A LITERATURE REVIEW OF FIRE BEHAVIOUR OF RC BEAMS STRENGTHENED WITH EBR-CFRP STRIPS

Abstract

Abstract: CFRP have been used for a long time as a new kind of reinforcing material. Externally Bonded Reinforced (EBR) is one of the most commonly technologies used in CFRP reinforcement works. But CFRP is sensitive to temperature. When the temperature exceeds the glass transition temperature(T_g)of CFRP, the matrix used to cure the fibers will soften, which leads to the rapid degradation of the mechanical properties of CFRP. This has seriously affected the development of this technology in the field of civil engineering. For solving the problem, many research was done. This paper presents a review of studies on the high temperature properties of CFRP, CFRP-concrete contact surface and fire resistance of EBR-CFRP strengthened beams. In general, when the temperature reaches about 300 ℃, the matrix in CFRP will melt. The tensile strength of CFRP strips will degrade to 50% of their original strength. However, the CFRP-concrete interface is also sensitive to fire. Without fire prevention, the CFRP strips are easy to spin-off. One of the most effective measures is setting fire insulation at the surface of beams. However, there is no integrated theory of fire-resistance design for CFRP strengthened beams up to now. Recommendations for further research are given at the end of the paper.

Key words: CFRP, externally bonded reinforced, fire resistance, prediction method

CLC Number:

TB332

YIN Zhong-hao, XU Jie, HAN Qing-hua. A LITERATURE REVIEW OF FIRE BEHAVIOUR OF RC BEAMS STRENGTHENED WITH EBR-CFRP STRIPS[J]. Fiber Reinforced Plastics/Composites, 2018, 0(2): 94-100.

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