Predicting the fire resistance of timber members loaded in tension

SUMMARY The paper presents a numerical model for predicting the fire resistance of timber members. Fire resistance is evaluated in a two‐step process implemented in the Abaqus finite element code: first, a time‐dependent thermal analysis of the member exposed to fire and then a structural analysis u...

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Veröffentlicht in:Fire and materials Jg. 37; H. 2; S. 114 - 129
Hauptverfasser: Fragiacomo, Massimo, Menis, Agnese, Moss, Peter J., Clemente, Isaia, Buchanan, Andrew H., De Nicolo, Barbara
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Chichester, UK John Wiley & Sons, Ltd 01.03.2013
Wiley
Wiley Subscription Services, Inc
Schlagworte:
Abaqus
Applied sciences
Building codes
Building insulation
Building structure
Buildings
Buildings. Public works
charring
Computation methods. Tables. Charts
Computer simulation
Construction (buildings and works)
Exact sciences and technology
experimental testing
External envelopes
Finite element method
finite element model
Fire resistance
Fires
Lumber
Materials
Mathematical analysis
Mathematical models
Mechanical properties
Sound insulation
Structural analysis
Structural analysis. Stresses
Thermal analysis
Thermal properties
thermal-structural analysis
Timber
Wood
Wood structure
Wood
Construction materials
Combustion
Wood construction
Experimental study
Forecast model
Modeling
Building functional element
Finite element method
Fire resistance
experimental testing
Abaqus
finite element model
Fire test
charring
Numerical simulation
Thermal analysis
timber
thermal-structural analysis
Comparative study
Structural analysis
ISSN:0308-0501, 1099-1018
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Zusammenfassung:SUMMARY The paper presents a numerical model for predicting the fire resistance of timber members. Fire resistance is evaluated in a two‐step process implemented in the Abaqus finite element code: first, a time‐dependent thermal analysis of the member exposed to fire and then a structural analysis under a constant load are performed. The structural analysis considers the reduction in mechanical properties (modulus of elasticity and strength) of timber with temperature. The analysis terminates when the member can no longer redistribute stresses from the hottest to the coldest parts, leading to structural failure. The model was used to simulate fire tests carried out on specimens made from laminated veneer lumber loaded in tension. Experimental data in terms of temperature, charring depth, displacement and failure time were compared with the numerical results obtained by assuming the thermal properties and degradation of mechanical properties with temperature as suggested by Eurocode 5, showing an overall acceptable approximation. The fire resistance of the timber member was then predicted depending upon the applied tensile loads using the numerical model and analytical formulas. The proposed finite element model can be used to predict the fire resistance of timber structures as an alternative to expensive and complicated experimental tests. Copyright © 2012 John Wiley & Sons, Ltd.
Bibliographie:ark:/67375/WNG-2KW67MSB-B
istex:03C239EB77942C0A7FA684A2B1F996DA4914482A
ArticleID:FAM2117
ObjectType-Article-1
SourceType-Scholarly Journals-1
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ObjectType-Feature-2
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ISSN:0308-0501
1099-1018
DOI:10.1002/fam.2117