Experimental Determination of the Residual Compressive Strength of Fire-Damaged Concrete Columns Retrofitted using CFRP Wrapping

The study presented in this paper aimed to experimentally investigate the residual compressive strength of fire-damaged concrete columns retrofitted using carbon fibre-reinforced polymer (CFRP) wrapping sheets. The experimental program involved testing of ten column specimens (200 mm 200 mm 1500 mm) that were previously exposed to standard fire before being retrofitted using CFRP wrapping sheets. The study imitated a real-life scenario where concrete columns previously exposed to one- and two-hour standard fire while being subjected to service loads (20% and 40% of the column’s ultimate design capacity) were retrofitted using one and two layers of CFRP wrapping sheets. Test results show that the effect of increasing the applied load ratio in reducing the post-fire residual compressive strength was more pronounced in the columns wrapped with two layers of CFRP sheets and exposed to the longer fire duration (2 hours).The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author