Investigation of flexural behaviour of cold-formed steel built-up section beams after exposure to elevated temperature.

Authors

Aakash Patil
M. Tech. Structural Engineering, Department of Civil Engineering, K. E. Society’s, Rajarambapu Institute of Technology, Rajaramnagar (Urun-Islampur), Sangli, Maharashtra, India.
Dr. Pramod Salgar, Assistant Professor
Department of Civil Engineering, K. E. Society’s, Rajarambapu Institute of Technology, Rajaramnagar (Urun-Islampur), Sangli, Maharashtra, India.

Abstract

Recently worldwide industrial constructions have frequently been built using light gauge materials like cold-formed steel (CFS) sections due to their lightweight and affordable design systems. One important aspect of building design and construction that must be considered is fire safety. However, limited studies are reported on experimental and finite element modelling (FEM) of back-to-back built-up channel sections of cold-formed steel (CFS) under flexure behaviour. Four back-to-back built-up CFS sections were considered for the preparation and the structural performance was investigated. CFS test specimens were exposed to elevated temperatures of 500 0 C, 600 0 C and 700 0 C in an electrical furnace to study the effect of temperature on the structural performance of CFS. The thirty-six FEM models were studied for different web-to-thickness ratios and the results were validated. This paper investigates the load-carrying capacity, bending moment and load mid-span deflection. The study concludes that the load-carrying capacity for flexural behaviour is decreased by 56.04% with reference temperature.