Fire Protection and Corrosion Prevention Branch of China Steel Construction Society

In recent years, a significant progress has been made on fire protection technology for building steel structures in China. This paper reviewed the major achievements in the field of fire resistance research and fire protection technologies for building steel structures since the early 1990s. It systematically analyzed the development of fire simulation technology, fire safety assessment methods, and fire protection technologies. First, it introduced the temperature distribution in large-space fire scenarios and its impact on the fire resistance performance of steel structures, along with fire numerical simulation methods and fire safety assessment techniques. Then, it elaborated on the methods for evaluating the fire resistance capacity of structures based on the load-bearing capacity method and the critical temperature method, highlighting the special requirements for fire safety design in long-span steel structures. Finally, through a series of typical fire safety design cases in steel structure projects, the paper illustrated the application of fire protection technologies in practical engineering. It further explained the crucial role of computational fire protection design methods in ensuring the fire safety of steel structures, enhancing operational economy, and improving building aesthetics. The study aims to provide guidance for research on the theory and design methods of fire resistance in steel structures in China.