Structural Health Monitoring platform presentation at NI week 2016
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ni.com Using Structural Health Monitoring to Reduce Risks for Historical Buildings Gianluca Bacchiega - IRS srl R&D [email protected]
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Transcript of Structural Health Monitoring platform presentation at NI week 2016
ni.com
Using Structural Health Monitoring to Reduce Risks for Historical Buildings
Gianluca Bacchiega - IRS srl R&D
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an Engineering Company
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Qtub MinarNew Delhi (India)
Chiesa San MarcoL’Aquila (Italy)
Ponte del marePescara (Italy)
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PROBLEM STATEMENT Structural design or assessment, Damage detection and assessment, Maintenance and retrofitting of existing structures, structural control during
earthquakes (using semi-active systems). Historic buildings, due to their structural features, construction techniques and
used materials, are particularly vulnerable to earthquake actions;
STRUCTURAL HEALTH MONITORING (SHM)
Continuous or short/medium-term controls of quantities related to the structural behavior connected to the evaluation of their evolution with the passing of time;
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On-site testing and monitoring can be considered key activities for a conscious knowledge-based approach in the conservation of the architectural heritage.
INVESTIGATIONS Structural behaviour definition (ex: validation of behavioural models)
MONITORING Permanent structural controls (continuous on site inspections)
STATIC MONITORING DYNAMIC MONITORING
MONITORING TECHNIQUES
APPLICATION TO CULTURAL HERITAGE STRUCTURES
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Automated system for structural and environmental parameters monitoring and
analysis1. Wired and wireless National Instruments based measurement Hardware
IRS Platform for SHM
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1. Wired and wireless National Instruments based measurement Hardware
2. Custom or Third party components integration (routers, enclosures, industrial PC, sensors)
IRS Platform for SHM
Automated system for structural and environmental parameters monitoring and
analysis
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3. LabVIEW software application developed by IRS for channels configuration, data acquisition and visualization, calculations, log and UMTS/3G data transfer
IRS Platform for SHM
1. Wired and wireless National Instruments based measurement Hardware
2. Third party component integration (routers, enclosures, industrial PC, sensors)
Automated system for structural and environmental parameters monitoring and
analysis
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https://youtu.be/lBXP_9bu9yk
Structural monitoring solutions for ancient and new structures.
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Roman amphitheater: Arena di Verona
GEOMETRIC AND STRUCTURAL FEATURES Ellipse with four focuses (152.43m x 123.23m) Two annular galleries and 73 radial masonry walls Inner masonry: multi-leaf with inner core ‘Wing - Ala’: freestanding structure remaining four
arches of the outer ring, h=30.75 m
HISTORICAL NOTES - PAST INTERVENTIONS I century: construction of the amphitheater XII century: collapse of the outer ring 1939: First intervention on the ‘Wing’: buttresses
construction before WWII
SHM IS AN ALTERNATIVE TO STRENGTHENING
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Architecture of an Integrated Measurement SystemNI CompactDAQ hardware combines a 1-, 4-, or 8-slot chassis with over 50 measurement-specific NI C Series I/O modules and can operate stand-alone with a built-in controller or connect to a host computer over USB, Ethernet, or 802.11 Wi-Fi.
Sensor Measurement Device Software
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DYNAMIC MONITORING16 SINGLE-AXIS
ACCELEROMETERS
STATIC MONITORING20 DISPLACEMENT
TRANSDUCERS
ENVIRONMENTAL MONITORING
4 TEMPERATURE/RH
SENSITIVITY: 1019.4 MV/(M/S²)FREQUENCY RANGE (± 10 %): 0.1÷2000 HZ
RESOLUTION(DA 10,000 HZ): 0.00008 M/S²
OPERATING TEMPERATURE : -45÷82 °C
VOLTAGE: 0÷10 VMEASUREMENT RANGE: 10 CMHYSTERESIS: < 0.01 MMOPERATING TEMPERATURE:-30÷100 °C
VOLTAGE: 0÷10 VPRECISION: +/- 2 % RH +/- 0.2 °CMEASUREMENT RANGE: 0÷100% RH
- 20/0÷50 °C
12 PZ «Arcovoli» of the first level8 PZ inner gallery
Where and what to measure ?
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Family Highlight: Stand-Alone NI CompactDAQEmbedded Measurements and Logging
• >50 I/O modules• Up to 24-bit, Up to 1 MS/s• Dual-core processor• 32 GB nonvolatile storage
• 0 to 55 °C Operating Temp• 5g shock, 30g vibration• Windows or Real-Time OS• LabVIEW and NI-DAQmx
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SHM UNDER OPERATIONAL CONDITIONS: STATIC MONITORING RESULTS
CRAC
K OP
ENIN
G VS
. TI
ME
CRAC
K OP
ENIN
G VS
. TE
MER
ATUR
E
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MAIN SHOCK: 25 JANUARY 2012Prealpi Venete (VR) 2012-01-24 23:54:46Magnitude: 4.2Depth 10.3 KmDistance: 11,5 Km
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50tempo [s]
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
[m/s
^2]
acc7
acc8
acc9
Seismic
event
BASE TOP WINGTOP
AMPHITHEATER
PGA
[m/s2]
Max.
Acc.
[m/s2]
Amplif
.
factor
Max Acc.
[m/s2]
Amplif
.
factor
25/01/20
120,619 1,93 3,11 1,251 2,02
29/05/20
120,078 0,98 12,56 0,40 5,13
Max. Acc. Base = 0,62 m/s2 Max Acc. Wing = 1,93 m/s2
MAIN SHOCK: 29 MAY 2012Pianura Padana-Emiliana (MO) 2012-05-29 07:00:03Magnitude: 5.8Depth 10.2 KmDistance: 75 Km
Max. Acc. Base = 0,08 m/s2 Max Acc. Wing = 0,98 m/s2
COMPARISON: MAX. ACCELRATIONS, AMPLIFICATION FACTORS AND ELASTIC RESPONSE SPECTRA
Amplif. factor = 3,11 Amplif. factor = 12,56
SEISMIC MONITORING : EARTHQUAKE EVENTS
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.MODE
n°
EXP FREQ [Hz]
FEM FREQ[Hz]
1 1,92 1,68
2 2,61 2,42
3 4,83 4,91
4 5,87 5,89
5 6,10 6,20
6 7,10 7,18
A TOOL TO HELP CONSERVATION : MODELING AND NUMERICAL SIMULATION
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A network of ancient monuments and civil structure
in Verona (Italy)
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Do not understimate hardware configurationand sensor placement
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Do take advantage of platform flexibility
Customer asked for non intrusive fissuration monitoring:
We developed a brand new image acquisition application to monitor ancient frescos in Conegliano
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Do work with partners
Civil structure department
Padua University
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CLOUDCOMPUTIN
G
INVESTIGATION PHASE
INTERVENTION PHASE
EVALUATION PHASE
MAINTENANCE PHASE
4. DevelopmentConclusion and perspective: SHM, smart city and IoT
