Towards a reliability-based post-fire assessment method for concrete slabs incorporating data from inspection

After a concrete structure has been exposed to fire, a combination of destructive and non-destructive testing, expert judgment and calculations is used to decide whether the structure should be demolished, can be repaired, or may be used without repair or rehabilitation. However, many uncertainties are associated with both the fire duration and the effect of elevated temperatures on the residual mechanical properties of the materials. Consequently, the maximum service load after fire exposure should be assessed based on reliability considerations in order to provide an adequate level of safety. As this type of calculations is too complex and time-consuming for normal use by practitioners, a reliability-based assessment tool has been developed for concrete structures and applied to slabs, which determines the maximum service load after fire. When using the proposed method, a safety level is targeted which is comparable to the safety level associated with the Eurocode format for the design of new structures. It is concluded that the proposed assessment method is both user-friendly and directly applicable for practitioners