Effect of Spalling on the Biaxial Bending Resistance of Reinforced Concrete Columns Exposed to Fire

Concrete exposed to fire can experience spalling when the pore pressure increases due to water evaporation and that results in the surface sloughing off. This works evaluates the consequences that spalling has on the biaxial bending resistance of reinforced concrete columns exposed to fire by means of a sequential model. In this case, it is a sectional model with fibres integration. The model is able to generate the interaction surfaces of the columns subjected to biaxial bending and 4-sided uniformly exposed to the standard fire curve ISO 834. (c) 2022 Hormigon y Acero, the journal of the Spanish Association of Structural Engineering (ACHE). Published by Cinter Divulgacion Tecnica S.L. This is an open-access article distributed under the terms of the Creative Commons (CC BY-NC-ND 4.0) License