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Analytical and Experimental Study on Cold-Formed Steel Built-Up Sections for Bending.
R Sujitha1, N Sunmathi1, R K Manikandan1
1Department of Civil Engineering, Dhanalakshmi Srinivasan Engineering College, Perambalur 621212, India.
Materials (Basel, Switzerland)
|October 27, 2022
Summary
This study investigated cold-formed steel (CFS) bolted built-up sigma sections. Back-to-back arrangements and increased bolt spacing enhance flexural capacity and load-carrying ability in CFS beams.
Area of Science:
- Structural Engineering
- Materials Science
- Mechanical Engineering
Background:
- Steel structures commonly utilize hot-formed and cold-formed members.
- Cold-formed steel (CFS) sections offer advantages in construction.
- Built-up sections are crucial for enhancing structural capacity.
Purpose of the Study:
- To analyze the strength and characteristics of CFS bolted built-up sigma sections.
- To compare different structural arrangements (face-to-face vs. back-to-back) under bending.
- To evaluate the impact of bolt spacing on the flexural behavior of these members.
Main Methods:
- Finite Element (FE) modeling using ANSYS workbench for buckling analysis.
- Experimental bending tests on various CFS built-up sigma section configurations.
- Parametric study using market-available cross-sectional dimensions.
Main Results:
- Back-to-back connected CFS built-up sections exhibit higher flexural capacity than face-to-face configurations.
- Increased bolt spacing significantly enhances the load-carrying capacity of back-to-back sigma sections.
- Flexural strength is predominantly influenced by bolt spacing and its position.
Conclusions:
- The arrangement and connection details of CFS built-up sigma sections critically affect their structural performance.
- Optimizing bolt spacing is essential for maximizing the load-carrying capacity of these members.
- FE analysis and experimental testing provide valuable insights into the behavior of CFS built-up sections.
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