Experimental Study on Effects of Temperature on Characteristic Parameters of CFRP-Confined Concrete Prisms
The stress-strain model of concrete prism after high temperature confined by CFRP is scarce, which gives great trouble to the study of mechanical properties of compressed concrete member after fire strengthened by CFRP. This paper presents the results of an experimental study on effects of temperature on characteristic parameters of CFRP-wrapped concrete prisms at elevated temperature. Experimental results indicate that strength and ductility of CFRP-confined concrete prism after high temperature have a large certain extent increase as the result of the action of CFRP. The results reveal that transitional stress, transitional strain, ultimate stress and ultimate strain are related to width of CFRP strip, the greatest temperature, corner radius and layers of CFRP. This has established reliable foundation for the accurate calculation of concrete structures strengthened by CFRP after high temperature or post fire.
Jinglong Bu, Zhengyi Jiang and Sihai Jiao
Y. Zhang and Z. S. Xu, "Experimental Study on Effects of Temperature on Characteristic Parameters of CFRP-Confined Concrete Prisms", Advanced Materials Research, Vols. 150-151, pp. 1400-1404, 2011