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From theory to practice: FRP STRENGTHENING OF THE STE-ÉMÉLIE BRIDGE

From theory to practice: FRP STRENGTHENING OF THE STE-ÉMÉLIE BRIDGE. Pierre Labossière, ing. Ph.D. Professeur Département de génie civil. FRP Strengthening of the Ste-Émélie Bridge. FRP Strengthening of the Ste-Émélie Bridge. Outline. FRPs for the structural engineer

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From theory to practice: FRP STRENGTHENING OF THE STE-ÉMÉLIE BRIDGE

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  1. From theory to practice:FRP STRENGTHENING OF THE STE-ÉMÉLIE BRIDGE Pierre Labossière, ing. Ph.D. Professeur Département de génie civil

  2. FRP Strengthening of the Ste-Émélie Bridge

  3. FRP Strengthening of the Ste-Émélie Bridge

  4. Outline • FRPs for the structural engineer • Ste-Émélie de l'Énergie Bridge • Bridge description • Research program • FRP strengthening of the bridge • Bridge testing • Budgetary considerations • Instrumentation • Remarks • Conclusion

  5. FRPs for the structural engineer • Fibre reinforced polymers

  6. Fibre (glass or carbon) f frpu Matrix (epoxy or vinylester) Stress E frp e frpu Strain FRPs for the structural engineer • Stress-strain curves

  7. FRPs for the structural engineer

  8. FRPs for the structural engineer

  9. FRPs for the structural engineer

  10. FRPs for the structural engineer

  11. FRPs for the structural engineer

  12. FRPs for the structural engineer • Interest of the Ministère des Transports du Québec (MTQ) • Live load rating factor LLRF = ( C1R – C2D) / C3L • LLRF › 1 QS 660 satisfied • 0.85 ‹ LLRF ‹ 1 Legal load acceptable • Forbidden to overloaded trucks • Reinforcement recommended • LLRF ‹ 0.85  Legal load excessive • Reduced maximum load posted • Reinforcement compulsory

  13. FRPs for the structural engineer • Interest of the Ministère des Transports du Québec (MTQ) • Strengthen bridges for which LLRF < 0.85

  14. FRPs for the structural engineer • Interest of the Ministère des Transports du Québec (MTQ) • Observation • Bridge condition directly related to its LLRF • Bridge in good condition FCS  • Bridge in poor condition FCS  • Search for a demonstration project • Identify a bridge in need of reinforcement (FCS < 1), representative of a large number of existing bridges, and with a concrete surface condition that would allow easy installation of FRPs

  15. FRPs for the structural engineer • Interest of the Ministère des Transports du Québec (MTQ) • Evaluate FRPs as strengthening method • Aim at33 % of cost of new construction • Accessibility to majority of contractors • Minimal technical training for installation/supervision • Design methods available to design engineers

  16. Ste-Émélie de l'Énergie Bridge • Bridge description • Location :Sainte-Émélie-de-l’Énergie, QC • Original construction: 1951 • Length: 21.3 m (70 ft.) • Total width: 11.2 m; 2 traffic lanes: 9.1 m wide • Original design load - H20 truck load • New design load - QS660, CSA Standard S6-88 • Need to increase flexural capacity by 35% • Need to increase shear capacity by 20%

  17. Ste-Émélie de l'Énergie Bridge

  18. 21 336 11 200 9 144 1 524 457 2 743 Ste-Émélie de l'Énergie Bridge

  19. Ste-Émélie de l'Énergie Bridge

  20. Ste-Émélie de l'Énergie Bridge

  21. Ste-Émélie de l'Énergie Bridge

  22. Ste-Émélie de l'Énergie Bridge

  23. Ste-Émélie de l'Énergie Bridge • Research program • Laboratory testing of various strengthening schemes • Rectangular beams • 105 x 350 mm; length = 3.0 m • T-beams • 1:3 scale model of section; length = 6.5 m • Durability assessment • Freeze-thaw cycles • Wet-dry cycles • Small-scale beam specimens (1.1 m long)

  24. Ste-Émélie de l'Énergie Bridge • Research program

  25. 900 mm 65 mm 500mm 5-20M 150 mm Ste-Émélie de l'Énergie Bridge • Research program

  26. C L Stirrups : f = 4.76 mm 14 @ 200 2 @ 305 2635 3365 Ste-Émélie de l'Énergie Bridge • Research program

  27. Ste-Émélie de l'Énergie Bridge • Strengthening for bending and shear

  28. Ste-Émélie de l'Énergie Bridge

  29. Ste-Émélie de l'Énergie Bridge

  30. Ste-Émélie de l'Énergie Bridge

  31. Ste-Émélie de l'Énergie Bridge

  32. Ste-Émélie de l'Énergie Bridge

  33. Ste-Émélie de l'Énergie Bridge

  34. Ste-Émélie de l'Énergie Bridge

  35. Ste-Émélie de l'Énergie Bridge

  36. Ste-Émélie de l'Énergie Bridge

  37. Ste-Émélie de l'Énergie Bridge • Strengthening for bending and shear

  38. a 1f’c fc eci ec d’ f’s Cs c Cc d h Ts esi fs es ebi efrp ffrp bw Tfrp Section Strains Stresses Ste-Émélie de l'Énergie Bridge • Design methods

  39. Ste-Émélie de l'Énergie Bridge • Design methods

  40. Le Ste-Émélie de l'Énergie Bridge • Design methods • Strengthening for shear

  41. Ste-Émélie de l'Énergie Bridge • Design methods • CSA S6-00 (2000): Canadian Highway Bridge Design Code. (Chapitre 16 – Fibre Reinforced Structures.) • CSA S806-01: Design and Construction of Building Components with Fibre Reinforced Polymers, en préparation. • ISIS-M03-01 (2001): Reinforcing Concrete Structures with Fibre Reinforced Polymers. • ACI 440-F: Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures, draft document 2000. • Europe: Design Guidance for Strengthening Concrete Structures Using Fibre Composite Materials

  42. Ste-Émélie de l'Énergie Bridge

  43. Ste-Émélie de l'Énergie Bridge

  44. Ste-Émélie de l'Énergie Bridge

  45. Ste-Émélie de l'Énergie Bridge

  46. Ste-Émélie de l'Énergie Bridge • Strengthening for bending and shear

  47. Ste-Émélie de l'Énergie Bridge

  48. Ste-Émélie de l'Énergie Bridge Beam T2 (Replark - 6 c.)

  49. Ste-Émélie de l'Énergie Bridge • Research description

  50. Ste-Émélie de l'Énergie Bridge

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