Numerical investigation of the behavior of HSC columns in fire

This paper numerically investigates the fire resistance of HSC columns under the ISO-834 standard fire curve. Due to its complexity, concrete behavior is mainly evaluated using experimental testing. Because of the limitations of experimental studies, this study uses the finite element method to model concrete behavior under fire conditions. The effects of various parameters such as concrete cover, loading rate, concrete strength, aggregate type, and axial load on the behavior of concrete columns, including temperature and displacements, are investigated. The results showed that concretes with high cover, low preloading, siliceous aggregates, and lower compressive strength exhibit a higher fire resistance than other types.