Fire Performance of Cavity-Insulated Cold-Formed Steel Walls
In order to improve the fire performance of cavity-insulated cold-formed steel(CFS)walls,this study conducted two fire tests of non-load-bearing double-layer gypsum-sheathed and cavity-insulated gypsum CFS walls,and investigated the impact of different cavity-insulated configuration on the fire performance of CFS walls.The results show that compared with cavity-insulated CFS walls,walls without insulation in the stud cavity have slower temperature rise at the hot flange and smaller temperature difference between the hot flange and cold flange during the fire exposure.The fire performance of load-bearing CFS walls without insulation in the stud cavity is better than that of cavity-insulated CFS walls.Meanwhile,at a load ratio of 0.27,the fire resistance of CFS walls without insulation in the stud cavity is about 11.5％higher than that of the cavity-insulated CFS walls,and the construction of walls without insulation in the stud cavity is simpler than that of the cavity-insulated CFS walls.Therefore,it can be considered to use load-bearing CFS walls without insulation in the stud cavity to improve the fire performance of CFS walls.In addition,the established simulation method for heat transfer in CFS walls is applicable to different construction types of CFS walls,such as walls without insulation in the stud cavity and cavity-insulated walls,which can provide technical support for future research on fire performance of CFS walls.
fire testcold-formed steel wallfire performancenumerical simulationcavity-insulated configuration
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