Structural Health Monitoring

Structural Health Monitoring (SHM) is the process of assessing the state of health (e.g., damage) of instrumented structures from measurements. The goal of SHM is to improve safety and reliability of infrastructure systems by detecting damage before it reaches a critical state and allow rapid post-event assessment. 

Early detection of damage can save money and lives! Traditionally, damage detection is performed through periodic maintenance and post-event visual inspection by qualified personnel. Visual inspections impose high costs and inconvenience on structural system owners and users alike. In buildings, for instance, visual inspections may require the removal of non-structural components such as ceiling tiles, partition walls, and fire proofing.  In addition, such resources (qualified inspectors) may not be immediately available after a damaging event, especially for dense urban areas, prolonging expensive downtime.

Kinemetrics' integrated SHM system solution offers precise information which helps engineers and managers assess the state-of-health of their structures, and if needed, target specific regions to inspect. 

SHM systems add unique value to a structure by converting it into a ‘smart’ structure with state    -of-the-art sensing technology – similar to ‘green value’ obtained by achieving LEED certification (Leadership in Energy and Environmental Design)
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Key Features

  • Offers real-time SHM for critical infrastructure

  • Implements state-of-the-art approaches for damage detection, location and assessment

  • Extends lifetime and save money by detecting damage before reaching critical state
     
  • Reduces downtime by targeting inspections to suspect regions rather than entire structure

Applications

  • Events: Earthquakes, winds, ambient vibrations, blasts, operational loads, fatigue, extreme weather 
     
  • Buildings: high-rises, hospitals, towers, arenas/stadiums, historical structures 
     
  • Lifeline systems: communication towers, power plants, dams, pipelines, water plants 
     
  • Transportation: bridges, airports, ports, rail and transit
     
  • Other structures: off shore platforms, wind turbines, tunnels

Approaches

  • Automated system identification and monitoring modal properties (e.g., natural frequencies, damping ratios, mode shapes) and their derivatives

  • Parametric and analytical (e.g., finite element) model updating

  • Monitoring important response quantities (e.g., inter-story drift, roof drift) for exceedance of specific performance levels or probabilistic limits based on specific damage state measures (e.g., fragility functions)

  • Wave propagation and wavelet transforms

  • Multiple sensors: acceleration, velocity, displacement, tilt, strain, force, pressure, wind, GPS, temperature, humidity, corrosion, etc.

     




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