This study proposes a concept for the development of a fireproof design code for the verification of dwellings susceptible to wildfire action.There are currently structural codes for the design of buildings when subje...This study proposes a concept for the development of a fireproof design code for the verification of dwellings susceptible to wildfire action.There are currently structural codes for the design of buildings when subjected to indoor fires,outside fires that grow on the facade of buildings,and even fires in an accident situation due to ignitions with hydrocarbons or transportation vehicles.All of these security verification specifications are described in EC1:1-2.The current regulation in Portugal uses safety criteria and risk categories that are for indoor fires,therefore is very conservative and may not present an economic fireproof design against the action of wildfires.The aim of this work is a straight verification based on natural temperature characteristic curves that simulate wildfire heat flow by convection,radiation,and the deposits of firebrands.展开更多
This paper presents an extensive experimental investigation campaign concerning the thermal fire reaction of firebrands,as they accumulate on the exterior walls of dwellings,a common occurrence in southern Europe.Thre...This paper presents an extensive experimental investigation campaign concerning the thermal fire reaction of firebrands,as they accumulate on the exterior walls of dwellings,a common occurrence in southern Europe.Three types of wall core layers were studied:bricks,designed according to the Exterior Thermal Insulation Composite Systems(ETICS)methodology,cross-laminated timber(CLT)and normal wood(NW),both utilizing the sandwich methodology.The wall specimens are made of a combination of materials such as three types of mortar(Tria,Sika,and Weber),and various thermal insulation materials,such as agglomerates of composite cork,impermeable membranes,rigid rock wool,fireproof paint,and extruded polystyrene rigid foam(XPS),which are recommended for their good performance against fire and high temperatures.Firebrands are then deposited on the localized surfaces of the wall specimens,and the temperature is recorded in each layer.This study aims to precisely verify the firebrand reaction to fire,including the type of ignition,smoke and droplet production.The insulation capabilities of each insulation and wall system will also be analyzed.展开更多
文摘This study proposes a concept for the development of a fireproof design code for the verification of dwellings susceptible to wildfire action.There are currently structural codes for the design of buildings when subjected to indoor fires,outside fires that grow on the facade of buildings,and even fires in an accident situation due to ignitions with hydrocarbons or transportation vehicles.All of these security verification specifications are described in EC1:1-2.The current regulation in Portugal uses safety criteria and risk categories that are for indoor fires,therefore is very conservative and may not present an economic fireproof design against the action of wildfires.The aim of this work is a straight verification based on natural temperature characteristic curves that simulate wildfire heat flow by convection,radiation,and the deposits of firebrands.
基金the Foundation for Science and Technology(FCT),Portugal,for the Project“New Fireproof Dwellings for Wildfire PTDC/ECI-CON/2240/2020″(DOI:10.54499/PTDC/ECI-CON/2240/2020)the Foundation for Science and Technology's support through funding UIDB/04625/2020 from the research unit CERIS(DOI:10.54499/UIDB/04625/2020)the financing of the doctoral grants SFRH/BD/03935/2023(DOI:10.54499/2023.03935.BD)and SFRH/BD/04011/2023(DOI:10.54499/2023.04011.BD).
文摘This paper presents an extensive experimental investigation campaign concerning the thermal fire reaction of firebrands,as they accumulate on the exterior walls of dwellings,a common occurrence in southern Europe.Three types of wall core layers were studied:bricks,designed according to the Exterior Thermal Insulation Composite Systems(ETICS)methodology,cross-laminated timber(CLT)and normal wood(NW),both utilizing the sandwich methodology.The wall specimens are made of a combination of materials such as three types of mortar(Tria,Sika,and Weber),and various thermal insulation materials,such as agglomerates of composite cork,impermeable membranes,rigid rock wool,fireproof paint,and extruded polystyrene rigid foam(XPS),which are recommended for their good performance against fire and high temperatures.Firebrands are then deposited on the localized surfaces of the wall specimens,and the temperature is recorded in each layer.This study aims to precisely verify the firebrand reaction to fire,including the type of ignition,smoke and droplet production.The insulation capabilities of each insulation and wall system will also be analyzed.
