The machine learning results are compared with test results, with the separating function method and finite element method results. Various tracks are considered when using machine learning in order to predict the failure times and the temperature evolution on the unexposed side of these walls. A series of large, medium and small scale fire tests are performed or gathered on the gypsum plasterboard walls in order to create a data base. This paper presents the evaluation of fire resistance of steel stud gypsum plasterboard lined walls by means of machine learning. The fire resistance of the wall is assessed by performing expensive fire tests or conservative empirical calculations. Numerical modelling of the fire behaviour of gypsum plasterboard cracking, fall-off and gypsum induced water transport is a great challenge.

The fire resistance of the wall is largely dependent on the thermo-mechanical properties of the gypsum plasterboard. Gypsum plasterboard walls are commonly used in constructions and they provide the passive fire protection as separating elements. The effects of resilient channel installation, insulation types, types and thicknesses of gypsum board, symmetrical and asymmetrical installation of gypsum board and stud types on the fire resistance rating of wall assemblies were investigated. The insulations tested were glass, mineral and cellulose (blown dry and wet spray) fibres. Three 12.7 mm thick regular gypsum boards were evaluated with different masses per unit area: 7.82 kg/m2 with no glass fibre in the gypsum core, 7.35 kg/m2 with glass fibre in the gypsum core and 7.27 kg/m2 with no glass fibre in the gypsum core. Two gypsum board types, Type X and regular, were considered. Three assembly arrangements were studied: symmetrical installation 1x1 (one layer of gypsum board on both the exposed and unexposed sides), asymmetrical installation 1x2 (one layer of gypsum board on the exposed side and two layers of gypsum board on the unexposed side), and symmetrical installation 2x2 (two layers of gypsum board on each of the exposed and unexposed sides) on wood and on light weight steel studs. This report presents the results of 22 full-scale fire resistance tests conducted at the National Fire Laboratory on insulated and non-insulated full-scale gypsum board protected wall assemblies.

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