procedural method of application of engeneering methods
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www.hhpberlin.de
Dr.-Ing. Jochen Zehfuß
Head of Hamburg branch
hhpberlin Ingenieure für Brandschutz GmbH
1
Procedural method of application of engeneering methods in Germany
Fire design practice in Germany
Dr.-Ing. Jochen ZehfussHead of Hamburg branchhhpberlin Fire Safety Engineers
www.hhpberlin.de
Dr.-Ing. Jochen Zehfuß
Head of Hamburg branch
hhpberlin Ingenieure für Brandschutz GmbH
2
hhpberlin
hhpberlin was founded in the year 2000 and is now represented germanwide and provides its services all over the world.
hhpberlin stands for next-generation fire protection services with its:
• competent fire protection and life safety services,
• beginning with the very first planning and draft concept, using
performance-based methods, and ending with handover ready
for occupancy,
• for offices, residences and administration, sports arena,
airports and train stations, industry and transit, governmental
buildings, hotels, skyscrapers and historical buildings,
• in Germany and worldwide.
Germanys first address for fire protection services
Dr.-Ing. Jochen Zehfuß is head of the Hamburg branch.For six year now, Dr. Zehfuß consults architects and owners in fire protection as well as implements construction projects in Germany and worldwide.
Berlin • Frankfurt • Hamburg • Munich
www.hhpberlin.de
Dr.-Ing. Jochen Zehfuß
Head of Hamburg branch
hhpberlin Ingenieure für Brandschutz GmbH
3
Introduction
Safety targets anchored in building codes
Prescriptive design Performance-based design
Material requirements according to building codes and guidelines
- holistic fire design concept- Application of engineering methods
Optimisation of fire protection
www.hhpberlin.de
Dr.-Ing. Jochen Zehfuß
Head of Hamburg branch
hhpberlin Ingenieure für Brandschutz GmbH
4
• R 30 for buildings h <= 8 m
• R 60 for buildings h <= 13 m
• R 90 for high rise buildings
and und special buildings
• For common design of steel
elements usually
cost-intensive
fire protection materials
needed
Material requirements in German building codes
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0 15 30 45 60 75 90
time [min]
tem
pera
ture
[°C
]
ISO 834 standard fire
Natural fires
Introduction
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Dr.-Ing. Jochen Zehfuß
Head of Hamburg branch
hhpberlin Ingenieure für Brandschutz GmbH
5
Fire design methods
Standard firestandard temperature-time curve
Tabulated design
DIN 4102 part 4 and 22
Eurocode 2 to 6 part 1-2
Simplified calculation methods
Eurocode 2 to 6 part 1-2
advanced calculation methods
Eurocode 2 to 6 part 1-2
Natural fireParameter dependend fire exposure;
Eurocode 1-1-2 = EC 1-1-2+national annex AA
www.hhpberlin.de
Dr.-Ing. Jochen Zehfuß
Head of Hamburg branch
hhpberlin Ingenieure für Brandschutz GmbH
6
6
• Application of perfomanced based method is a discrapency of the
building code
• Application of perfomanced based method requires emphatic
approval of the building authority and the fire brigade
• Performance based design is conducted by Eurocodes
• National annex replaces infomative annexes of Eurocode 1
• National annex is to published in August 2010
Application of performance based design
www.hhpberlin.de
Dr.-Ing. Jochen Zehfuß
Head of Hamburg branch
hhpberlin Ingenieure für Brandschutz GmbH
7
National annex of Eurocodes 1-1-2
• Annex AA Simplified natural fire model for fully-developed
compartment fires
• Annex BB Input data for application of natural fire models (including a
new safety concept)
• Annex CC (informative) Checking an validation of calculation
programs for fire safety design by advanced calculation methods
www.hhpberlin.de
Dr.-Ing. Jochen Zehfuß
Head of Hamburg branch
hhpberlin Ingenieure für Brandschutz GmbH
8
Parametric curves EN 1991-1-2
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0 10 20 30 40 50 60time [min]
tem
pe
ratu
rer
[°C
]
0
10
20
30
40
rate
of
he
at
rele
ase
[M
W]
temperature test
temperature EN 1991
rate of heat release EN 1991
no temporal correlation between RHR and parametric curves
www.hhpberlin.de
Dr.-Ing. Jochen Zehfuß
Head of Hamburg branch
hhpberlin Ingenieure für Brandschutz GmbH
9
t3t2t1
0
1
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0 15 30 45 60 75 90 105 120 135 150 165 180
time [min]
rate
of h
eat r
elea
se [M
W]
0
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1200
tem
pera
ture
[°C
]
Rate of heat release
Temperature of upper layerT2
T3
T1
q= 1300 MJ/m²
Derivation of annex AA-curves
www.hhpberlin.de
Dr.-Ing. Jochen Zehfuß
Head of Hamburg branch
hhpberlin Ingenieure für Brandschutz GmbH
10
New parametric curves in annex AA
www.hhpberlin.de
Dr.-Ing. Jochen Zehfuß
Head of Hamburg branch
hhpberlin Ingenieure für Brandschutz GmbH
11
New safety concept in annex BB
• Probability of occurance per year: pfi = p1 * p2 * p3
• P1: probability of occurance of an initial fire in a compartment• P2: probability of failure of manual fire defense• P3: probability of failure of fire protection measures
• accepted probability of failure (e. g. pf = 1,3 * 10-5 for medium damages)
• accepted conditional probability of failure: pf,fi = pf / pfi
• Zuverlässigkeitsindex: bfi = -F-1 (pf,fi) = 0,82
www.hhpberlin.de
Dr.-Ing. Jochen Zehfuß
Head of Hamburg branch
hhpberlin Ingenieure für Brandschutz GmbH
12
New safety concept in annex BB
www.hhpberlin.de
Dr.-Ing. Jochen Zehfuß
Head of Hamburg branch
hhpberlin Ingenieure für Brandschutz GmbH
13
Validation examples in annex CC
Bild wird noch von mir ergänzt
www.hhpberlin.de
Dr.-Ing. Jochen Zehfuß
Head of Hamburg branch
hhpberlin Ingenieure für Brandschutz GmbH
14
• Alstertal shopping centre, Hamburg (steel construction garage),
• Berlin Central station
• Eurobahnhof, Saarbrücken (existing reinforced concrete slabs),
• National Convention Centre, Hanoi (steel construction),
• Willy Brandt International Airport Berlin (steel construction),
• Frankfurt/M International airport (prestressed concrete beams),
• Volksbank Arena, Hamburg (steel construction),
• High rise tower Riga (facade construction)
• Headquarter adidas, Herzogenaurach (steel construction)
References structural fire safety design
www.hhpberlin.de
Dr.-Ing. Jochen Zehfuß
Head of Hamburg branch
hhpberlin Ingenieure für Brandschutz GmbH
15
Contact detailshhpberlin Ingenieure für Brandschutz GmbH
Rotherstraße 1910245 Berlin
Fraunhoferstraße 680469 München
Kurze Mühren 2020095 Hamburg
Wilhelm-Leuschner-Straße 4160329 Frankfurt am Main
Germany
Phone: +49 (30) 89 59 55-0 [email protected]: +49 (30) 89 59 55-100 www.hhpberlin.de
Geschäftsführer:Dipl.-Ing. Margot EhrlicherDipl.-Inf. BW (VWA) Stefan TruthänDipl.-Ing. Karsten Foth
Prokurist:Dipl.-Ing. Harald Niemöller
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