Session Start Date

11-5-2014

Session End Date

11-5-2014

Abstract

Experimental and numerical results concerning the post-buckling behavior and strength of fixed-ended cold-formed steel lipped channel columns experiencing interaction involving local, distortional and global buckling (i.e., stemming from the closeness between the critical buckling stresses associated with these three buckling mode types), are reported. After briefly addressing the column specimen geometry selection, the paper presents and discusses the results of an experimental investigation carried out at COPPE, Federal University of Rio de Janeiro (UFRJ, Brazil) and involving 16 columns − its output consists of steel material properties, initial imperfection measurements, equilibrium paths and failure loads/modes. Then, some test results are compared with the values yielded by the corresponding ABAQUS shell finite element simulations. Finally, the paper closes with a brief account of the considerations prompted by the available experimental and numerical ultimate load values, concerning the Direct Strength Method (DSM) design of columns affected by triple (local-distortional-global) mode interaction.

Department(s)

Civil, Architectural and Environmental Engineering

Research Center/Lab(s)

Wei-Wen Yu Center for Cold-Formed Steel Structures

Meeting Name

22nd International Specialty Conference on Cold-Formed Steel Structures

Publisher

Missouri University of Science and Technology

Publication Date

11-5-2014

Document Version

Final Version

Rights

© 2014 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Cold-Formed Steel Lipped Channel Columns Undergoing Local-Distortional-Global Interaction: Experimental and Numerical Investigation

Experimental and numerical results concerning the post-buckling behavior and strength of fixed-ended cold-formed steel lipped channel columns experiencing interaction involving local, distortional and global buckling (i.e., stemming from the closeness between the critical buckling stresses associated with these three buckling mode types), are reported. After briefly addressing the column specimen geometry selection, the paper presents and discusses the results of an experimental investigation carried out at COPPE, Federal University of Rio de Janeiro (UFRJ, Brazil) and involving 16 columns − its output consists of steel material properties, initial imperfection measurements, equilibrium paths and failure loads/modes. Then, some test results are compared with the values yielded by the corresponding ABAQUS shell finite element simulations. Finally, the paper closes with a brief account of the considerations prompted by the available experimental and numerical ultimate load values, concerning the Direct Strength Method (DSM) design of columns affected by triple (local-distortional-global) mode interaction.