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Campus Bridge Project

By: Chris Kennedy, Phil Lagger , Jon Lockie, Chad Pietkowski and Joe Wcislak. Campus Bridge Project. FHWA Definition of a Bridge. Any Highway bridge, including supports, with a clear span of 20 feet or great measured along centerline of roadway. ODOT’s requirements are more strict

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Campus Bridge Project

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  1. By: Chris Kennedy, Phil Lagger , Jon Lockie, Chad Pietkowski and Joe Wcislak Campus Bridge Project

  2. FHWA Definition of a Bridge • Any Highway bridge, including supports, with a clear span of 20 feet or great measured along centerline of roadway. • ODOT’s requirements are more strict • Any highway bridge, including supports, with a clear span of 10 feet or greater measured along centerline of roadway

  3. ODOT Inspection Frequency • Purpose is to document physical and functional conditions of the bridge • Any changes, physical and inventory, that have occurred since prior inspection • Identify existing problems and future concerns • Identify need or revision to weight restriction on the bridge • Identify the need for monitoring of any portion of the bridge

  4. Why inspect campus bridges? • No federal funding was given for construction or maintenance of campus bridges. • No records of being inspected. • Not in the Ohio bridge inventory because they are privately owned and not required to be inspected. • 3 out of the 5 bridges were designed and built in the 60’s early 70’s

  5. Campus Map

  6. Campus Map

  7. West Road Bridge

  8. West Road Bridge

  9. West Road Bridge (1991)

  10. Arts Bridge

  11. Arts Bridge

  12. Arts Bridge (2004)

  13. Library Bridge

  14. Library Bridge

  15. Library Bridge (1964)

  16. Stadium Drive Bridge

  17. Stadium Drive

  18. Stadium Drive Bridge (1961)

  19. Savage Bridge

  20. Savage Bridge

  21. Savage Bridge (1975)

  22. Inspection Tools • Piece of rebar (3 - 4 feet long) • Brick hammer • Flash light • Ladder • Safety vests • Hardhats • Cones • ODOT BR-86 Inspection Form

  23. How Bridges are Rated? • Used the ODOT rating system. • ODOT uses the numbers 1-4 to rate individual items of the bridge. This does not include Summary Items, general appraisal and the live load response. • 1. Good Condition – No repair required. • 2. Fair Condition – Minor deficiency, item still functioning as designed. • 3. Poor Condition – Major deficiency, item in need of repair to continue functioning as designed. • 4. Critical Condition – Item no longer functioning as designed.

  24. How Bridges are Rated? • The following codes are used for the summary and general appraisal sections. • 9. Excellent condition • 8. Very good condition • 7. Good condition • 6. Satisfactory condition • 5. Fair condition • 4. Poor condition • 3. Serious condition • 2. Critical condition • 1. "Imminent" failure condition • 0. Failed condition

  25. What is inspected? • Deck • Superstructure • Substructure • Channel • Approaches • General • Is it functioning as designed?

  26. Deck • The primary function of the bridge deck is to provide a smooth riding surface and to transmit the wheel loads to the supporting members. • Item 1 – Floor (Concrete or Timber) • Item 2 – Wearing Surface • Item 3 – Curbs, Sidewalks, Walkways • Item 4 – Median (Omitted) • Item 5 – Railing • Item 6 – Drainage • Item 7 – Expansion Joints • Item 8 – Deck Summary

  27. Superstructure • The superstructure is the entire portion of a bridge above the abutment and pier seats, excluding the deck. • The superstructure transmits the deck loads to the substructure. • The superstructure and the substructure are generally the two most important aspects of the bridge.

  28. Superstructure • Item 9 – Alignment • Item 10 – Beams/Girders or Concrete Slab • Item 11 – Diaphragms or Cross Frames • Items (12,13,14) – Floor System Items • Items (15-23) – Truss Type Bridges (1 on campus) • Item 24 – Bearing Devices

  29. Superstructure • Items (25,26,27) – Arch Type Bridge (Omitted) • Item 28 – Protective Coating System (PCS) • Item 29 – Pins, Hangers, Hinges • Item 30 – Fatigue Prone Connections • Item 31 – Live Load Response (Excessive, Satisfactory) • Item 32 – Superstructure Summary

  30. Substructure • The substructure is that portion of the bridge below the pier and abutment seats, including footers and piling. • The substructure transmits the loads and stresses from the deck, superstructure, or other load supporting system, to the ground.

  31. Substructure • All exposed or readily accessible portions of the substructure will be inspected at close range. • Underwater investigation will be done to assure that scour and undermining is not threatening the bridge. • This will consist of probing in relatively shallow water and diving in deeper water.

  32. Substructure • Item 33 – Abutments • Item 34 – Abutment Seats • Item 35 – Piers • Item 36 – Pier Seats • Item 37 – Backwall • Item 38 – Wingwalls • Item 39 – Fenders and Dolphins (Omitted) • Item 40 – Scour • Item 41 – Slope Protection • Item 42 – Substructure Summary

  33. Channel • This item describes the physical conditions associated with the flow of water through the bridge such as stream stability and the condition of the channel, riprap, and slope protection. • Inspect the channel 100 ft upstream. • Item 51 – Alignment • Item 52 – Protection • Item 53 – Waterway Adequacy • Item 54 – Channel Summary

  34. Approaches • A smooth transition between the roadway pavement and the bridge deck is important for the reduction of impact forces acting upon the bridge and for driving safety. • Item 55 – Pavement • Item 56 – Approach Slabs • Item 57 – Guardrail • Item 58 – Relief Joints • Item 59 – Embankment • Item 60 – Approach Summary

  35. General Section • Items in this section are of a general nature and do not relate to specific bridge elements. • Item 61 – Navigation Lights (Omitted) • Item 62 – Warning Signs • Item 63 – Sign Supports • Item 64 – Utilities • Item 65 – Vertical Clearance (Omitted) • Item 66 – General Appraisal and Operational Status • This is a two part item. The first box is for coding the general, overall condition of the bridge. • The second box is for coding the operational status of the bridge.

  36. General Appraisal • 9. As built condition • 8. Very good condition - no problems noted. • 7. Good condition - some minor problems. • 6. Satisfactory condition - structural elements show some minor deterioration.

  37. General Appraisal • 5. Fair condition - all primary structural elements are sound, but may have minor section loss, cracking, or spalling. Secondary elements may have significant deterioration. • 4. Poor condition - advanced section loss, deterioration, or spalling. • 3. Serious condition - loss of section, deterioration, or spalling have seriously affected primary structural components. Local failures or cracks in concrete or both may be present.

  38. General Appraisal • 2. Critical condition - advanced deterioration of primary structural elements. Fatigue cracks in steel or shear cracks in concrete may be present. Bridge should be closed or closely monitored, until corrective action is taken. • 1. "Imminent" failure condition - major deterioration or section loss present structural components. Bridge is closed to traffic but corrective action may put back in light service. • 0. Failed condition - out of service - beyond corrective action.

  39. Operational Status • "A" Open, no restriction • "B" Open, posting recommended but not legally implemented (all signs not in place) • “C” Under construction, half of the existing bridge is open to traffic (half-width construction) • "D" Open, would be posted or closed except for temporary shoring, etc. to allow for unrestricted traffic • "E" Open, temporary structure in place to carry legal loads while original structure is closed and awaiting replacement or rehabilitation.

  40. Operational Status • "G" New structure not yet open to traffic • "K" Bridge closed to all traffic • "P" Posted for load-carrying capacity restriction (may include other restrictions) • "R" Posted for other than load-carrying capacity restriction (speed, number of vehicles on bridge, etc.). • "X" Bridge closed for reasons other than condition or load-carrying capacity.

  41. Bridge Ratings • This is a comparison summary of each bridge and their individual components.

  42. Bridge Ratings

  43. Bridge Ratings

  44. Bridge Ratings

  45. Bridge Ratings • Overall summary rating of the individual bridges. • Shows the final rating and operational status.

  46. Deck Deterioration • Rebar showing in deck • Top coat pealing off • Hollow spot at mid span of deck Savage Bridge West Road

  47. Expansion Joints • Rust and deterioration on joints • Leaking expansion joints West Road Stadium Drive

  48. Pitting and Rusting of Steal Members • Pitting was found on all the bridges from being in contact with the river during heavy rainfall. Savage Bridge Library Bridge

  49. Cast in place steel forms • Used to support the concrete during construction • No structural support added • Not ideal for climate of area Savage Bridge Library Bridge

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