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STRUCTURAL HEALTH EVALUATIONS AND MONITORING

Baseline tests allow for detailed structure integrity assessments.

Our structural testing method is non-destructive and rapid and can provide crucial information pertaining to a structure. Using our highly sensitive Larzé sensors and 3D-SAM software, the baseline (frequencies, mode shapes and damping ratios) can be extracted and determined directly from a physical, on-site test. This kind of testing has the following benefits:

  • Based on Sensequake's highly sensitive Larzé sensors

  • Non-destructive testing only taking a few hours during regular operations

  • In-depth data analysis using Sensequake's 3D-SAM software

  • Prove integrity of structure using real data

  • Comparative baselines compared over time or with Sensequake's database of healthy baselines to detect and locate damages early

  • No structural finite-element models or drawings needed

  • In the case of a retrofit, other engineers can use the baseline results to calibrate their theoretical models to reduce cost and increase reliability

The process gives an in-depth look at the structure at that point in time and can be used in conjunction with previous and future tests to monitor changes in structural properties over time. This can be used to calibrate numerical models, find hidden defects within the structure or used to periodically monitor the structure's health as it ages or if damage occurs.

Baseline
Test

   •   Accurate natural frequency derivation

   •   Mode shape rendering and damping ratio derivation

   •   Accurate derivation of higher modes and torsional

       modes of irregular structures

   •   This test creates a baseline that may be used for

       future comparisons and structural health monitoring

   •   Comparisons with the Sensequake database of

       healthy baselines of similar structures

   •   Detailed report of findings by our team of experts

   •   Obtained data can be used to calibrate finite element

       models, increasing their reliability and creating

       more cost-efficient retrofit schemes

Non-destructive Condition Assessments

Our technology can be applied to highly specific project needs:

   •   Assessing in-plane flexibility and properties of

       building floors, roofs and walls

   •   Specialized analysis for specific structural

       components such as joints to understand the true

       behaviour of the structure

   •   Identify integrity discontinuity within structures or

       between structural blocks and integrity of connected

       structures

    •  Evaluating the required net-gap between

       structural blocks to mitigate the seismic impact

       hazard

   •   Lateral stiffness derivation per story

   •   Detection of soft-stories

   •   Find resonance frequencies of floors and

       machinery to mitigate excessive floor vibrations

Periodic
Monitoring

After an in-depth baseline test, complete or simplified tests are done every few months, after a natural disaster, after retrofitting or during standard visual inspections. These can be compared to the initial conditions to view any unseen changes in the structure's integrity and to detect damage.

Periodic baseline monitoring is especially critical for bridges. Baselines and advanced comparative analyses through winter and summer baseline tests can detect structural weaknesses which are invisible to traditional inspection methods.

Permanent

Monitoring

Permanent structural health monitoring solutions using our ShakeLog System can detect damage and assess integrity over time by monitoring the following:

• Simplified threshold alarms

• Structural frequency

 

• Deriving mode shapes

• Modal curvature comparisons

• Structural drift computation

• Feeding data into external or pre-existing

  systems

• Custom sensing parameters

Optimizing engineering design with REAL testing results

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Contact us today for more information on how we can help your projects

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