| Title |
Experiment for the Improvement of Fire Resistance Capacity of Reinforced Concrete Flexural Member Strengthened with Carbon Fiber Reinforced Polymer |
| Authors |
Lim, Jong-Wook ; Seo, Soo-yeon ; Song, Se-Ki |
| DOI |
https://doi.org/10.5659/JAIK_SC.2017.33.12.19 |
| Keywords |
Fire-resistance capacity ; FRP retrofit method ; High temperature exposure test ; Externally bonded retrofit ; Near-surface-mounted retrofit ; Fire-resistance (FR) board |
| Abstract |
This paper is a study to improve the fire-resistance capacity of reinforced concrete (RC) members strengthened by fiber-reinforced-polymer (FRP). The fire resistance of the RC members strengthened by FRP was evaluated through high temperature exposure test. In order to improve the fire resistance of the FRP reinforcing method, a fire-proof board was attached to the reinforced FRP surface and then the high temperature exposure test was carried out to evaluate the improvement of the fire resistance performance. It was confirmed that the resistance to high temperature of NSMR could be improved somewhat compared with that of EBR from the experiment that exposed to high temperature under the load corresponding to 40% of nominal strength. When 30 mm thick fire-resistance (FR) board is attached to the FRP surface, the surface of the reinforced FRP does not reach 65℃, which is the glass transition temperature (GTT) of the epoxy until the external temperature reaches 480℃. In particular, when a high performance fire-proof mortar was first applied prior to FR board attachment, the FRP portion did not reach the epoxy glass transition temperature until the external temperature reached 600℃. |