for Structural Health Monitoring and Bridgessp.maintenance.transportation.org/Documents/2015 Meeting...
Transcript of for Structural Health Monitoring and Bridgessp.maintenance.transportation.org/Documents/2015 Meeting...
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Intro and Overview for Structural Health Monitoring and Bridges
Christopher Kavars SENSR, LLC.
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Structural Health Monitoring – Los Alamos
The process of implementing a damage identification strategy for aerospace, civil and mechanical engineering infrastructure. Damage is defined as changes to the material and/or geometric properties of these systems, including changes to the boundary conditions and system connectivity, which adversely affect the system’s performance.
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Structural Health Monitoring - Origins
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Structural Health Monitoring – Birthing Environment
• - Heavy use of instrumentation and analysis to determine performance
• - Short to medium service life - Mass-produced products • - Established life-cycle management programs
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Structural Health Monitoring – Contributors
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Structural Health Monitoring – 40 years of Evolution
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Structural Health Monitoring – Bridge Environment
- Very long service life -- Most damage progresses slowly and indications of damage are usually visual. - Highly varied population - Sensor-based damage detection techniques are not fully developed or accepted.
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Structural Health Monitoring – Bridge Monitoring
Measure Meaning Result
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Structural Health Monitoring – Bridge Monitoring
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Structural Health Monitoring – Bridge Monitoring
- Developing applications
- Scaling applications
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Bridge Monitoring – scaling SHM programs
- A problem may exist but confirmation is
difficult to determine. - A problem may develop if a specific set
of driving circumstances occur
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Structural Health Monitoring – Substructure Monitoring
Scour, collision detection, settlement / subsidence, masonry crack propagation, adjacent construction damage, and bearing functionality.
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Structural Health Monitoring – Deck and deck support monitoring
Vibration monitoring, crack propagation, strain monitoring, load monitoring and chloride intrusion
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Structural Health Monitoring – 3 requirements for success.
1. Risk analysis has to show the need.
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Structural Health Monitoring – 3 requirements for success.
2. Parameter that assessments can be based upon.
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Structural Health Monitoring – 3 requirements for success.
3. Know what to do when measurements or trends are realized.
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LADOTD – Bayou Corne Sinkhole
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LADOTD – Bayou Corne Sinkhole
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LADOTD – Bayou Corne Sinkhole
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LADOTD – Bayou Corne Sinkhole
3 – axis accel 2 – axis tilt 1 – temp
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LADOTD – Bayou Corne Sinkhole
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Scaling Bridge Monitoring programs
- Detection and notification of an undesirable event – Collision - Detection and notification of an undesirable behavior – pier tilt related to scour
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Structural Health Monitoring
Thank You