Experimental Research on Cold-Formed High-Strength Steel C-Section Stub Columns with Interaction of Distortional and Local Buckling

ZHANG Jiahui; TAN Zhuoqiong

doi:10.13204/j.gyjzG21090908

Volume 53 Issue 11

Nov. 2023

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ZHANG Jiahui, TAN Zhuoqiong. Experimental Research on Cold-Formed High-Strength Steel C-Section Stub Columns with Interaction of Distortional and Local Buckling[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(11): 188-195. doi: 10.13204/j.gyjzG21090908

Citation:

ZHANG Jiahui, TAN Zhuoqiong. Experimental Research on Cold-Formed High-Strength Steel C-Section Stub Columns with Interaction of Distortional and Local Buckling[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(11): 188-195. doi: 10.13204/j.gyjzG21090908

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Experimental Research on Cold-Formed High-Strength Steel C-Section Stub Columns with Interaction of Distortional and Local Buckling

doi: 10.13204/j.gyjzG21090908

School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China

Received Date: 2021-09-09

Abstract

Abstract

Thin-walled open-section members are likely to occur distortional and local buckling, and the interaction between the buckling modes will result in the deterioration of mechanical properties of cold-formed steel columns. Whereas, this interaction is not included properly in the design calculation of the current specifications. A test program of 2 high-strength cold-formed steel C-section stub columns was conducted. This experiment studied the relations between the flange stiffener, flange plate size, plate thickness and the buckling interactions, and their influence on the bearing capacity of compression members. The results showed that: 1) distortional buckling should be considered in design calculation for the bearing capacity of stub columns; 2) the direct strength method and the effective width method overestimated the bearing capacity of compression members that failed by interaction of local and distortional buckling. The buckling mode identification was carried out according to the sequence of occurrence of buckling deformation, and the modified design curves of current direct strength method were proposed for local and distortional buckling, respectively. These modifications could accurately predict the ultimate strength of high-strength cold-formed stub columns that failed by interaction of local and distortional buckling.
- cold-formed high-strength steel,
- buckling coupling,
- axially compressed member,
- identification of buckling mode,
- direct strength method

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References(22)

References

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