“UCSD to Build $10 Million Largest Shake-Table in the United States”

Ahmed Elgamal

Department of Structural Engineering

Sky’s the Limit

it’s …. a small world after all …..

Sensors

Kris Pister (UC Berkeley)http://dust-inc.com/

$50 motes today$1 motes in 12 monthsLifetime in months/yearsComm. range of 10m or moreQuality?

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Very Few SensorsExpensive….

Can’t really “SEE” what’s going on

Must Guess:Structural ConditionStresses and StrainsLong Term PerformanceFatigueSeismic ResponseWind ……..

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Vision1000’s of sensors(Sensor Network)

CamerasVibrationTraffic LoadWind SpeedDisplacementStrainTemperatureHumidity……

Construction Joints FrictionDamping

Linear responseNonlinear response

WindTraffic

seismic

UncertaintiesClose-up!

Statistical Inference & Modeling

The Millennium Bridge, London 2000

Works of ARTBeautiful Bridges

Blend with EnvironmentSmooth, Simple, Landmark

New Structural Design ConceptsMechanical Devices (e.g., Dampers)

http://www.arup.com/MillenniumBridge/

Millennium Bridge, London, UK 2000

Toro Peak UCSD Advanced Composites BridgeImperial County (near Palm Springs)

100 accelerometers, strain gages, and video link

Bridge Toro Peak Mt Soledad Anywhere worldwide

Continuous Wireless Monitoring http://hpwren.ucsd.edu/

In-Flight Health Monitoring for Unmanned Air Vehicles

Pumice Microstructure

Predator

GENERAL ATOMICS

Fiber-optic and piezo-electric sensors

• Embedded in composite wings, tails

• Locate flight-induced battle damage

• Algorithm to assess vehicle integrity

• Automated maintenance scheduling

Autonomous Unmanned Air Vehicle(Global Albedo Project)

San Diego to Hawaii

Pre-programmed mission can be monitored/ changed on Iradium satellite network

Instrument: 5 kg

Mission 5000 km

Cruise: 35 m/sec

Condensation Particle Counter

Concentrations of aerosals in clouds

Optical Particle Counter

Concentrations of particles in clouds

Pyronameter

Total solar radiation

Explain how aerosols and clouds regulate the planetary albedo.

San Diego

Hawaii

Numerical Simulation

Visualization

Risk Analysis Decision Analysis

Statistical Modeling Analysis

Image Analysis

Processing

Knowledge-based

Integration

High

Performance

Database

&

Analysis Engine

Integrated Analysis FrameworkRaw Data Archive

Portal Derived Data Archive

Application Interfaces Monitoring Analysis Decision Support

Bridge 1 Bridge 2

Sensor net (real-time data, video streams)

FeaturesAccessibility and deployment (get rid of wires)Low power/scavenging2 way communicationScalable, Robust, Self Healing, …

ResearchDeploy brainpower right on the structure sensor level (smart sensor) sensor cluster (Hub) Analysis/decision-support Servers

InternetSensor Network1000s of heterogeneous sensorsReal time data streams/decision

Single hop,.. multi-hop,… blue tooth, …802.11b, …

Archiving/Analysis/Decision

Sensor net (real-time data, video streams)

DATA

Database

1000 sensor frameworkMetadata modelsAdvanced Query processingData Fusion (heterogeneous information integration) Information acquisition/management/access APIs

Internet

INFORMATION

DATABASE

Data AnalysisModel-Free ApproachesData MiningStatistical pattern recognitionNeural Networks

Data AnalysisHierarchical Model-Based ApproachesAnalytical ModelsFinite Element Models

Statistical Inference and Probabilistic modeling Physics-based model validationFinite element model updatingSystem identification

KNOWLEDGE

UncertaintyMaterial propertiesGeometric propertiesLoading stateStructural ConditionBoundary conditionsModeling approximationsMeasurement errors

Bayesian Statistical InferencePrior

Data-based

Updated

Decision-Making ToolInfra-structure management

Retrofit/strengthening Emergency response

Preventive maintenanceReplacement

Model-Based

Structural health assessmentReliability and Risk evaluation

DECISIONUnder

ConstraintsTechnologyEconomySocietyPolitics

“Beauty”

Proposed Gibraltar 9 mile, $ 15 Billion Mega Bridge

Life-cycle managementEnvironmental ImpactsSustainability

Leonardo da Vinci’s Bridge, Ås, Norway

http://www.vebjorn-sand.com/leonardo.html

500 Years After It Was Designed, Leonardo da Vinci's Bridge Goes UP!

Structural EngineeringScott AshfordJoel P. ConteFrancesco L. di Scalea Ahmed ElgamalMike FraserHong GuanAndre FiliatraultVistasp KarbhariJohn B. KosmatkaPetr KryslJ. Enrique LucoJose RestrepoFrieder Seible Lelli Van Den Einde

Scripps, IGPPHans-Werner BraunV. RamanathanFrank Vernon

It’s a small world after all…..

UCSD, CSEMohan TrivediIngolf KrugerRamesh RaoLarry Smarr

SDSCTony FountainChaitan BaruAmarnath GuptaMike Bailey

CaltransJohn AllisonCliff RobleeCharles Sikorsky

Texas A&MNorris Stubbs

UC BerkeleyGregory FenvesFrank McKennaKris Pister

StanfordKincho LawJames Peng

UC IrvineMagda El Zarki

USCSami Masri

LANLChuck Farrar