Experimental Study on Strengthening with Bonded Steel Angles for Reinforced Concrete Columns after Fire

Abstract:

The mechanical properties of fire-damage reinforced concrete columns strengthened with bonded steel angles were studied. Nine specimens were tested, including three normal temperature controlled columns, six heated under ISO834 standard fire. After exposure to fire, three of the six were rehabilitated with the bonded steel angles. It was shown by test results that the destructive properties of reinforced concrete columns with bonded steel angles may change and the small eccentric compression specimens may become large eccentric compression due to the steel angles increased the amount of steel in the tension zone of the specimen. In this research, compared with these under normal temperature, the bearing capacity of specimens which were exposure to fire was only ranged from 0.25 to 0.37 times. But the bearing capacity of specimens rehabilitated by the bonded steel angles can increase to 2.86 to 4.04 times of the originals and it can reach to the level of that in normal temperature.

• Periodical: Advanced Materials Research (Volumes 639-640)
• Pages: 1120-1126
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.639-640.1120
• Online since: January 2013
• Authors: Guo Feng Wang, Kai Yu, Jun Hua Li, Dong Liang Qiu
• Keywords: Bonded Steel Angles, Column, Fire, Reinforced Concrete (RC), Strengthening

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