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Bärförmåga vid brand i Br2-byggnader

Olofsson, Markus LU and Melin, Elisabeth (2013) In LUTVDG/TVBB VBR920 20122
Division of Fire Safety Engineering
Civil Engineering (M.Sc.Eng.)
Risk Management and Safety Engineering (M.Sc.Eng.)
Division of Risk Management and Societal Safety
Division of Risk Management and Societal Safety
Abstract
An aim with this master thesis is to evaluate when, according to Swedish building code, design of structural fire protection can be carried out using a localized fire as the design fire, i.e. to determine when flashover is not likely. Another aim of the thesis is to examine how a structure is globally affected by a local failure due to a localized fire. One of the goals is to develop a method that obtains a probabilistic distribution of the maximum heat release rate in a building. Such a method would be able to provide input to whether flashover is likely or not and therefore would help in determining whether a localized fire can be used for fire design of building structures. The other goal is to evaluate how robustness of a structure can... (More)
An aim with this master thesis is to evaluate when, according to Swedish building code, design of structural fire protection can be carried out using a localized fire as the design fire, i.e. to determine when flashover is not likely. Another aim of the thesis is to examine how a structure is globally affected by a local failure due to a localized fire. One of the goals is to develop a method that obtains a probabilistic distribution of the maximum heat release rate in a building. Such a method would be able to provide input to whether flashover is likely or not and therefore would help in determining whether a localized fire can be used for fire design of building structures. The other goal is to evaluate how robustness of a structure can be achieved in the case of a failing structure element.
The developed method allows for determining heat release rate that can be used in fire safety design of structural members using localized fires. A localized fire can produce high temperatures, which can decrease the structural elements load bearing capacity. This can result in a local failure that can induce a progressive collapse. Robustness, achieved either by segmentation or alternate load paths, can be countermeasures to prevent progressive collapse due to initial failures caused by localized fires. (Less)
Please use this url to cite or link to this publication:
@misc{4002999,
  abstract     = {An aim with this master thesis is to evaluate when, according to Swedish building code, design of structural fire protection can be carried out using a localized fire as the design fire, i.e. to determine when flashover is not likely. Another aim of the thesis is to examine how a structure is globally affected by a local failure due to a localized fire. One of the goals is to develop a method that obtains a probabilistic distribution of the maximum heat release rate in a building. Such a method would be able to provide input to whether flashover is likely or not and therefore would help in determining whether a localized fire can be used for fire design of building structures. The other goal is to evaluate how robustness of a structure can be achieved in the case of a failing structure element.
The developed method allows for determining heat release rate that can be used in fire safety design of structural members using localized fires. A localized fire can produce high temperatures, which can decrease the structural elements load bearing capacity. This can result in a local failure that can induce a progressive collapse. Robustness, achieved either by segmentation or alternate load paths, can be countermeasures to prevent progressive collapse due to initial failures caused by localized fires.},
  author       = {Olofsson, Markus and Melin, Elisabeth},
  issn         = {1402-3504},
  keyword      = {Eurocode,steel constructions,localized fire,fire damage area,heat release rate,robustness,progressive collapse,local failure,segmentation,alternate load paths,fire design of building structures,flashover,probability for flashover,EKS 8,Eurokod,Br2-byggnader,stålkonstruktioner,lokal brand,brandskadeområde,effektutveckling,robusthet,progressiv kollaps,lokal kollaps,segmentering,alternativa lastvägar,brandteknisk dimensionering av bärverk,övertändning,sannolikhet för övertändning.},
  language     = {swe},
  note         = {Student Paper},
  series       = {LUTVDG/TVBB},
  title        = {Bärförmåga vid brand i Br2-byggnader},
  year         = {2013},
}