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STRUCTURAL HEALTH   MONITORING     M. Mayur     S.I.E.T.K       Puttur.
Contents:   Definition…   What is SHM?   Pattern of SHM   Importance of SHM   Components   Conclusion.
Structure:
Types:
Damages Due to:   mismanagement in construction,   lack of quality in control,   temperature conditions……   Damages su...
Damage:   Changes in:           geometric properties ,           boundary conditions ,           system connectivity… ...
What should we do?
In 19th Century:   rail road wheel tappers - used the sound of a    hammer when striked against the wheel of    train to ...
   Then, these techniques are utilized to detect    the damages in the structure, and then a new    field emerged namely ...
What is Structural HealthMonitoring?   The process of implementing a damage    detection and characterization strategy fo...
Pattern of SHM:   Operational Evaluation,   Data Acquisition and Cleansing,   Feature Extraction & Data Compression, an...
Operational Evaluation:     Under which operations,       the   structure      services and damage.     Life safety and ...
Data Acquisition:    This parts deals with:         number of sensors,         types of sensors,         selecting the...
Data Normalization:   separating changes in sensor readings from    damage   to   those   caused   by   varying    operat...
Feature Extraction:   Feature   extraction   gives   the   technical    literature to distinguish between damaged and    ...
Statistical ModelDevelopment:   Statistical Model Development is used for    determining   damaged   and   undamaged    s...
Importance of SHM:   SHM improves - safety & functionality of    structures.   Monitoring - develop innovative design   ...
   Embedment of sensors during construction    and measurement of structural responses    during service will enable cond...
Saptha Suthras:   All materials have inherent laws or defects   The assessment of damage requires a comparison    betwee...
   Sensors cannot measure damage. Feature extraction    and statistical classification is required to convert    sensor d...
   There is a trade-off between the sensitivity to    damage of an algorithm and its noise    rejection capability.     ...
Components:   Structure   Sensors   Data acquisition systems   Data management   Data transfer   Data interpretation...
Why SHM?
Sensors:   Sensors measure the physical quantity of damage and    sends it to computer.       Good Sensor :            I...
DA systems:   Data acquisition is the process of sampling signals    that converts the resulting samples into digital    ...
   Data management system manipulates the    management of data obtained from sensors.   Data transfer systems are used ...
SHM monitoring for a dam in China:
Conclusion:   There is always no particular    conclusion for any technology    related concept.   But, this concept end...
Thank you...
Structural Health Monitoring
Structural Health Monitoring
Structural Health Monitoring
Structural Health Monitoring
Structural Health Monitoring
Structural Health Monitoring
Structural Health Monitoring
Structural Health Monitoring
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Structural Health Monitoring

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Structural Health Monitoring

  1. 1. STRUCTURAL HEALTH MONITORING M. Mayur S.I.E.T.K Puttur.
  2. 2. Contents: Definition… What is SHM? Pattern of SHM Importance of SHM Components Conclusion.
  3. 3. Structure:
  4. 4. Types:
  5. 5. Damages Due to: mismanagement in construction, lack of quality in control, temperature conditions…… Damages such as surface cracks, segregation, settlements etc…
  6. 6. Damage: Changes in:  geometric properties ,  boundary conditions ,  system connectivity… which adversely affect the structure’s performance.
  7. 7. What should we do?
  8. 8. In 19th Century: rail road wheel tappers - used the sound of a hammer when striked against the wheel of train to detect the damage. In rotating machinery, vibration monitoring is used as performance evaluation technique.
  9. 9.  Then, these techniques are utilized to detect the damages in the structure, and then a new field emerged namely Structural Health Monitoring.
  10. 10. What is Structural HealthMonitoring? The process of implementing a damage detection and characterization strategy for engineering structures is referred as Structural Health Monitoring. (in short…)
  11. 11. Pattern of SHM: Operational Evaluation, Data Acquisition and Cleansing, Feature Extraction & Data Compression, and Statistical Model Development for Feature Discrimination
  12. 12. Operational Evaluation:  Under which operations, the structure services and damage.  Life safety and economic justification for performing SHM.  Limitations of acquiring data in SHM.
  13. 13. Data Acquisition:  This parts deals with:  number of sensors,  types of sensors,  selecting their excitation methods &  data storage techniques.
  14. 14. Data Normalization: separating changes in sensor readings from damage to those caused by varying operational & environmental conditions.
  15. 15. Feature Extraction: Feature extraction gives the technical literature to distinguish between damaged and non damaged items of buildings.
  16. 16. Statistical ModelDevelopment: Statistical Model Development is used for determining damaged and undamaged structures.
  17. 17. Importance of SHM: SHM improves - safety & functionality of structures. Monitoring - develop innovative design methodologies - timely warning of impending failures. Structural condition monitoring and assessment are required for timely and cost-effective maintenance.
  18. 18.  Embedment of sensors during construction and measurement of structural responses during service will enable condition assessment and remaining life estimation easy and convenient Monitoring scheme helps to gather data on the realistic performance of the structures, which in turn will help to design better structures for the future.
  19. 19. Saptha Suthras: All materials have inherent laws or defects The assessment of damage requires a comparison between two system states Identifying the damage differs than the type and vulnerability of the damage, which requires skill.
  20. 20.  Sensors cannot measure damage. Feature extraction and statistical classification is required to convert sensor data to damage information. Damage information depends upon the intelligence of sensor’s feature extraction.
  21. 21.  There is a trade-off between the sensitivity to damage of an algorithm and its noise rejection capability. DS α 1/RE (damage size) α (1/ frequency range of excitation)
  22. 22. Components: Structure Sensors Data acquisition systems Data management Data transfer Data interpretation and diagnosis
  23. 23. Why SHM?
  24. 24. Sensors: Sensors measure the physical quantity of damage and sends it to computer. Good Sensor :  Is sensitive to the measured property  Isinsensitive to any other property likely to be encountered in its application  Does not influence the measured property.
  25. 25. DA systems: Data acquisition is the process of sampling signals that converts the resulting samples into digital numeric values.  Sensors  Signal conditioning circuitry  Analog-to-digital converters
  26. 26.  Data management system manipulates the management of data obtained from sensors. Data transfer systems are used to transfer the data to systems which help in predicting the failures of structures.
  27. 27. SHM monitoring for a dam in China:
  28. 28. Conclusion: There is always no particular conclusion for any technology related concept. But, this concept ends with conclusion with that even structures have life and we (civil engineers) are here to protect it from various diseases.
  29. 29. Thank you...

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