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Title |
A Evaluation of Fire Behavior According to Member Thickness of Precast Prestressed Hollow Core Slab of Fire Resistance Section
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Authors |
부윤섭(Yoon-Seob Boo) ; 배규웅(Kyu-Woong Bae) ; 신상민(Sang-Min Shin) |
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DOI |
https://doi.org/10.11112/jksmi.2023.27.1.1 |
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Keywords |
프리캐스트; 중공슬래브; 내화단면; 내화모델링 Precast; Hollow Core Slab; Fire resistance section; Fire resistance modeling |
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Abstract |
At construction sites, interest in the production of precast materials is increasing due to off-site conditions due to changes in constructionsite conditions due to increased labor costs and the Act on the Punishment of Serious Accidents. In particular, the precast prestressed hollowslab has a hollow shape in the cross section, so structural performance is secured by reducing weight and controlling deflection through strandedwires. With the application of structural standards, the urgency of securing fire resistance performance is emerging. In this study, a fire-resistancecross section was developed by reducing the concrete filling rate in the cross section and improving the upper and lower flange shapes byoptimizing the hollow shape in the cross section of the slab to have the same or better structural performance and economic efficiency comparedto the existing hollow slab. The PC hollow slab to which this was applied was subjected to a two-hour fire resistance test using the cross-sectionalthickness as a variable, and as a result of the test, fire resistance performance (load bearing capacity, heat shielding property, flame retardanceproperty) was secured. Based on the experimental results, it is determined that fire resistance modeling can be established through numericalanalysis simulation, and prediction of fire resistance analysis is possible according to the change of the cross-sectional shape in the future.
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