cr 30 roaring brook bridge rehabilitation...cr 30 over roaring brook deck design • loads =>...
TRANSCRIPT
Concrete Deck Panels with FRP Reinforcement
CR 30 over Roaring Brook Bridge RehabilitationRehabilitation
CR 30 over Roaring BrookCR 30 over Roaring Brook
I Introduction
II Deck design
III ConstructionIII Construction
IV Food for thoughtIV Food for thought
CR 30 over Roaring BrookCR 30 over Roaring BrookLocation: Lewis County
CR 30 over Roaring BrookCR 30 over Roaring BrookLocation: Lewis County
Snow Snow
WindmillsWindmillsWindmills Windmills
CR 30 over Roaring BrookCR 30 over Roaring Brook
IntroductionIntroduction
Project Background
• C&S => 7 FRP Projects (4 – Lewis)• FHWA IBRD Program• FHWA IBRD Program • Precast panels with FRP Bars• Galvanized steel girders• Galvanized steel girders• County fabricated panels
CR 30 over Roaring BrookCR 30 over Roaring Brook
IntroductionIntroduction
Project Specifics
• Bridge adjacent to Town facility Town/County cooperation– Town/County cooperation
– Town facility for staging area• Windmill permit loads• Windmill permit loads
CR 30 over Roaring BrookCR 30 over Roaring Brook
Deck DesignDeck Design
Loads > AASHTO LRFD 4th Ed 4 6 2• Loads => AASHTO LRFD 4th Ed. 4.6.2
• Concrete => ACI 440.1R‐06 “Guide for Design and Const. of Structural Reinforced Concrete with FRP Bars”
• Details – PCI New England Guidelines
CR 30 over Roaring BrookCR 30 over Roaring Brook
Deck DesignDeck Design
• Non‐composite design • Design deck for strength• Check for serviceability
– Deflection– Crack widthD fl ti d k idth ll• Deflection and crack width usually control with FRP Bars
CR 30 over Roaring BrookCR 30 over Roaring BrookDeck Details
• Panel width – Ease of handling– Bridge cross slopeBridge cross slope
• Panel thickness250 mm (10”) thick– 250 mm (10 ) thick
– 50 mm FRP cover
CR 30 over Roaring BrookCR 30 over Roaring BrookDeck Details
• Transverse FRPTransverse FRP
– Top => # 8 @ 5” (overhang governs)
B tt # 7 @ 5”– Bottom => # 7 @ 5”
• Longitudinal FRP– Bottom => # 7 @ 5”
CR 30 over Roaring BrookCR 30 over Roaring BrookFRP vs. Steel rebar
4 # 8 FRP b 1 # 8 t l (26 7 lb )• 4 # 8 FRP bars = 1 # 8 steel (26.7 lbs)
• FRP cost = 2 ‐ 2.5 times > steel
• FRP tensile strength = 2 times > steel
• FRP EFRP = 20‐25% of ESTEELFRP EFRP 20 25% of ESTEEL
CR 30 over Roaring BrookCR 30 over Roaring Brook
Deck DetailsDeck Details
• Deck continuity• Deck continuity
– Post tensioning
–Grouted transverse joints
• Deck to girder connection
– Conventional shear studs
CR 30 over Roaring BrookCR 30 over Roaring BrookTown Highway FacilityTown Highway Facility
Casting PadCasting Pad
CR 30 over Roaring BrookCR 30 over Roaring Brook
Shear Stud BlockoutShear Stud Blockout PT DuctPT Duct
Bottom FRP BarsBottom FRP Bars
Plastic ChairPlastic ChairPT BlockoutPT Blockout
CR 30 over Roaring BrookCR 30 over Roaring Brook
HP Concrete PlacementHP Concrete Placement
CR 30 over Roaring BrookCR 30 over Roaring Brook
Lifting/LevelingLifting/LevelingLifting/Leveling Lifting/Leveling DeviceDevice
Wet cureWet cure
CR 30 over Roaring BrookCR 30 over Roaring Brook
Steel PreSteel Pre--assemblyassembly
CR 30 over Roaring BrookCR 30 over Roaring Brook
Steel ErectionSteel Erection
CR 30 over Roaring BrookCR 30 over Roaring Brook
Panel SettingPanel Setting
CR 30 over Roaring BrookCR 30 over Roaring BrookLongitudinal Longitudinal JointJoint
Transverse jointsTransverse joints
JointJoint
8 Panels in Place8 Panels in Place
CR 30 over Roaring BrookCR 30 over Roaring Brook
Transverse Joint GroutingTransverse Joint Grouting
CR 30 over Roaring BrookCR 30 over Roaring Brook
Panel PostPanel Post--TensioningTensioning
CR 30 over Roaring BrookCR 30 over Roaring Brook
Shear Stud GroutingShear Stud Grouting
CR 30 over Roaring BrookCR 30 over Roaring Brook
Long. Jt. GroutingLong. Jt. Groutingg gg g
CR 30 over Roaring BrookCR 30 over Roaring Brook
Waterproofing MembraneWaterproofing Membrane
CR 30 over Roaring BrookCR 30 over Roaring Brook
Nov. 14, 2008 50 + degreesNov. 14, 2008 50 + degrees
CR 30 over Roaring BrookCR 30 over Roaring Brook
Lessons LearnedLessons Learned
• Pick point locationsPick point locations
• Coordinate PT equipment with blockout sizesize
• Galv. bars not good for rehab. of bsubstructures
CR 30 over Roaring BrookCR 30 over Roaring Brook
Food for thoughtFood for thought
• Design Construction• Design Construction
• County built = $ saved
• Simple & constructible
• Designer was inspector
• Panel Details => Build long lasting
– Life cycle cost savings– Life cycle cost savings
CR 30 over Roaring BrookCR 30 over Roaring Brook
Special Thanks:Special Thanks:
••Lewis CountyLewis County••NYSDOT NYSDOT –– Reg. 7Reg. 7••FHWAFHWA••FHWAFHWA••Project Mascot Project Mascot ––“Buddy”“Buddy”BuddyBuddy