Progress of research on fire-resistant steel in civil engineering

With advancements in construction technology, steel structures have become increasingly prevalent in industrial and civil buildings due to their lightweight nature, high strength, and excellent seismic resistance. However, the strength and load-bearing capacity of standard structural steel decrease under high temperatures, resulting in potential damage or even collapse of steel structures during fires. Consequently, these structures often require enhancements such as fire-resistant coatings or panels to improve their fire-resistance capacity. Presently, most countries utilize fire-resistant steel construction, which exhibits superior high-temperature mechanical properties compared to ordinary structural steel, thereby enhancing the fire safety of these structures. This paper presents an overview of the global progress in fire-resistant steel research, discusses the high-temperature mechanical properties of fire-resistant steel and the impact of alloying elements, and illustrates its application in building structural frameworks, fire-resistant compartments, and bridge projects. The information provided herein aims to contribute valuable references for civil engineering practices and future research.