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Rehabilitation Design and Evaluation of the Hawthorne Street Bridge FRP Deck Installation

Rehabilitation Design and Evaluation of the Hawthorne Street Bridge FRP Deck Installation. Kristin Kessler 1 , Elizabeth Kricorian 1 , Joseph Fink 1 , John Lesko 1 Thomas Cousins 2 1 Dept. of Engineering Science & Mechanics 2 Via Dept. of Civil & Environmental Engineering Blacksburg, VA 24061.

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Rehabilitation Design and Evaluation of the Hawthorne Street Bridge FRP Deck Installation

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  1. Rehabilitation Design and Evaluation of the Hawthorne Street Bridge FRP Deck Installation Kristin Kessler1, Elizabeth Kricorian1, Joseph Fink1, John Lesko1 Thomas Cousins2 1Dept. of Engineering Science & Mechanics 2Via Dept. of Civil & Environmental Engineering Blacksburg, VA 24061

  2. Where is Virginia Tech? Hawthorne St. Bridge Troutville Weigh Station Tom’s Creek Bridge Dickey Creek Bridge

  3. What’s a Hokie? • O.M. Stull (Class of 1896) won a $5 prize for the cheer now known as Old Hokie: • Hoki, Hoki, Hoki Hy!Tech! Tech! V.P.ISola-Rex Sola-RahPolytech-Vir-gin-i-aRae, Ri, V.P.I.Team! Team! Team! A castrated turkey?

  4. Troutville Weigh Station Troutville Weigh Station

  5. Troutville Weigh Station Deck Test Bed Section A-A 10 ft. 5’ x 15’ Composite Deck Section Excavated panel of PCC pavement in weigh station off- ramp Adjustable/Simulated bridge girders Traffic 15 ft. Section A-A Steel access panels Plan View Girder centerline Facility installed November 1999

  6. Composite Deck & Wearing Surface Design Polymer concrete design: VDOT standard aggregate & toughened vinyl ester applied by “broom and seed method” • Polymer Concrete • Epc = 1.0 Msi • Glass/VE Composite • Ecomp = 2.6/1.8 Msi • Gcomp = 1. Msi • Deck Length L = 15’ - 3” • Deck Width L = 5’ 0.25” 0.375” 0.38” 6.0” 0.375” 6.0” Adhesively bonded off-the-shelf pultruded standard shapes with modified materials Magnabond 900 Adhesive Extren Structural plate and shapes

  7. Strongwell, Corp. Deck Concept May 2000

  8. FRP Deck In-Service Troutville, VA Weigh Station Interstate 81 5,000 vehicles/day Installed Nov. 1999

  9. Hawthorne Street Bridge Hawthorne St. Bridge

  10. Hawthorne Street Bridge

  11. Historic Phoenix Truss System

  12. Successfully Rehabilitate Bridge • Two-way Traffic • Emergency Vehicles • Design Elements • Stringer Spacing • Connection Design • Walkway Design • Cost & Weight Analysis

  13. Railing Connections: • Illinois Steel Railing • Determine • Bolt Strength/Size • Base Plate Strength/Size

  14. Proposed Design • Reduce deck dead load with FRP deck • Smaller sidewalk with FRP decking • Replace all stringers and floor beams

  15. Walkway Design • Strongwell SAFPLANK • Connection • Bolt Assembly • Carriage Bolt Assembly • Deflection • Additional Members

  16. Proposed Additional Steel Sections Preliminary Walkway Design

  17. Conclusions • Durability Modified LRFD for FRP possibly a formidable means to gain acceptance among practicing engineers • Suggest inspection cycle • Phenomenological vs. First Principles • Material Specification? • Is this realistic or just academic???

  18. Acknowledgements • FHWA, Innovative Bridge Research & Construction Program • National Science Foundation • Virginia Center For Innovative Technology • Strongwell, Corp.

  19. QUESTIONS?

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