Estimation Method of Residual Performance for Hollow Slab at Elevated Temperature

摘要

??? ?? ?? ??? ?? ?????? ???? ?? ??? ???? ?? ??? ??? ?????. ACI 216 ? Eurocode??? ?? ??? ?? ?? ? ????? ??? ? ?? ??? ?? ?? ??? ?? ?????? ??? ?? ??? ??????. ??? ??? ?? ? ????? ??? ?????? ????, ???? ? ??? ??? ??? ?? ???? ??? ??. ? ????? ?? ???? ???? ???? ???? ?? ?????? ???? ????? ???. Generally, the reinforced concrete slab has great fire resistance performance because concrete has excellent thermalmaterial properties under fire. But, in the case of hollow slab, it will be expected that hollow slabs have different temperaturedistribution and fire endurance performance compare to reinforced concrete slab. Because hollow slab has internal void space thatoccurs decreasing regenerative effect of concrete and formation of internal air layer. Evaluation method for fire resistance performanceof hollow slabs was proposed using wickström’s method. For the casual use of evaluation, simplified method was proposed which waslimited to solid slab and donut type hollow slab which was developed by authors of this research paper. Also, verification on proposedmethod was performed by comparing results of fire experiment for hollow slab and evaluation results. Proposed method of the resultsof this study was possible to predict the residual strength and temperature distribution of slabs under fire.