Browsing by Author "Leite, Pedro"
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- The Density Effect in (W-S-W) Wood Connections with Internal Steel Plate and Passive Protection under FirePublication . Silva, Lino; Leite, Pedro; Fonseca, Elza M MThe main objective of this work is to understand the fire behaviour of unprotected wood-to-wood connections with internal steel plate (W-S-W) in comparison with connections using passive protection with gypsum plasterboard. Passive fire protection uses systems that help prevent the spread of fire. Analytical methodologies according Eurocode 5 part 1-1 were used to the designed connections in different wood densities material. After that, to predict the fire exposure and the connection capacity a computational modelling was performed. Results of the temperature field and the char layer formation, for unprotected and protected members, were compared. Two different cross sections, only in wood or in wood-steel, were chosen to verify the evolution of charring rate effect.
- The Fire Resistance of (W-W-W) Wood-To-Wood Connections Protected with Different Types of Gypsum PlasterboardPublication . Leite, Pedro; Silva, Lino; Fonseca, Elza M MThe main objective of this work is to verify the fire resistance of unprotected (W-W-W) wood-towood connections and compare the results with protected connections using gypsum plasterboard. According Eurocode 5, part 1-2 the connections could be protected by the addition of wood panelling, wood-based panels or gypsum plasterboard type A, H or F. To obtain conclusions according the application of different type of gypsum plasterboard in the designed W-W-W connections in different densities material, numerical models were building to verify the level of protection in fire action. The wood behaviour varies with temperature and its influences the progressively properties degradation. After fire exposure, it is need to determine if the charred wood connections will rest safe for use. Design methods require the use of analytical methodologies and computational modelling to predict the fire exposure and the components capacity to resist to this action. Results of the temperature field in the studied connections under fire will be presented, with the measured char layer in unprotected members and comparing the protected efficiency with different types of gypsum plasterboard.