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Title |
Experimental Study on Fire-Resistant Characteristics of Bi-Directionally Prestressed Concrete Panel under RABT Fire Scenario
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DOI |
https://doi.org/10.4334/JKCI.2012.24.6.695 |
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Keywords |
프리스트레스트 콘크리트 ; 비부착 프리스트레싱 ; RABT 화재시나리오 ; 내화성능 ; 잔류응력 prestressed concrete ; unbonded prestressing ; RABT fire scenario ; fire-resistance ; residual stress |
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Abstract |
Recently, major infrastructure such as bridges, tunnels, PCCVs (Prestressed Concrete Containment Vessel), and gas tanks are Prestressed Concrete (PSC) structure types, which improve their safety by using confining effect from prestressing. Generally, concrete is known to be an outstanding fire resistant construction material. Because of this reason, researches related to extreme fire loaded PSC member behaviors are not often conducted even though PSC behavior under extreme fire loading is significantly different than that of ordinary reinforced concrete (RC) behavior. Therefore, in this study, RABT fire loading tests were performed on bi-directionally prestressed concrete panels with 1000×1400×300 mm dimensions. The prestressed specimens were applied with 430 kN prestressing (PS) force using unbonded PS thread bars. Also, residual strength structural tests of fire tested PSC and ordinary RC structures were performed for comparison. The study results showed that PSC behavior under fire loading is significantly different than that of RC behavior.
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