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Blast Proof Occupied Buildings
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Contents Presentation
• References
• Functional Specification Blast Resistant Building
• Basis for design
• Blast & impact loading
• Design modeling & analyses
• Preliminary design
• Design details
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Explosion Analyses & Blast Resistant Design
) Q
V stoichiometric
gasges/hr
V Q
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References Blast Resistant Onshore Modular Buildings
BASF Seal Sands Workshop
Blast resistance check 0,9 Psi
Shell Pernis for Hertel CKT
Blast Resistant Modular Building 8 Psi
BP Refineries for Hertel
Blast Resistant Modular Building 13 Psi
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ATEX 137 Implementation & Training
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Functional Specification Blast Resistant Building Shell Pernis
• Frame work structural steel; external walls corrugated plating
• Blast overpressure resistance: 970 mbar; 92,3 millisecond
• Explosion driven 6 inch, 300 lbs blind flange impact resistance
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Blast resistant building lay out Shell Pernis
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Basis for design specifications;codes & standards
• Specifications:– GP 04-30
Guidance on practice for design and location of occupied permanent buildings subject to blast, fire and gas hazards on onshore facilities
– GP 04-20Guidance on Practice for Civil Engineering
– DEP 34.17.10.30-Gen (optional)Technical specification blast resilient and blast resistant control buildings/field auxiliary rooms
• Codes and Standards– ARMY TM 5-1300
Structures to resist the effect of accidental explosions– PGS 1, part 2B: Effects of explosions on constructions; VROM/SZW;
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Basis for design material properties
• Material strengthApplied yield strength Fy = 355 N/mm² (St. 52 or equivalent)Ultimate strength Fu = 510 N/mm²
• Dynamic yield stress Fdy = Fy x SIF x DIFSIF = Strength increase factor
SIF = 1,1 for structural steelSIF = 1,2 for cold formed steel cladding panels
DIF = Dynamic increase factor: DIF = 1.29 for bending/ shearDIF = 1.19 for tension/ compression
• Applied material propertiesStructural steel Fdy = 504/465 N/mm² (Bending-Shear/tension-compression)Sheeting Fdy = 550/507 N/mm²(Bending-Shear/tension-compression)
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Basis for design criteria
Deformation limits
Ductility µ =Total (plastic) deformation/elastic deformationH = Frame height in mm
121.5Plates
22Open web joints
46Metal sheet panels
δ < H/25 mm33Frame members
1220Beams/girths
Ө ºµDeflectionRotationDuctilityElement
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Load combinations
• Overall strength analysis blast resistant building– Dead weight + frame blast loading
• Longitudinal direction• Transverse direction
• Local strength analysis wall and roof panels• Reflected over pressure • Impact loading walls
• Floor– Dead weight + live load (3kN/m²
• Stability– Dead weight + frame blast loading
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Design modeling & analyses
• Computer programs & analyses
– Local wall and roof analysesThe structural impact and response to the blast pressures to theexternal walls and roof are analysed by means of a time domain non-linear physical excel software.
– Overall frame designThe overall structural blast response calculation is performed with the software STAAD.PRO.The peak dynamic reactions from the walls and roof are applied tothe frame members.
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Design model & analysis outside wall panels
– Local wall and roof analyses
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Design model & analysis outside wall panels
Response corrugated sheet
-0.020
0.000
0.020
0.040
0.060
0.080
0.100
0.00 0.10 0.20 0.30 0.40 0.50 0.60
t [sec]
x [m
]
Non linear responseIn-elastic response
Elastic response
`
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Design model & analysis outside wall panels
Non linear spring corrugated sheet
-200000
-100000
0
100000
200000
300000
400000
500000
600000
-0.020 0.000 0.020 0.040 0.060 0.080 0.100
x [m]
Fs [N
]
Non linear spring
0.8
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Design model & analysis outside wall panels
Reaction force corrugated sheet
-100000
-500000
50000100000
150000
200000250000
300000
0.00 0.10 0.20 0.30 0.40 0.50 0.60
t [sec]
V [N
]
Reaction force
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Design model and analysis roof panels
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Design model and analysis roof panels
Response
0.000
0.020
0.040
0.060
0.080
0.100
0.120
0.140
0.160
0.180
0.000 0.020 0.040 0.060 0.080 0.100 0.120 0.140 0.160 0.180 0.200
t [sec]
x [m
]
Non linear response
In-elastic response
Elastic response
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Design model and analysis floor
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Fragment impact analysis
Fragment impact resistance external walls
0
20
40
60
80
100
0 100 200 300 400 500Weight (kg)
velo
city
(m/s
)
6 inch #300 blind flange
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Blast resistant frame model & analysis
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Blast resistant frame model & analysis
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Blast resistant frame model & analysis
Roof
Floor
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Blast resistant frame model & analysis
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Design details
•Doors
•Windows
•Ducts
•Piping
HVAC 250 mm pipe mounted in corrugated wall
3658
b detail c525 800
window 1800 500
29053100
1800
supporting width1140