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Postfire full stress–strain response of fire‐damaged concrete
Author(s) -
Nassif Ayman
Publication year - 2005
Publication title -
fire and materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.482
H-Index - 58
eISSN - 1099-1018
pISSN - 0308-0501
DOI - 10.1002/fam.911
Subject(s) - quenching (fluorescence) , stress (linguistics) , stress–strain curve , materials science , compressive strength , structural engineering , strain (injury) , heat stress , range (aeronautics) , forensic engineering , composite material , environmental science , geotechnical engineering , deformation (meteorology) , engineering , geology , medicine , philosophy , linguistics , physics , atmospheric sciences , quantum mechanics , fluorescence
Abstract This paper reports experimental data establishing the postfire full stress–strain response of fire‐affected concrete. Such data are useful in situations when redesign of fire‐damaged concrete elements is considered. Heating was carried out to various temperatures in the range 217–470°C. Cooling was carried out either by quenching or in air. The postfire strain at ultimate stress significantly increased after heating to temperatures higher than 320°C. Quenching seems to aggravate the loss in compressive strength and further increase the strain at ultimate stress. Quenching involved spraying the heated concrete with tap water for 5 min. It is evident that knowledge of maximum temperature of exposure alone is not sufficient for estimation of the postfire stress–strain relationship. Other characteristics of exposure such as method of cooling are also important in evaluating the modification in the structural behaviour of fire‐affected concrete. Copyright © 2005 John Wiley & Sons, Ltd.