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Sky’s the Limit
“UCSD to Build $10 Million Largest Shake-Table in the United States”
Ahmed Elgamal
Department of Structural Engineering
Sensors
it’s ….
a small world after all
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Kris Pister (UC Berkeley)
http://dust-inc.com/
$50 motes today
$1 motes in 12 months
Lifetime in months/years
Comm. range of 10m or more
Quality?
Very Few Sensors
Expensive….
Must Guess:
Structural Condition
Stresses and Strains
Long Term Performance
Fatigue
Seismic Response
Wind …
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Can’t really “SEE”
what’s going on
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Cameras
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Vibration
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Traffic Load
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Wind Speed
Displacement
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Strain
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Temperature
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Humidity
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1000’s of sensors
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Vision
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Construction Joints
Friction
Damping
Linear response
Nonlinear response
Wind
Traffic
seismic
Close-up!
Uncertainties
Statistical Inference
& Modeling
The Millennium Bridge, London 2000
Works of ART
Beautiful Bridges
Blend with Environment
Smooth, Simple, Landmark
New Structural Design Concepts
Mechanical Devices (e.g., Dampers)
http://www.arup.com/MillenniumBridge/
Millennium Bridge, London, UK 2000
Toro Peak
UCSD Advanced Composites Bridge
Imperial 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
Fiber-optic and piezo-electric sensors
• Embedded in composite wings, tails
• Locate flight-induced battle damage
• Algorithm to assess vehicle integrity
• Automated maintenance scheduling
Predator
Pumice Microstructure
GENERAL ATOMICS
Autonomous Unmanned Air Vehicle
(Global Albedo Project)
Explain how aerosols
and clouds regulate the
planetary albedo.
Condensation Particle
Counter
Concentrations
of aerosals in
clouds
San Diego to Hawaii
San
Diego
Optical Particle Counter
Concentrations
of particles in
clouds
Hawaii
Pyronameter
Total solar
radiation
Instrument: 5 kg
Mission 5000 km
Cruise: 35 m/sec
Pre-programmed mission can
be monitored/
changed on
Iradium
satellite
network
Bridge 1
Bridge 2
Sensor net (real-time data, video streams)
Integrated Analysis Framework
Numerical Simulation
Processing
Raw Data Archive
Knowledge-based
Image Analysis
Integration
High
Visualization
Statistical Modeling Analysis
Performance
Database
&
Risk Analysis
Decision Analysis
Analysis Engine
Derived Data Archive
Application Interfaces
Portal
Monitoring
Analysis
Decision Support
Sensor Network
1000s of heterogeneous sensors
Real time data streams/decision
Internet
Single hop,.. multi-hop,… blue tooth, …802.11b, …
Features
Accessibility and deployment (get rid of wires)
Low power/scavenging
2 way communication
Scalable, Robust, Self Healing, …
Research
Deploy brainpower right on the structure
sensor level (smart sensor)
sensor cluster (Hub)
Analysis/decision-support Servers
Archiving/Analysis/Decision
Database
1000 sensor framework
Metadata models
Advanced Query processing
Data Fusion (heterogeneous information integration)
Information acquisition/management/access APIs
Internet
DATA
Sensor net (real-time data, video streams)
Data Analysis
Hierarchical Model-Based Approaches
Analytical Models
Finite Element Models
INFORMATION
Data Analysis
Model-Free Approaches
Data Mining
Statistical pattern recognition
Neural Networks
DATABASE
Statistical Inference and Probabilistic modeling
Physics-based model validation
Finite element model updating
System identification
KNOWLEDGE
Uncertainty
Material properties
Geometric properties
Loading state
Structural Condition
Boundary conditions
Modeling approximations
Measurement errors
Bayesian Statistical Inference
Prior
Data-based
Updated
DECISION
Under
Constraints
Technology
Economy
Society
Politics
“Beauty”
Decision-Making Tool
Infra-structure management
Retrofit/strengthening
Emergency response
Preventive maintenance
Replacement
Model-Based
Structural health assessment
Reliability and Risk evaluation
Proposed Gibraltar 9 mile, $ 15 Billion Mega Bridge
Life-cycle management
Environmental Impacts
Sustainability
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!
It’s a small world after all…..
UC Berkeley
Gregory Fenves
Frank McKenna
Kris Pister
Structural Engineering
Scott Ashford
Joel P. Conte
Francesco L. di Scalea
Ahmed Elgamal
Mike Fraser
Stanford
Hong Guan
Kincho Law
Andre Filiatrault
James Peng
Vistasp Karbhari
John B. Kosmatka
Scripps, IGPP
Petr Krysl
Hans-Werner Braun
J. Enrique Luco
V. Ramanathan
Jose Restrepo
Frank Vernon
Frieder Seible
Lelli Van Den Einde
UC Irvine
Magda El Zarki
USC
Sami Masri
Texas A&M
Norris Stubbs
UCSD, CSE
Mohan Trivedi
Ingolf Kruger
Ramesh Rao
Larry Smarr
Caltrans
John Allison
Cliff Roblee
Charles Sikorsky
SDSC
Tony Fountain
Chaitan Baru
Amarnath Gupta
Mike Bailey
LANL
Chuck Farrar