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’

Outline • Problem Statement

• Background

• Modeling

• Utilities

• Hydrology and Hydraulics

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• Life Cycle Cost Assessment

• Alternatives

• Future - Continuing Work

• Conclusion

Problem Statement

• Deterioration

• Load reduction

• Emergency retrofit

• Consideration of different alternatives

• Recommend efficient long term solution

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Background - Location

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Project Location

Drexel University

Project Location

Project Location

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

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

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Project Location

Project Location

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

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Project Location

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

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Superstructure Inspection • Eight W33x130 girders with cross

braces

• Section loss evident on girders

• Rusting of cross braces & bearings

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Substructure Inspection • Both abutments have 3-4” settlement

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• South abutment - minor cracking, delamination of bridge seats

• North abutment - cracked pedestals, pooling water behind bridge seats

Modeling - AutoCAD • Developed a model to import into SAP2000

• Combination of shell elements (bridge deck), frame elements (beams), and rigid links

• Only superstructure

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Modeling - SAP2000 • Current condition

• Application of loads and load cases

• Results:

• L/800 deflection

• Stress

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Utilities • PWD - 20” Main

• PGW - 8” Main

• 10” sewer and 42” storm sewer run under creek - encased in concrete

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Hydraulics and Hydrology

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• Downstream of structure looking downstream

Peak Flow Rates

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Hydrologic Analysis

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Hydraulic Analysis

• Normal Clearance 12’-3”

• 100-yr Clearance 12’-8”

• 500-yr Clearance 15’-4 ½”

• Lift Low Chord 6”

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HY-8 Output Table

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Life Cycle Cost Assessment

• Maintenance Records

• Present Net Worth 20

Pine Road over Pennypack Creek

Wyoming Avenue over Frankford Creek

Do Nothing Alternative

• Structure in a state of deterioration

• Average weight of garbage truck is 32 tons

• Impact on community and environment

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Repair Alternative • Deterioration of structure due to drainage

design flaws

• Replace beam ends, deck, and bearings

• Very expensive to install temporary supports

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Rehabilitation Alternative

• Fix abutment for settlement issues

• Fix drainage issues

• Hydraulic considerations

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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

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Structural Design - Material Considerations

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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

8 - Beam Configuration

• 80’ long

• 8” Deck

• 36” Top Flange

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6 - Beam Configuration • 80’ long

• 8” Deck

• 48” Top Flange

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Schedule to Date

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Expected Future Schedule

Design Budget

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Future - Continuing Work

• Completion of Superstructure design

• Geotechnical Analysis

• Abutment Design

• Transportation Design

• Modeling

• Life Cycle Cost Assessment

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Conclusion

• Bridge is necessary for community

• Recommend replacement alternative

• Modeling

• Accounted for hydrologic impacts

• Structural design calculations

• Looked into life cycle cost assessment

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Questions?

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