Study the Structural Behavior of Back-to-Back Cold-Formed Steel Columns with Different Types of Web Stiffeners

Authors

Mahmoud Elnagar, Assistant Professor, Civil Engineering Department, Faculty of Engineering, Menofia University, Shebeen El‑kom, Egypt
Boshra A. El‑Taly, Professor of Structitural Analysis and Mechanics, Civil Engineering Department, Faculty of Engineering, Menofia University, Shebeen El‑kom, Egypt
Dalia N. Elmenshawy, Demostrator, Civil Engineering Department, Faculty of Engineering, Menofia University, Shebeen El‑kom, EgyptFollow
Ghada M. Hekal, Associate Professor of Structitural Analysis and Mechanics, Civil Engineering Department, Faculty of Engineering, Menofia University, Shebeen El‑kom, Egypt

Corresponding Author

Dalia N. Elmenshawy

Subject Area

Civil and Environmental Engineering

Article Type

Original Study

Abstract

Six cold-formed steel columns with lipped channel and different types of web stiffener configurations were experimentally investigated under axial compression forces up to failure. The experimental results were compared with Finite Element; FE analysis using Abaqus program. The behavior characteristics; including the ultimate load, the axial shortening, and the failure mode have been analyzed. The test specimens were brake-pressed from cold-formed steel sheets with nominal thickness of 1.5 mm and then each two identical members were connected back-to-back by selfdrilling screws to form an I-shaped section with edge and web stiffeners. Tests were carried out on short columns with length of 1000 mm and were compressed between fixed base and top hinged end conditions. It was found that a good agreement exists between the experimental and numerical results . Finally, the validated FE model was utilized for a parametric study on cold-formed steel columns with different configurations and dimensions of web stiffeners. From the results, it was observed that stiffening the web increased the ultimate load and improved the structural behavior of the columns and it was also noticed that the column with trapezoidal shape stiffener gave the highest ultimate load.

Keywords

Cold-formed steel channel column; Back-to-Back; Lipped channel; Edge web stiffener; Intermediate web stiffener; Finite element modeling

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 License.

Recommended Citation

Elnagar, Mahmoud; El‑Taly, Boshra A.; Elmenshawy, Dalia N.; and Hekal, Ghada M. (2023) "Study the Structural Behavior of Back-to-Back Cold-Formed Steel Columns with Different Types of Web Stiffeners," Mansoura Engineering Journal: Vol. 48 : Iss. 6 , Article 8.
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