Research on the Mechanical Properties of Fire-Damaged Reinforced Concrete Columns Strengthened with CFRP

Abstract:

The mechanical properties of fire-damaged reinforced concrete columns rehabilitated by carbon fiber-reinforced polymer (CFRP) rods were studied. This study aims at the effectiveness of CFRP through the contrast test. Nine specimens were tested, including three normal temperature control specimens, and six specimens heated under ISO834 standard fire. After the specimens were exposed to fire, three of them were rehabilitated by CFRP. All specimens were loaded monotonically to failure in the same way. The results showed that the failure of reinforced concrete columns rehabilitated by CFRP was due to losing stabilization, whereas the others were material broken. Furthermore, because of the fire, the load-bearing capacity of specimens was all declined sharply compared with these at normal temperature. From this research, comparing with these normal temperature control specimens, the load-bearing capacity of specimens exposed to fire firstly was ranged from 0.25 to 0.37 times. But the ratio of the loading capacity of specimens rehabilitated by CFRP and normal temperature control ones was ranged from 0.54 to 0.67.

• Periodical: Applied Mechanics and Materials (Volumes 193-194)
• Pages: 1429-1435
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.193-194.1429
• Online since: August 2012
• Authors: Dong Liang Qiu, Kai Yu, Guo Feng Wang, Jun Hua Li
• Keywords: Carbon Fiber Reinforced Polymer/Plastic (CFRP), Fire, Reinforced Concrete (RC)

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