Analyzing the structural and thermal behavior of beam sections filled with steel fiber-reinforced concrete in light-gauge steel

Abstract

This study explores the use of cutting-edge materials to improve the strength and longevity of concrete constructions, with a particular emphasis on the design and functionality of light gauge steel hollow sections (LGSHS) that are filled with concrete reinforced with steel fibers (SFRC) under flexural stress scenarios. Because of its remarkable fire resistance, SFRC enhances the capabilities of Ordinary Portland cement (OPC). Examining member shape, fire being exposed, both concrete and steel buildings, and structural response, the study examines the mechanical qualities and reaction of LGSHS filled with SFRC. A curved trend in force against the midpoint of the displacement and a continuous 12% rise in maximum load capacity is revealed by a comparative comparison between practical and numerical results, demonstrating the synergy of composite components. Infilling LGSHS with SFRC enhances load-bearing capacity, ductility, and toughness. Characterization techniques such as X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS), and Fourier Transform Infrared Spectroscopy (FTIR) are utilized at temperatures up to 1050 °C. The objective of the investigation is to determine the load-carrying capacity, strain, deformation capacity, ductility, and failure characteristics of specimens at both ambient and elevated temperatures. Experimental and analytical findings are juxtaposed with theoretical values proposed by various code provisions.