Residual and post-cooling stress-strain curves for traditional and self-compacting concrete

This paper presents a model for the stress-strain relationship of both traditional and self-compacting concrete after exposure to fire. The model is based on the Sargin model which is used in EN1992-1-1 and takes further into account the load ratio maintained during heating, the temperature level and the storage period after cooling. Therefore, a test program is conducted with variation of the load ratio up to 30 % of the initial strength, temperatures up to about 500°C and storage periods of 0 days (immediately tested after cooling) or about 50 days in moist air