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SUREbridgedemonstration event1 September 2017
FRP Composites as a Solution for Sustainable
Construction
Dr Martijn VeltkampHead of engineering departmentFiberCore Europe, Rotterdam, [email protected]
Ronald Grefhorst
Teodor Gheorghe
Outline
1. Why FRP composites?2. Material product3. Advantages of hybrids
• With steel• With concrete: SUREbridge
Advantages of the FRP material
• Strong and safe• Maintenance free• No corrosion, no rot• Fire resistance• Freedom of shape and design • Low life cycle costs• Light weight• Integral structures• Easy to relocate• Durable and recyclable• Chemically resistant• …
Superior material
So when all this possible, why wasn’t it applied in civil engineering structures like
road bridges and lock gates?
So when all this possible, why wasn’t it applied in civil engineering structures like
road bridges and lock gates?
-Because it can delaminate, debond or crack
Glass Fibre Fabric box plate:Flanges, integrally connected by websFlanges 0ᵒ/ ±45ᵒ fabric, web 90ᵒ/±45ᵒ fabric
Thesolution:
Unique characteristics:• Fibers covering all corners• Holding the bottom skin = holding the panel
Any strength, any thickness
Glass Fibre Fabric box plate:Flanges, integrally connected by websFlanges 0ᵒ/ ±45ᵒ fabric, web 90ᵒ/±45ᵒ fabric
Timeline
Fly
Regulations to fly
1997: First bridge by founder of FiberCore, Jan Peeters
450 realised structures
CUR96:2003 FRP design guidance
CUR96:2015 expanded FRP
design guidance
Where FRP stops, go hybrid
Strength is rarely the limit of FRP.
Hybrids offer advantages in situations with:
• Large spans• High slenderness requirements• High stiffness requirements
• Existing structures below strength• Existing overly heavy structures
New-built
Refurbishments
Where FRP stops, go hybrid
True hybrids:Transfer of longitudinal shear stresses between existing and new
Semi-hybrids:Combination of multiple materials
142m viaduct: steel truss with an InfraCore deck
ClientLead
consultantMain
contractorSteel
contractorDesign &
buildLocal
authority
Cross section bridgeSteel truss with FRP floor
Jointcomposite-steel
Curb with ducts and cables
underneath
steel
Traffic bridge Utrecht, across highway A27dimensions : 142 x 6,2 mspan : 6,2 mtraffic class : class 600 kNyear : 2011-2012
Joint steel-composite2011 state-of-the-art and meanwhile improved
Steel plate truss
Composite deck (InfraCore)
Pin through steel and deck
bonded joint
FRP on steel:replacement of concrete for FRP deck
Typical refurbishment situation:• Concrete deck of
insufficient capacity• Arch superstructure does
have sufficient capacity• Limit self weight
Span: 62m, width: 4,5m
SUREbridgeSustainable refurbishment of existing (concrete) bridges
• Restoring the load carrying capacity of aged and deteriorated bridges
• By combining two technologies: – InfraCore FRP decks on top
for deck restoration and additional compressive capacity
– Prestressed carbon external reinforcement on underside for additional tensile capacity
State of the art
Prototype analysis
Client demands
Connection deck-to-concrete
Fabrication
Partial tests
Deck-design and connections between deck-segments
Full-scale tests
Fabrication
Develop design tool
Operating procedure
2015 2016 2017 2018
WP2
WP3
WP4
progress
Phasing and progress
Pilot projectNext step:
1. Remove asphalt 2. Refurbish concrete and reinforcement
3. Apply carbon strips and prestress
4. Install bolts for vertical positioning of decks
5. Install InfraCore deck panels on the bolts
6. Apply grouting betweenexisting and new deck
SUREbridge installation sequence