CFRP Strengthening and Load Testing of the Concrete Deck of I-10 KCS Railroad Overpass Mohsen Shahawy, Ph.D, PE SDR Engineering Consultants, Inc.

Transcription

1 CFRP Strengthening and Load Testing of the Concrete Deck of I-10 KCS Railroad Overpass Mohsen Shahawy, Ph.D, PE SDR Engineering Consultants, Inc. SDR Engineering Consultants, Inc Wednesday Street, Suite 500 Tallahassee, Florida Tel:

2 FRP MATERIALS Fibers: GFRP CFRP AFRP + Resins: Epoxy Polyester Fiber Reinforced Polymers: Bars, Tendons, Grids, Laminates

3 FRP MATERIALS FRP Fiber Reinforced Polymer Fiber Polymer Matrix

4 FRP MATERIALS High strength-toweight ratio Excellent durability 300 HM CFRP (pitch) (220 ksi) CFRP (pan) (310 ksi) AFRP (240 ksi) Non-magnetic Low-transversal resistance (temporary works) Stress (ksi) GFRP (180 ksi) Steel (60 ksi) 0 0% 1% 2% 3% 4% 5% Strain

5 Automotive/Railway and Aerospace General use of FRP in Transportation Aircrafts Race Cars Trucks Cars A380 Fiber Metal Laminate McLaren Formula 1 CFRP Thermoset Car Body Structure SMC Thermoset Parts for Driver Cabin GMT-Thermoplastic Helicopters Sport Cars Buses Concept Cars Rotor Blade Erosion Protection CFRP Thermoset Car Body Structure SMC Thermoset Panels Injection Moulded Thermoplastic Car Body

6 AEROSPACE INDUSTRY Airbus 380 CFRP CFRP GFRP AFRP CFRP

7 Time Aircraft Bridges Fleetster - eight-passenger V-1A Aero-Engineering & Avionics Bridge Structural Engineering The Avro Canada CF-105 Arrow Avionics & Aero-Engineering Civionics + Bridge Structural Engineering 2000 Space Shuttle Discovery

8 RC STRUCTURES Corrosion induced concrete deck deterioration

9 Bridge Durability

10 Accidental Damage

11 RC STRUCTURES Lightweight FRP facilitates installation

12 RC STRUCTURES: Bridge Decks Sierrita de la Cruz Creek (TxDOT) Pierce Street Bridge, OH Taylor Bridge, Manitoba, Canada Wotton, Québec, Canada

13 RC STRUCTURES: Bridge Decks 53 rd Ave. Bridge, IA Mills Rd. Bridge, OH Franklin Co. Bridge, VA Trout River Bridge, Alcan Hwy.

14 RC STRUCTURES: Bridge Decks CFRP grid Integrated with fiber optic sensors Reinforcement of the deck slab before casting Joffre Bridge, Sherbrooke, Québec, Canada

15 RC STRUCTURES: Bridge Decks Salem Avenue Bridge Composite rebars were used in conjunction with stay-inplace form panels to create the deck of the bridge.

16 Stay-in-place forms

17 Stay-in-place forms FRP Tube: Stay-in-place permanent formwork Longitudinal and hoop reinforcement for confinement Non corrosive and protects concrete core concrete I I I I I FRP shell Proposed in San Diego (Virginia)

18 CONCRETE FILLED FRP TUBES PILE APPLICATIONS

19 CONCRETE FILLED FRP TUBES Research and Development

20 FRP BRIDGES To verify theoretical calculations load tests were undertaken Lightweight structures capable of supporting extreme loads

21 FRP ROOF STRUCTURE Aerial Train Station, GA FRP components selected to avoid electromagnetic interference

22 STRENGTHENING STEEL BEAMS CFRP sheets (fiber properties) E = ksi f ult = 355 ksi e ult = 0.40 % CFRP laminates (70% f.v.f) E = ksi f ult = 220 ksi e ult = 0.34 %

23 STRENGTHENING STEEL BEAMS Strengthening system developed and design guidelines established

24 REPAIR AND STRENGTHENING Repair Strengthening Seismic Retrofit

25 FLEXURAL STRENGTHENING Externally Bonded FRP Strips / Sheets Wet lay-up systems Precured Laminates

26 FLEXURAL STRENGTHENING Strengthening of slabs with precured laminates

27 SHEAR STRENGTHENING Inclined orientation: efficient use of fibers

28 COLUMN REPAIR

29 COLUMN REPAIR Column wrapping with sheets for confinement FRP sheets

30 COLUMN REPAIR Pre-repair Active Confinement FRP Grout Column 401 & Leslie

31 Deck Strengthening of Interstate I-10 Bridge Over KCS Railroad Overpass Using FRP Crane position on bridge

32 Deck Strengthening of Interstate I-10 Bridge Over KCS Railroad Overpass Using FRP

33 Deck Strengthening of Interstate I-10 Bridge Over KCS Railroad Overpass Using FRP Mi-Jack gantry Crane configuration

34 Deck Strengthening of Interstate I-10 Bridge Over KCS Railroad Overpass Using FRP Mi-Jack gantry Crane configuration

35 Deck Strengthening of Interstate I-10 Bridge Over KCS Railroad Overpass Using FRP Cross section of the bridge

36 Deck Strengthening of Interstate I-10 Bridge Over KCS Railroad Overpass Using FRP The maximum carried by the heaviest wheel of the crane is 96 kips Deck thickness: 7 inch Beam spacing: 7-5 Concrete strength: 4 ksi AASHTO Type III Girder Crane Wheel Load: Maximum wheel load: 96 kips Wheel location from left beam (CL): inch Tire contact area: 30 inch width, 36 inch long Load factor: 1.25

37 Deck Strengthening of Interstate I-10 Bridge Over KCS Railroad Overpass Using FRP Deck Capacity Strut-and-Tie model FEM analysis showed a maximum wheel load of 43.2 kips

38 Deck Strengthening of Interstate I-10 Bridge Over KCS Railroad Overpass Using FRP Cross Section of the Deck with CFRP Applied Plan View of the Deck Bottom with CFRP Applied

39 Deck Strengthening of Interstate I-10 Bridge Over KCS Railroad Overpass Using FRP

40 Deck Strengthening of Interstate I-10 Bridge Over KCS Railroad Overpass Using FRP

41 Deck Strengthening of Interstate I-10 Bridge Over KCS Railroad Overpass Using FRP

42 Deck Strengthening of Interstate I-10 Bridge Over KCS Railroad Overpass Using FRP

43 Deck Strengthening of Interstate I-10 Bridge Over KCS Railroad Overpass Using FRP

44 Deck Strengthening of Interstate I-10 Bridge Over KCS Railroad Overpass Using FRP

45 Deck Strengthening of Interstate I-10 Bridge Over KCS Railroad Overpass Using FRP

46 Deck Strengthening of Interstate I-10 Bridge Over KCS Railroad Overpass Using FRP

47 Deck Strengthening of Interstate I-10 Bridge Over KCS Railroad Overpass Using FRP

48 Deck Strengthening of Interstate I-10 Bridge Over KCS Railroad Overpass Using FRP

49 Deck Strengthening of Interstate I-10 Bridge Over KCS Railroad Overpass Using FRP

50 The Future is Now Thank You