American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
Experimental and Numerical Comparison of Flexural Capacity of Light Gage Cold Formed Steel Roof Deck
Alternative Title
Research Report RP20-6
Abstract
This paper presents an analysis of experimental data and compares it to two numerical analysis methods of light gage cold formed steel roof deck. The flexural capacity was determined upon the first failure mode of the light gage cold formed steel roof deck. A comparison of the experimental data was made to both the effective width method and the direct strength method. The objective of the comparison was to have a physical test provide the actual behavior of the light gage cold formed steel roof deck and grade how well the numerical analysis, effective width and direct strength methods, compare against the results. Material testing samples were taken from the steel roof deck and evaluated for the actual yield stress. This allowed for the most accurate comparison between the experimental results with the numerical analysis since the exact yield strength was used in calculation. It was found that the effective width method and the direct strength method vary in their prediction of the nominal moment capacity across material grades and deck thickness but tend to converge to a constant ratio, MnDSM /Mn EWM, at thicker deck gages. The effective width method was found to be more accurate for thinner gage steel roof deck, while the direct strength method was found to be more accurate for thicker gage steel roof deck. The effective width method is better at predicting the strength of steel roof deck, particularly the thinner gage ones, while the direct strength method provided a much quicker process to find the flexural capacity of the deck. Both methods can be used to determine the capacity of the deck and it is up to the end user to determine which method is appropriate for the given application.
Department(s)
Civil, Architectural and Environmental Engineering
Research Center/Lab(s)
Wei-Wen Yu Center for Cold-Formed Steel Structures
Publisher
American Iron and Steel Institute (AISI)
Publication Date
May 2020
Document Version
Final Version
Rights
© 2020 American Iron and Steel Institute, All rights reserved.
Document Type
Technical Report
File Type
text
Language
English
Technical Report Number
AISI RP20-6
Recommended Citation
Raeel, Christopher H. and Gwozdz, Dawid, "Experimental and Numerical Comparison of Flexural Capacity of Light Gage Cold Formed Steel Roof Deck" (2020). American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present). 221.
https://scholarsmine.mst.edu/ccfss-aisi-spec/221
Comments
The authors would like to thank American Iron and Steel Institute, Steel Deck Institute and National Roofing Contractors Association for their financial support.