Mechanical Performance of Beams Strengthened by Carbon Fiber Sheet Bonded with Inorganic Adhesive after Fire

Abstract:

According to the fact that softening temperature of organic epoxy adhesive is too low to meet fire, an inorganic adhesive whose strength at 600°C is not lower than that at normal room temperature, is developed to bond Carbon Fiber Sheet (CFS) in order to strengthen reinforced concrete beams. To understand all-round mechanical performance of RC beams strengthened by CFS bonded by an inorganic adhesive after fire, on the base of experimental research, Conjugate Beam Method is used to analyze the whole mechanical process from loading to failure. The test and analysis results show that, for RC slabs strengthened by CFS bonding with the inorganic adhesive, maximum stress of CFS decreases with small amplitude compared with that before fire, and the strength of the sheet can be utilized to a great extent, even if temperature (about 300°C~470°C) an inorganic adhesive experienced outclasses softening temperatures of ordinary organic epoxy adhesives. Beams strengthened by CFS bonded with inorganic adhesive perform good fire behavior.

• Periodical: Applied Mechanics and Materials (Volumes 256-259)
• Pages: 873-877
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.256-259.873
• Online since: December 2012
• Authors: Fu Xiong Wan, Wen Zhong Zheng
• Keywords: After Fire, Carbon Fiber Sheet, Conjugate Beam Method, Inorganic Adhesive, RC Beam

References

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