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Distortional buckling of a CFS channel section with and without stiffened flanges

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Abstract

Cold-formed steel (CFS) sections are commonly applied to modern engineering structures, such as roof truss, purlin and industrial goods rack. This study proposes an analytical model to investigate the distortional buckling behavior of CFS-lipped channel sections considering two load scenarios (i.e., axial compression and pure bending). The formulae and analytical solution for calculating the distortional buckling critical stress of CFS channel sections are derived on the basis of the total potential energy principle. The proposed model is extended to the channel section columns and beams with a stiffened flange. CUFSM and generalized beam theory (GBT) are used to conduct numerous channel section columns and beams to validate the proposed method. Results obtained from the proposed model are compared with those calculated using GBT and/or finite-strip code CUFSM. These numerical results are consistent with the model calculations for channel section with and without stiffeners.

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Acknowledgments

The authors acknowledge the financial support received from the National Natural Science Foundation of China (No. 11572162), the 47th Scientific Research Foundation for Returned Scholars from the Ministry of Education of China, Natural Science Foundation of Zhejiang Province (No. LY13A020007), Ningbo Rail Transit (JS-00-SG-17003) and K.C. Wong Magna Fund at Ningbo University.

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Authors and Affiliations

  1. The Key Laboratory of Impact and Safety Engineering, Ministry of Education of China, Ningbo University, Ningbo, 31521, China

    Meng-Jing Wu, Xu-hao Huang & Jue Zhu

  2. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

    Xu-hao Huang

Authors
  1. Meng-Jing Wu
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  2. Xu-hao Huang
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  3. Jue Zhu
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Corresponding author

Correspondence to Jue Zhu.

Additional information

Recommended by Editor Chongdu Cho

Meng-jing Wu is currently a master’s student at Ningbo University. She received her Bachelor’s degree from Ningbo University, China, in 2016. Her main research interests include the static and dynamic instability of thin-walled structures.

Xu-hao Huang is currently a Ph.D. candidate in Shanghai Jiao Tong University. He received his bachelor’s and master’s degrees from Shenzhen University and Ningbo University, China, in 2013 and 2016, respectively. His main research interests include the stability of cold-formed steel structures.

Jue Zhu is currently a Professor at Ningbo University. She received her bachelor’s and master’s degrees from Ningbo University, China, in 2000 and 2003, correspondingly. She received her Ph.D. degree from the University of Science and Technology of China in 2006. Her main research interests include static and dynamic stability, design optimization and analytical modeling of steel structures, and durability of concrete materials.

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Wu, MJ., Huang, Xh. & Zhu, J. Distortional buckling of a CFS channel section with and without stiffened flanges. J Mech Sci Technol 33, 2623–2632 (2019). https://doi.org/10.1007/s12206-019-0510-z

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  • DOI: https://doi.org/10.1007/s12206-019-0510-z

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