Guidelines for Fire Resistance Design of Concrete-Filled Steel HSS Columns-State-of-the-Art and Research Needs

The use of concrete filling offers a practical alternative for providing the required fire resistance in steel hollow structuralsection (HSS) columns and any amount of fire resistance in the practical range can be obtained through proper design. Thispaper presents a critical review on the fire performance of concrete-filled HSS columns. The various studies on fire resistanceof concrete-filled steel columns are reviewed and the available design information for evaluating the fire performance ofconcrete-filled HSS columns is summarized. Practical guidelines that can be implemented during the design and constructionphase, and which have beneficial effects on the fire-resistance behaviour concrete-filled of hollow steel columns, are presented.The applicability of the current design and construction guidelines in field applications is examined, and the various limitationsof the current design approaches are discussed. Finally, steps needed for the development of an approach for performance basedfire safety design for concrete-filled steel columns is outlined.