Session Dates
07 Nov 2018 - 08 Nov 2018
Abstract
Cold-formed steel cross sections are high strength thin-walled profiles which are highly prone to local and distortional instabilities. Stiffening techniques are utilized in the industry as a solution to enhance local and distortional buckling strengths. The sigma section is that channel section which its web pushed inward for the stiffening reason. In this research, the effect of side sway of the web (dx) on the buckling behavior of lipped sigma sections is investigated. The results demonstrate that stiffening inclined components of the web in lipped sigma sections for dx up to 0.5512”(14 mm) act as a stiffener and change the dominant mode of the cross section from the local buckling for the non-stiffened web to the distortional buckling for the stiffened web, and as this value rises, more reduction in the formation of local buckling in the web can be observed, but for the amount more than 0.5512”(14 mm), these components of the web act as an independent element and constrain the vertical parts of the web and local buckling of sub-elements of the web is the dominant mode. Also under a parametric study, the effect of dx on the Euler-local and distortional buckling strengths and influential parameters on them is investigated and the dx value for an optimum design is computed. Outcomes demonstrate that the more rise in the amount of dx augments the Euler-local and distortional buckling strengths and the optimum value of dx is 0.3937”(10 mm) for the target lipped sigma section.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
Wei-Wen Yu International Specialty Conference on Cold-Formed Steel Structures 2018
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2018 Missouri University of Science and Technology, All rights reserved.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Cheraghi, Rashideddin and Mohammadzadeh, Hamidreza, "On the Effect of Web Stiffening of Cold-Formed Steel Thin-Walled Lipped Sigma Sections in Compression Members" (2018). CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018). 1.
https://scholarsmine.mst.edu/isccss/24iccfss/session4/1
On the Effect of Web Stiffening of Cold-Formed Steel Thin-Walled Lipped Sigma Sections in Compression Members
Cold-formed steel cross sections are high strength thin-walled profiles which are highly prone to local and distortional instabilities. Stiffening techniques are utilized in the industry as a solution to enhance local and distortional buckling strengths. The sigma section is that channel section which its web pushed inward for the stiffening reason. In this research, the effect of side sway of the web (dx) on the buckling behavior of lipped sigma sections is investigated. The results demonstrate that stiffening inclined components of the web in lipped sigma sections for dx up to 0.5512”(14 mm) act as a stiffener and change the dominant mode of the cross section from the local buckling for the non-stiffened web to the distortional buckling for the stiffened web, and as this value rises, more reduction in the formation of local buckling in the web can be observed, but for the amount more than 0.5512”(14 mm), these components of the web act as an independent element and constrain the vertical parts of the web and local buckling of sub-elements of the web is the dominant mode. Also under a parametric study, the effect of dx on the Euler-local and distortional buckling strengths and influential parameters on them is investigated and the dx value for an optimum design is computed. Outcomes demonstrate that the more rise in the amount of dx augments the Euler-local and distortional buckling strengths and the optimum value of dx is 0.3937”(10 mm) for the target lipped sigma section.
