Fire Analysis to Eurocodes!
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8/12/2019 Fire Analysis to Eurocodes! http://slidepdf.com/reader/full/fire-analysis-to-eurocodes 1/9 FIRE ANALYSIS of Steel Structures according to EUROCODES Includes worked examples 0.00 50.00 100.00 0.00 200.00 400.00 600.00 800.00 1000.00 1200.00 THE FIRST COURSE IN FIRE RESISTANT DESIGN
Transcript of Fire Analysis to Eurocodes!
8/12/2019 Fire Analysis to Eurocodes!
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FIRE ANALYSISof Steel Structures
according to EUROCODES
Includes worked
examples
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THE FIRST COURSE IN FIRE RESISTANT DESIGN
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FIRE ANALYSIS
Fire Resistance accordin
Nominal Tempera
- Time curves
Presented by
Structural Engineer
Primož Kvaternik, M.Eng
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THE FIRST COURSE IN
FIRE RESISTANT DESIG
http://www.grsoft.eu
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OVERVIEW
• Thermal Action – Action of the fire on the structure defined in
the shape of time-temperature curve
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Nominal temperature-time curves
Nominal temperature-time curve – as it does not represent real fire, but insted the tempe
measured at previous fires.
10T 20 345 log (8t 1)
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OVERVIEW
• Thermal Action – Action of the fire on the structure defined in
the shape of time-temperature curve• Temperature of Steel Sections – Increased temperature in unprotected
protected steel sections as a result of fire exposure
The heat is transfered from the g
fire compartment to the surface
steel section or fire protection by
convection and radiation.
Convection &
Radiation
Conduction
d
Steel member
Insulation material
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OVERVIEW
• Thermal Action – Action of the fire on the structure defined in the shap
temperature curve – nominal fire curves• Temperature of Steel Sections – Increased temperature in unprotected
protected steel sections as a result of fire exposure
• Mechanical Loading – Load combinations for the Fire Limit States
, , 1 , 1,1 ,1 2 2, , fi d t j k j d k i i k i E G P A Q Q
Action
Imposed loads in buildings
1ψ 2ψ
Category A: domestic, residental areas 0,5 0,3
Category B: office areas 0,5 0,3
Category C: congregation areas 0,7 0,6
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OVERVIEW
• Thermal Action – Action of the fire on the structure defined in the shap
temperature curve – nominal fire curves• Temperature of Steel Sections – Increased temperature in unprotected
protected steel sections as a result of fire exposure
• Mechanical Loading – Load combinations for the Fire Limit States
• Mechanical Analysis – Fire resistance of structural members, critical tem
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Yield st rength Young' s Modulus
,0
, , , ,
, ,
y M
fi Rd y Rd y
M fi M fi
f N k N Ak
, 3.833
139.19 ln 1 482
0.9674d cr
o
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OVERVIEW
• Thermal Action – Action of the fire on the structure defined in the shap
temperature curve – nominal fire curves• Temperature of Steel Sections – Increased temperature in unprotected
protected steel sections as a result of fire exposure
• Mechanical Loading – Load combinations for the Fire Limit States
• Mechanical Analysis – Fire resistance of structural members, critical tem
• Fire Protection of Steel Structures – Insulation materials applied as stee
encasement
Steel frame encased
with
insulationboards
Fire resistant paints
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OVERVIEW
• Thermal Action – Action of the fire on the structure defined in the shap
temperature curve – nominal fire curves• Temperature of Steel Sections – Increased temperature in unprotected
protected steel sections as a result of fire exposure
• Mechanical Loading – Load combinations for the Fire Limit States
• Mechanical Analysis – Fire resistance of structural members, critical tem
• Fire Protection of Steel Structures – Insulation materials applied as stee
encasement• Worked Examples – Calculation of critical temperature and required fire
protection for typical structural elements of real structure
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OVERVIEW
• Thermal Action – Action of the fire on the structure defined in the shap
temperature curve – nominal fire curves• Temperature of Steel Sections – Increased temperature in unprotected
protected steel sections as a result of fire exposure
• Mechanical Loading – Load combinations for the Fire Limit States
• Mechanical Analysis – Fire resistance of structural members, critical tem
• Fire Protection of Steel Structures – Insulation materials applied as stee
encasement• Worked Examples – Calculation of critical temperature and required fire
protection
• Conclusions – Importance of critical temperature on nominal fire resista
