Blast Resistant Wood Structures
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7/27/2019 Blast Resistant Wood Structures http://slidepdf.com/reader/full/blast-resistant-wood-structures 1/2 The AEWC Center at the University of Maine in partnership with the US Army Corps of Engineers R & D Center has developed blast-resistant structures with coated wood framing members, panels and subassemblies. These blast- resistant materials are economically coated to enhance the construction mate- rial’s ductility and energy dissipation capacity. In addition to superior blast resistance, benefits of these structures include: Cost-efficiencies Ease of assembly Environmental durability Rapid deployment High strength to weight ratios Protection from moisture absorption, termites, ants and biodegradation Applications for blast-resistant wood structures: military force protection protection of government buildings for homeland security reinforced structures for corrections facilities improved earthquake, hurricane and tornado resistance in resi- dential and commercial construction Blast-resistant Modular Stru Force Protection intact after 75’ After a 33’ standoff blast - Uncoated panels (left) and coated panels (right) Field Testing: Fort Polk, Louisiana, July/August 2007 The system of panelized wall, roof and floor sections is lightweight enough to be handled manually and ductile enough to dissipate energy from blasts. The system met and exceeds Unified Facilities Criteria for Inhabited Temporary Structures. Conventional wood structures damaged by explosive weapons (left) and hurricane winds (right) High strength, energy absorbing materials for blast and disaster resistant construction High strength, energy absorbing materials for blast and disaster resistan H.J. Dagh The AEW University hd@umit 207 581 2 Contacts: Larry Parent The AEWC Center University of Maine [email protected] 207 581 2718 The AEWC Center 5793 AEWC Bldg University of Maine Orono, ME 04469-5793 207 581 2123 [email protected] Blast-Resistant Wood Structures Laboratory and field testing have both indicated that these high performance, blast resistant materials are 6-7 times more energy absorbing than conventional wood and wood-based composites.
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Transcript of Blast Resistant Wood Structures
7/27/2019 Blast Resistant Wood Structures
http://slidepdf.com/reader/full/blast-resistant-wood-structures 1/2
The AEWC Center at the University of Maine in partnership with the US ArmyCorps of Engineers R & D Center has developed blast-resistant structures withcoated wood framing members, panels and subassemblies. These blast-resistant materials are economically coated to enhance the construction mate-rial’s ductility and energy dissipation capacity.
In addition to superior blast resistance, benefits of these structures include:Cost-efficiencies
Ease of assembly
Environmental durability
Rapid deployment
High strength to weight ratios
Protection from moisture absorption, termites, ants and biodegradation
Applications for blast-resistantwood structures:
military force protection
protection of government buildings for homeland security
reinforced structures for corrections facilities
improved earthquake, hurricane and tornado resistance in resi-
dential and commercial construction
Blast-resistant Modular StruForce Protection intact after 75’
After a 33’ standoff blast -
Uncoated panels (left)and coated panels (right)
Field Testing: Fort Polk, Louisiana, July/August 2007
The system of panelized wall, roof and floor sections is lightweight enough to
be handled manually and ductile enough to dissipate energy from blasts.
The system met and exceeds Unified Facilities Criteria forInhabited Temporary Structures.
Conventional wood structures damaged byexplosive weapons (left) and
hurricane winds (right)
High strength, energy absorbing materials for blast and disaster resistant construction High strength, energy absorbing materials for blast and disaster resistan
H.J. DaghThe AEWUniversityhd@umit207 581 2
Contacts:Larry ParentThe AEWC CenterUniversity of [email protected] 581 2718
The AEWC Center5793 AEWC Bldg
University of MaineOrono, ME 04469-5793
207 581 [email protected]
Blast-Resistant WoodStructures
Laboratory and field testing have
both indicated that these highperformance, blast resistantmaterials are 6-7 times more
energy absorbing thanconventional wood and
wood-based composites.
7/27/2019 Blast Resistant Wood Structures
http://slidepdf.com/reader/full/blast-resistant-wood-structures 2/2
Displacement ( in. )
0 1 2 3 4 5 6 70
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Displacement (in)
L o a d
( l b )
Wall Panel Comparison
Conventional Wall
FRP Coated Wall
0 1 2 3 4 5 6 70
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Displacement (in)
L o a d
( l b )
Wall Panel Comparison
Conventional Wall
FRP Coated Wall
32688FRP Coated
7508None
Energy Absorbed
(in-lbs)
Coating
32688FRP Coated
7508None
Energy Absorbed
(in-lbs)
Coating
Conventional WallCoated Wall
The coating unlocks energythat exists inside
the wood in a manner thathas not been used before.
This allows otherwise brittlewood to become ductile.
An ISO 17025 Accredited Testing Laboratory Accredited by International Accreditation Service
High strength, energy absorbing materials for blast and disaster resistant construction
Connection SyIn wood framed buildings, walls to the floor and rooflinks. To take advantage ostrength and ductility of tpanels and studs, connectstrong and flexible enough failure of the panels have bee
Wall PaneThe 4’x8’ walls have coated16” o.c and are fastened towood with #8x2.5” screws.
Studs
Conventional No. 2 grade stuoptimize bending strength areduce variability resulting iability.
Uncoated wall panel fails in tension quicklythus allowing little energy absorption
Failure mode of conventional, uncoatedstud
Failure mode of coated stud
Test Setup for 2x4 studs
Coated 2x4’s have 2.3 times morestrength and 6.7 more energyabsorption than conventional
#2 grade studs
Coated wall panel assemblies show 2.4 times more strength and 4.4times more energy absorption than uncoated panels.
Blast-ResistantWood Structures
EASE OF ASSEMBLY A 12’x20’ blast-resistant Modular Structure for Force
Protection may be easily installed. After the foundationis level, the structure takes 90 minutes for 12 personnel
to install.
Displacement (in )
0 0.5 1 1.5 2 2.5 3 3.5 4 4.50
500
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Displacement (in)
L o a d (
l b )
2x4 Stud Comparison
Uncoated Studs
Coated Studs
