signalling monitoring

1. Definition:
In-service evaluation of structural health status
by measuring key structural and environmental
parameters on a continuous base at real time.
Purposes of SHM: Detect structure damages
•Strength of constituent materials
•Safety, Safety, Safety
• Provide maintenance and rehabilitation advices
• Improve design guidelines
• Disaster mitigation
What is Structural Health Monitoring?

2. Current Safety Assurance Practices
• Design with large safety factors-overdesign
• Design for damage tolerance
– Life prediction (material damage, fracture mechanics)
– Quality control (material processing, manufacturing,
assembly)
– Accurate specification of operational conditions
• Periodic Inspection
– Manual
– Nondestructive Evaluation (visual, ultrasound)

3. Infamous Disasters due to Structural
Failures
Question: If all structures are designed
properly, do we still need Structural Health
Monitoring?