Project Objective:

To investigate the structural behaviour of Cold-formed Steel Built-up members subjected to axial compression and bending and develop an appropriate design method to predict the design strength. 

To identify the mechanics reasoning for interactive buckling modes in CFS cross-sections

Existing Design Specifications:

AISI (American Iron and Steel Institute) (2016). “North American Cold-Formed Steel Specification for the Design of Cold-Formed Steel Structural Members.” AISI-S100-16, Washington, DC.

Parameters considered:

• Various slenderness of the cold-formed steel members 

• Various innovative shapes 

• Various failure modes (local, distortional and global buckling and also interaction within them)

International Journal Publications:

9. Structural Behaviour of Cold-formed Steel Built-up Closed Cross-Section Columns - Assessing the Influence of Parameters and Design Methods.

Sivaganesh Selvaraj, and Madhavan, M. (2023). Engineering Structures, 294, 116600. Link 

8. Proposal to Improve AISI S100 DSM Design Standards for CFS Built-Up Closed Cross-Section Columns Subjected to Local-Global Interaction Buckling. 

Sivaganesh Selvaraj, and Madhavan, M. (2023). Journal of Structural Engineering (ASCE), 149(10), 04023136. Link 

7. Splice Connections for Built-up Column Assemblies in Cold-Formed Steel Construction.

Sivaganesh Selvaraj, and Madhavan, M. (2022). Journal of Structural Engineering (ASCE), 149(3), 04022250. Link 

6. Experimental Investigation and Design Considerations on Cold-Formed Steel Built-up I-section Columns Subjected to Interactive Buckling Modes.

Sivaganesh Selvaraj, and Madhavan, M. (2022). Thin-Walled Structures, 175, 109262. Link

5. Design of Cold-formed Steel Built-Up Closed Section Columns using Direct Strength Method. 

Sivaganesh Selvaraj, and Madhavan, M. (2022). Thin-Walled Structures, 171, 108746. Link

4. Direct Strength Approach for Local Buckling of Cold-formed Steel Built-up Beams with Slender Unstiffened Flange Elements. 

Sivaganesh Selvaraj and Madhavan, M. (2021). Practice Periodical on Structural Design and Construction (ASCE)  (Technical Note), 26(3) 0000559. Link 

3. Design of Cold-Formed Steel Back‑to‑Back Connected Built‑Up Beams. 

Sivaganesh Selvaraj and Madhavan, M. (2021). Journal of Constructional Steel Research, 181, 106623. Link

2. Design of Cold-Formed Steel Built-Up Columns Subjected to Local-global Interactive Buckling using Direct Strength Method . 

Sivaganesh Selvaraj and Madhavan, M. (2021). Thin-Walled Structures, 159, 107305. Link

1. Structural Design of Cold-formed Steel face-to-face Connected Built-up beams using Direct Strength Method.

Sivaganesh Selvaraj and Madhavan, M. (2019). Journal of Constructional Steel Research, 160, 613-628. Link