Bartoli TechApps for Preserving Managing - Drexel …€¦ · Title of Overall Presentation Technologygy pp g Applications for Preserving and Managing Historic Landmark Bridges Aktan,

Title of Overall Presentation

Technology Applications for Preserving gy pp gand Managing Historic Landmark Bridges

Aktan, Moon,LowdermilkBartoli Yarnold Dubbs MinaieBartoli, Yarnold, Dubbs, Minaie


Risk and Decision Information TechModeling/SimulationModeling/SimulationExperimental Arts

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TPB BackgroundTPB Background• Location: Philadelphia (Tacony), PA to Palmyra, NJ (USA)

O B li t C t B id C i i• Owner: Burlington County Bridge Commission• Built: 1929• Master Builder: Ralph Modjeski• Bridge Total Length: 3,659’ (1115 m)

Tied Arch Span (537’)

Rolling Bascule Span (260’)

Location Map

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3-Span Half Through Truss

(245’ spans)

3-Span Half Through Truss(245’ spans)


Stakeholders: Social and Institutional SystemsStakeholders: Social and Institutional Systems

AUDIENCESM di

ACTIVE INTERESTSNear Neighbors-community members

Palmyra Cove-Educators-Volunteers

General Public Media

Other Bridge O

TRANSACTORSOperations -Bridge and toll plaza operators-Police

Administration-Human Resource-Clerical

-commuters-tax payers

Contractors

-Event Staff-Members Academic and

Research Entities- Learning Bridge

Owners

DECISIONMAKERS

El t d F h ld (5) A i d Offi i l

-Police-Maintenance-Information Technology

FinancialStaff-CFO

-Communications-Economic Development

Bridges

Elected Freeholders (5)Inspectors & RegulatorsConsultants-Pennoni-Solicitor

Appointed Officials-Executive Director

-Chairman-Vice Chairman-Commissioner

CFO-Purchasing-Payroll-Accounts-Tolls

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Bridges


St-Id Based on Ambient MonitoringSt-Id Based on Ambient Monitoring

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TPB ARCH INSTRUMENTATIONTPB ARCH INSTRUMENTATION


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ARCH SPAN: FREQ/MODES CORRELATIONARCH SPAN: FREQ/MODES CORRELATION

1st Lateral 2nd Bending

ModeShape PolyMAX (Hz) Strand7 (Hz)ModeShape PolyMAX (Hz) Strand7 (Hz)

1st Lateral 0.773 0.8647

1st Torsion

2nd Bending 1.254 1.118

1st Torsion 1.661 1.769

1st Bending 1.7506 1.783

2nd Torsion 2.6979 2.587


Preliminary Instrumentation for Intrinsic ActionsPreliminary Instrumentation for Intrinsic Actions

Legend:VW Strain Gages

VW Displ Gage

VW Tilt SVW Tilt Sensor

Tacony-Palmyra Bridge Arch Span

East End

West End

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Installation PhotosInstallation Photos

VW Strain GageVW Displacement Gage

10Expansion Bearing Lower Chord (Inside View)


Temperature GradientsTemperature Gradients

Infrared Camera Image of Lower ChordInfrared Camera Image of Lower Chord– Illustrates transverse temperature gradient

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Evening Temperature VariationEvening Temperature VariationEvening Steady-State Condition

70.9 ○F71.2 ○F

– Temperature Variation +/- 1○F

70.9 F71.2 F

70.9 ○F

71.3 ○F

71.9 ○F

W th

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70.7 ○F71.1 ○F

71.4○F

Weather Station71 ○F


Structural Identification of the Bascule SpanStructural Identification of the Bascule Span Mechanical System

Bascule Opening

Force Couple

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Bascule Span ClosingBascule Span Closing

3-Hinge Arch Under LLg

14 Center Bearing

Shear Lock


Preliminary Bascule InstrumentationPreliminary Bascule Instrumentation

Instrumentation (Phase 1)• 22 electrical resistance strain gages• 4 vibrating wire strain gages• 2 Tilt Sensors (with temperature)• Weather Station

Truss B Upper Chord Strain Gages

T A L

DAQ Setup using National Instruments Compact RIO

Truss A Lower Chord Strain Gages (EF)

Truss B Lower

p

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Chord Strain Gages (EF)Tiltmeter


Typical Lower Chord Opening ResponseTypical Lower Chord Opening ResponseTacony-Palmyra Bridge

S d

High Speed Strain Gage Results During

Bridge Opening (Lower

d

Stage d

g p g (Chord)c

Stages of Bridge Openinga – Bridge in closed position (no traffic)b – Bridge release (cantilever condition)c – Bridge in open position (~53 degrees)

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ab

e fd – Bridge in fully open position (~67 degrees)e – Bridge back in cantilever condition (prior to close)f – Bridge in closed position (prior to traffic)


SCADA Server & HistorianSCADA Server & Historian

Tacony-PalmyraBridge

Live Web Portal

Automatic SCADA Server &

Historian Playback ProgramReporting Historian Playback Program

17 E-mail & Text Alerts Data Storage


Live Web PortalLive Web Portal

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Playback ProgramPlayback Program

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Smart Bearings DesignSmart Bearings Design

• Reinforced neoprene expansion bearingsp p g• Bearing requirements

– 400 kip tower span capacity– 200 kip truss span capacity

• Sensor requirements– High capacityHigh capacity – Low profile– Shunt calibrated

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FE AnalysisFE Analysis

• Preliminary design utilized 4 high capacity load cellsy g g p y– Bearing assembly needed to be modeled in 3D FE software to analyze

for load distribution and stresses within the bearing plates

– Bearing needed to be redesigned to reduce the stresses within the bottom plate

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TestingTesting

20 000 lb Axial Force 113 500 lb Axial Force

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20,000 lb Axial Force3,500 lb Shear Force

113,500 lb Axial Force20,000 lb Shear Force


CONCLUSIONSCONCLUSIONS• Successful technology applications require the right

paradigms and integration of the proper tech tools forparadigms and integration of the proper tech tools for transforming current empirical decision making into a balanced mechanistic/heuristic one;

• We are and will remain in a research-demonstration mode for some time before we may standardize tech leveraging and the applications of technology toolsleveraging and the applications of technology tools

• Infrastructures are highly complex systems governed by various human systems, especially policy and politics. Tech leveraging has to be designed accordingly

• There will always be abundant uncertainty, therefore we need to leverage heuristics to complement mechanisticneed to leverage heuristics to complement mechanistic, data driven decisions.

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Bartoli TechApps for Preserving Managing - Drexel …€¦ · Title of Overall Presentation Technologygy pp g Applications for Preserving and Managing Historic Landmark Bridges Aktan,