An Experimental Study on Fire Resistant Performance of Legally Prescriptived Slabs

Abstract

This study aimed to secure the test data for improving the classification scheme of related regulations about fire resistant slabs by testing the structural member of RC, SRC and SWM slabs which legally prescriptived. Test result may be summerised as follows. (1) In the equal thickness condiion of covering, the deflection of specimen of RC, SRC and SWM showed to have equivalent performance at the rate of 40~44% in the case of 40 mm, 34~37% of 50 mm to the proportion of allowed criteria. It can be placed in order, however, RC, SRC and SWM as a view of fire resisting rate. (2) An increase of 10mm cover thickness of slab lead to the fire resisting rate up to 8% and 7% in SRC and SWM, respectively. This showed that the fire resisting rate increases in proportion to the cover and whole thickness, with few influenced by structural type. (3) The insulation performance of slabs improved by increasing whole thickness, with few influenced by structural type or covering thickness, but in the case of over the 200 mm of thickness of slab it was not further improved.