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http://dx.doi.org/10.9712/KASS.2017.17.1.069

Analytical Study on Fire Resistance Predictions of Prestressed Concrete Slabs  

Min, Jeong-Ki (Samcheok Real-scale Fire Testing & Research Center, Korea Conformity Laboratories)
Park, Min Jae (School of Civil, Environmental and Architectural Engineering, Korea University)
Ju, Young K. (School of Civil, Environmental and Architectural Engineering, Korea University)
Publication Information
Journal of Korean Association for Spatial Structures / v.17, no.1, 2017 , pp. 69-75 More about this Journal
Abstract
In fire design for floors, the three criteria of stability, integrity and insulation are required for the specified fire resistance duration. Among these, stability is not easy to confirm. For solid prestressed concrete slabs of uniform thickness, Eurocode 2 provides tabulated data and specifies an axis distance to the centroid of strands to achieve particular fire resistance ratings, but it is not clear if this data can be used for a wide range of different prestressed slab profiles. In order to verify the current code-fire ratings for precast prestressed slabs, both simple and advanced calculation methods are investigated. This paper examines the use of calculation methods, accounting for the real behaviour of unprotected simply supported prestressed concrete slabs exposed to the standard ISO 834 fire. The calculated fire resistance of each prestressed concrete slab is compared with tabulated data in Eurocode part 1.2, with detailed discussion.
Keywords
Prestressed concrete slab; Fire resistance; Simple Calculation Methods; Advanced Calculation Methods;
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