Steel Structures
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 1996 University of Missouri--Rolla, All rights reserved.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Rondal, Jacques and Rasmussen, Kim J. R., "An Explicit Approach to Design of Stainless Steel Columns" (1996). CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018). 2.
https://scholarsmine.mst.edu/isccss/13iccfss/13iccfss-session9/2
An Explicit Approach to Design of Stainless Steel Columns
The paper describes a design procedure for stainless steel columns failing by flexural buckling. In the approach, the stress strain-curve is assumed to be expressed as a Ramberg-Osgood curve, defined in terms of the initial modulus (E₀), the 0.2% proof stress (σ₀.₂) and the parameter n. It is shown that the column curve can be described in terms of the Ramberg-Osgood parameters by adopting a Perry-curve as basic strength curve and expressing the imperfection paranleter in terms of E₀, σ₀.₂ and n. By using a Perry-curve, the design procedure is explicit. This contrasts the iterative approach described in the ASCE-LRFD Specification for the Design of Cold-formed Stainless Steel Structural Members. The proposed strength curves are compared with tests of stainless steel columns. It is shown that the coefficient of variation of the ratio of test strength to design strength is lower using the proposed design approach than using the ASCE Specification. Thus, the proposed approach is more accurate than that described in the ASCE Specification. Being explicit it is also more efficient. Using the comparison with test results, the resistance factor to be used with the proposed design procedure is derived.
