Structural health monitoring and concept of sustainability in engineering
description
Transcript of Structural health monitoring and concept of sustainability in engineering
![Page 1: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/1.jpg)
Structural health monitoring and concept of sustainability in
engineering
Princeton University, Supélec, Ecole Centrale Paris and Alcatel-Lucent Bell Labs Workshop on Information, Energy and Environment, June 23-24, 2008
Presented by Branko GlišićSMARTEC SA, Switzerland
![Page 2: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/2.jpg)
Outline
• Challenges of modern world
• Concept of sustainability in civil engineering
• Structural health monitoring as a support to concept of sustainability
• Examples from practice
• Closing remarks
![Page 3: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/3.jpg)
• Protection of natural environment• Maintenance of built environment• Approaching the lifetime limits of
civil infrastructure • Mitigation risks from natural or
human-made disasters• Shortage of fresh water• Shortage of energy• …
Challenges of modern world
![Page 4: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/4.jpg)
Concept of sustainability• New construction materials and new structural
systems to be developed and applied• New structures to be performance oriented
and old structures rehabilitated or recycled• Long-term maintenance programs are to be
implemented• Implementation of structural health monitoring
as a tool providing objective and reliable real-time information on structural performance and condition
![Page 5: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/5.jpg)
MONITORING =Periodical or continuous record ofparameters over a certain periods(long-term, short-term or comb.)
PARAMETERS =
Mechanical (strain, curvature,…)Physical (temperature, humidity,…)Chemical (PH, CL-, SO3
-, …)Other
LEVEL =MaterialLocal structuralGlobal structural
Monitoring and monitored parameters
![Page 6: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/6.jpg)
Pain Diagnosis CureExams
Monitoring Inspection RepairDiagnosis
SHM – nervous system of structure
![Page 7: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/7.jpg)
Why monitoring?
• Increase safety preserve human lives, environment and goods
• Management based on objective and reliable data decrease of economic losses due to repair, maintenance, reconstruction and for users
• Better exploitation of traditional materials, better exploitation of existing structures reducing of construction and exploitation costs
![Page 8: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/8.jpg)
Why monitoring (continued)?
• New materials, new construction technologies, new structural systems are used increase of knowledge, control of design, verification of performance, creation and calibration of models
• Plan and reduce life-cycle operation costs
• Limit social, economical, environmental and aesthetical impact in case of deficiency
• Supports concept of sustainable engineering
![Page 9: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/9.jpg)
Fiber Optic methods for SHM, FESHM and Integrity Monitoring
SHM Methods - Challenge / MotivationBest monitored structure Concept of nervous system directly
applicable to the structures?Sensors everywhere
Complex, complicated and expensive!
![Page 10: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/10.jpg)
Finite Element SHM concept
“Simple” topology
“Parallel” and “crossed” topologies
“Parallel” and “triangular” topologies
“Parallel” topology
Tilt
m
eter
• Structure is divided into parts called cells
• Results obtained from each cell are linked, using appropriate algorithms, in order to retrieve the global structural behavior
• Each cell is equipped with long-gage fiber optic sensor combination, called a topology, which in the best manner corresponds to the expected strain field in the cell
![Page 11: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/11.jpg)
FESHM, different types of structures
![Page 12: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/12.jpg)
Integrity monitoring
Average strain []
Event that generate local strain change
Expected average strain without damage
• Distributed fiber optic sensing provides for integrity monitoring – event (e.g. damage) detection and localization
Distributed deformation sensors for integrity monitoring
Event detection and localization
![Page 13: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/13.jpg)
Integrity monitoring applications Distributed deformation sensor for integrity monitoring
Distributed sensors in sections, along vaults,
in boreholes
Distributed deformation and temperature sensor
Seepage Overflow
Slow local movement in slope
![Page 14: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/14.jpg)
Diff
eren
t m
odel
s vs
. m
onito
ring
SHM example – I10 bridge (US)High performance pre-stressed concrete (new material)Model? Performance?
Performance from monitoring
![Page 15: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/15.jpg)
Recycled pipes as pilesPerformance? Safety?
SHM example – Swiss Expo ‘02
C.M.P.
![Page 16: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/16.jpg)
Old structure (1939) – fatigue cracks in steelMaintenance, in-time repair – lifetime extension until 2020
SHM example – Gota bridge (SE)
Integrity monitoring over 5 main girdersBridge open
Position
Ave
rag
e st
rain
[ ]
![Page 17: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/17.jpg)
The largest hydropower plant in Latvia Risk of shortage of energy in case of structural failureDisastrous impact to environment
SHM example – Pļaviņu hes (LV)
Ear
ly w
arni
ng,
in-t
ime
mai
nten
ance
![Page 18: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/18.jpg)
SHM example – Prezzo (IT)Village built on landslide – risk for population and goods
Land sliding accelerated with rain and snow melting
Monitoring for mitigation risk
![Page 19: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/19.jpg)
SHM example – ZEM (EU)Composite onboard storage tank for gas powered vehiclesLow weight/consumption/emissionsSafety/periodic controls/maintenance
![Page 20: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/20.jpg)
SHM example – Vienna water supplyCity’s 2nd water supply line, aged (built in 1900)
Cracks present in tunnel, important losses of water
Monitoring to improve water management
![Page 21: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/21.jpg)
Gas tank construction in a salt mine near Berlin
Cleaning of salt mine with hot water, evacuation of the brine using 55 km pipeline
Risk of structural failure / 3rd party interference / leakage
Safety, ecological consequences, interruption of construction process, delay and economical losses
SHM example – Brine pipeline (DE)
Source: GESO, Jena, Germany
![Page 22: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/22.jpg)
Acknowledgements
• New Mexico State University (US)• Swiss Expo ’02 (CH)• Norwegian Geotechnical Institute (NO)• Trafikkontoret (SE)• Latvenergo, VND2 and Aigers (LV)• EU Commission and ZEM partners (EU)• Vienna Water Supply and RISS (AT)• GESO (DE)
![Page 23: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/23.jpg)
Instead of conclusions
Butterflies and dinosaurs date from the same epoch…
Recent research leads scientists to the conclusion that butterflies have survived because they have been
equipped with better sensors than dinosaurs, and thus are able to adapt to environmental changes.
Should we build structures with a butterfly or dinosaur destiny?
![Page 24: Structural health monitoring and concept of sustainability in engineering](https://reader036.fdocuments.net/reader036/viewer/2022062519/56814cf7550346895dba032a/html5/thumbnails/24.jpg)