Transcript Link to 2012 Presentation Video

Bridge Girder Alternatives for
Extremely Aggressive
Environments
BDV22 TWO 977-01
Project Manager: Will Potter, P.E. - FDOT
Research Team:
Jeff R. Brown, PhD, Assoc. Professor of Civil Engineering - ERAU
Daewon Kim, PhD, Asst. Professor of Aerospace Engineering - ERAU
Ali Tamijani, PhD, Asst. Professor of Aerospace Engineering - ERAU
Project Overview
• Conceptual design study to investigate FRP or
Hybrid-FRP bridge girders for marine environments
• Span lengths limited to 30 – 75 ft
U.S. 192 Indian River Causeway –
East side relief bridge in 1994 (< 50 years old)
Project Overview
• Task 1 – Literature Review
• Task 2 – Conceptual Design Study
• Task 3 – Final Report
Carbon/Glass FRP bridge girder in Madrid, Spain (2007)
Project Timeline
Year
Month
Jul.
Aug
2015
Sep. Oct.
Aug
2016
Sep. Oct.
Nov.
Dec.
Jan.
Feb.
2016
Mar. Apr. May
Jun.
Feb.
2017
Mar. Apr. May
Jun.
Literature
Review
Conceptual
Design Study
Final Report
Year
Month
Jul.
Nov.
Dec.
Jan.
Literature
Review
Conceptual
Design Study
Final Report
Project
Completion
Task 1 – Literature Review
• Existing standards, specifications, and guidelines
Pre-Standard for Load and Resistance Factor Design
(LRFD) of Pultruded Fiber Reinforced Polymer Structures
• Material systems and manufacturing methods
Task 1 – Literature Review
• Current applications of FRP bridge girders
Task 1 – Literature Review
• Advanced composites systems
 3-D Stitching
 Integrated pultruded rods
Images from NASA report on Damage Arresting Composites for Shaped Vehicles
Task 2 – Conceptual Design Study
• Design requirements
 Strength and Serviceability per AASHTO LRFD
and FDOT Structures Design Guidelines (SDG)
 75 year service-life in an “Extremely Aggressive
Environment” per FDOT SDG
 30 ft. to 75 ft simply supported span lengths
Images from NASA report on Damage Arresting Composites for Shaped Vehicles
Task 2 – Conceptual Design Study
• Design requirements (cont.)
 Practical design methodology including:
o Global and local strength requirements
o Connections between deck and girder for
composite action
 Girder is cost-competitive over its service-life with
traditional materials (Reinforced/
Prestressed concrete)
Task 2 – Conceptual Design Study
• Concept development
 Stand-Alone Pultruded Sections
Task 2 – Conceptual Design Study
• Concept development
 Built-up Pultruded Sections
Task 2 – Conceptual Design Study
• Concept development
 VARTM Open-top Box Girders
Task 2 – Conceptual Design Study
• Preliminary analysis and design
• Evaluation criteria
1. Material quantities
2. Material costs
3. Manufacturing costs
a) Tooling
b) Fabrication
4. Constructability
a) Transportation considerations
b) On-site maneuverability
c) Effect on construction timeline
5. Durability
6. Maintenance and inspection
7. Manufacturing adaptability
8. Design methodology
9. Comparison to traditional RC/PC construction
Task 2 – Conceptual Design Study
• Detailed analysis for top three concepts
• Stability analysis for local and global buckling
(finite element analysis)
• Bracing and diaphragms for moment distribution
(including connections)
• Shear transfer between the FRP composite and the concrete
bridge deck
• End bearing design
• Practical design methodologies for top three
concepts
Task 3 – Final Report
• Summarize findings
• Recommendations for future work
Thank you…
Contact info
Jeff Brown
([email protected])
Daewon Kim
([email protected])
Ali Tamijani
([email protected])