CR 30 Roaring Brook Bridge Rehabilitation...CR 30 over Roaring Brook Deck Design • Loads => AASHTO LRFD 4th Ed. 4624.6.2 • Concrete => ACI 440.1R‐06 “Guide for Design and Const

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


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


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


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


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


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


Shear Stud BlockoutShear Stud Blockout PT DuctPT Duct

Bottom FRP BarsBottom FRP Bars

Plastic ChairPlastic ChairPT BlockoutPT Blockout


HP Concrete PlacementHP Concrete Placement


Lifting/LevelingLifting/LevelingLifting/Leveling Lifting/Leveling DeviceDevice

Wet cureWet cure


Steel PreSteel Pre--assemblyassembly


Steel ErectionSteel Erection


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


Transverse Joint GroutingTransverse Joint Grouting


Panel PostPanel Post--TensioningTensioning


Shear Stud GroutingShear Stud Grouting


Long. Jt. GroutingLong. Jt. Groutingg gg g


Waterproofing MembraneWaterproofing Membrane


Nov. 14, 2008 50 + degreesNov. 14, 2008 50 + degrees


Lessons LearnedLessons Learned

• Pick point locationsPick point locations

• Coordinate PT equipment with blockout sizesize

• Galv. bars not good for rehab. of bsubstructures


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


Special Thanks:Special Thanks:

••Lewis CountyLewis County••NYSDOT NYSDOT –– Reg. 7Reg. 7••FHWAFHWA••FHWAFHWA••Project Mascot Project Mascot ––“Buddy”“Buddy”BuddyBuddy

Documents

CR 30 Roaring Brook Bridge Rehabilitation...CR 30 over Roaring Brook Deck Design • Loads => AASHTO LRFD 4th Ed. 4624.6.2 • Concrete => ACI 440.1R‐06 “Guide for Design and Const