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Senior Design Presentation - Winter Term
- 1. Pine Road over Pennypack Creek Senior Design Team 26 Matan Alexander, Gary Reiff, Derek Zaccheo, Cassandra Pruefer, & Steven Kreeley Faculty Advisor: Dr. Ivan Bartoli Technical Advisors: Dr. Emin Aktan and Mr. Benjamin Cohen, E.I.T. 80’
- 2. Outline • Problem Statement • Background • Modeling • Utilities • Hydrology and Hydraulics 2 • Life Cycle Cost Assessment • Alternatives • Future - Continuing Work • Conclusion
- 3. Problem Statement • Deterioration • Load reduction • Emergency retrofit • Consideration of different alternatives • Recommend efficient long term solution 3
- 4. Background - Location 4 Project Location Drexel University Project Location Project Location
- 5. Background - Structural Description • Single span, 80 feet long • Two lanes of traffic • 44 foot wide roadway • 82° abut. skew to road • North-south orientation • Reinforced concrete deck • 8 weathering steel girders 5
- 6. Background - Future and Community Impact • Desire of increasing public transit and commercial revitalization • Goal to alleviate traffic congestion • Current heavy use of bus/train • Upkeep of retail and industrial parks an issue • Growing trend of single to multi-family home conversions 6 Project Location Project Location
- 7. Community Impact - Potential Detour Route • Total distance of approximately 2.36 miles • Emergency Response Located on either side of the structure • Verree Road (SR 1001) bridge also allows for mounted police patrol 7 Project Location
- 8. Background-Inspections and Current Condition • Last City inspection: June 18th, 2014 • Team site visit: Nov. 18, 2015 • Deck: cracking on parapets, spalling, and potholes on deck • North expansion joint in poor condition 8
- 9. Superstructure Inspection • Eight W33x130 girders with cross braces • Section loss evident on girders • Rusting of cross braces & bearings 9
- 10. Substructure Inspection • Both abutments have 3-4” settlement 10 • South abutment - minor cracking, delamination of bridge seats • North abutment - cracked pedestals, pooling water behind bridge seats
- 11. Modeling - AutoCAD • Developed a model to import into SAP2000 • Combination of shell elements (bridge deck), frame elements (beams), and rigid links • Only superstructure 11
- 12. Modeling - SAP2000 • Current condition • Application of loads and load cases • Results: • L/800 deflection • Stress 12
- 13. Utilities • PWD - 20” Main • PGW - 8” Main • 10” sewer and 42” storm sewer run under creek - encased in concrete 13
- 14. Hydraulics and Hydrology 14 • Downstream of structure looking downstream
- 17. Hydraulic Analysis • Normal Clearance 12’-3” • 100-yr Clearance 12’-8” • 500-yr Clearance 15’-4 ½” • Lift Low Chord 6” 17 HY-8 Output Table
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- 20. Life Cycle Cost Assessment • Maintenance Records • Present Net Worth 20 Pine Road over Pennypack Creek Wyoming Avenue over Frankford Creek
- 21. Do Nothing Alternative • Structure in a state of deterioration • Average weight of garbage truck is 32 tons • Impact on community and environment 21
- 22. Repair Alternative • Deterioration of structure due to drainage design flaws • Replace beam ends, deck, and bearings • Very expensive to install temporary supports 22
- 23. Rehabilitation Alternative • Fix abutment for settlement issues • Fix drainage issues • Hydraulic considerations 23
- 24. Replacement Alternative • Need to lift bridge above 100 year storm • Completed Scupper Design Calculations • Fix drainage design issues by adding expansion joint • Abutment to Approach Slab • Fix settlement issues • Propose Prestressed Concrete Beams 24
- 25. Structural Design - Material Considerations 25 Current: Weathering Steel Proposed: Prestressed Concrete • Performs better under wet conditions • Low maintenance • Less expensive than weathering steel • Forms patina • Poor performance under wet conditions • Not recommended in areas wetter greater than 60% of the time
- 26. 8 - Beam Configuration • 80’ long • 8” Deck • 36” Top Flange 26
- 27. 6 - Beam Configuration • 80’ long • 8” Deck • 48” Top Flange 27
- 30. Design Budget 30
- 31. Future - Continuing Work • Completion of Superstructure design • Geotechnical Analysis • Abutment Design • Transportation Design • Modeling • Life Cycle Cost Assessment 31
- 32. Conclusion • Bridge is necessary for community • Recommend replacement alternative • Modeling • Accounted for hydrologic impacts • Structural design calculations • Looked into life cycle cost assessment 32
- 33. Questions? 33