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Our technology adds reliability to the widely used assumption based finite element models are widely used in structural engineering practices by bringing real data from sensors into the hands of engineers. The process has been validated on many occasions and adds essential information to assumption based models. Sensequake technology is the result of many years of R&D at McGill University and Sensequake, where it has been used to assess many landmark buildings and bridges across Canada.

 

Our Method

 

Highly sensitive, wireless vibration sensors are temporarily deployed on structural platforms to measure minute vibrations from micro-tremors, wind, traffic and human activity. These sensors are placed at carefully picked locations across the structure to deliver the most pertinent information. Sensing tests take a few hours and do not interrupt the building’s usual operations.

 

SENSOR POSITIONS

 

Captured data is analyzed with our advanced algorithms to generate the modal properties (natural frequencies, damping ratio and mode shapes) of the structure. These act as the structure’s baseline or signature, which is essential for monitoring the health and integrity of structures. By comparing future measurements to this baseline, the user can track  future changes and damages to the structure. Sensequake's 3D-SAM software utilizes the baseline, the building's other parameters and its proprietary patented algorithms to perform seismic and time history analysis.

 

Our 3D-SAM software can rapidly run time history analysis on as many ground motions as needed and provides you with response histories and maximum global seismic demands based solely on sensing results without any finite element models. All results generated by this technology are directly based on sensing test results and, therefore, can be used to calibrate and increase the reliability of finite element models.

 

 

TECHNOLOGY PROCEDURES

 

Our Software

 

Sensquake's patented 3D-SAM software brings real sensing data to structural health monitoring

TM

3D-SAM can improve the reliability of your

finite element models, directly assess structural integrity and monitor the health of all types of structures.

Sensequake technology can be used for seismic and time history analysis. Our software can quickly run time-history analysis on as many ground motions as needed. It also provides you with response histories and maximum global seismic demands solely based on the sensing test results without the need of any finite element models.

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Results

 

• Natural frequencies from sensing test

• Damping ratios

• Mode shapes

• Optimized conversion of flexible modes to rigid ones

• Assessing the interaction between structural blocks

• Structural health monitoring through periodic testing

• In-plane assessment of flexibility of floors and roofs

• Specialized analysis and sensing tests for specific structural components to understand their true behaviour

Modal Identification

 

Structural Seismic Assessment

• Engineering demand parameters 

 

• Response histories such as drift ratios, displacements, accelerations, forces, base shear and overturning moments at any location and direction of the building

• Predicting the global and component performance level to future earthquakes by comparing the demands with specified thresholds in the codes.

Non-Structural Seismic Assessment

• Displacement response spectra at any location of the building

• Acceleration response spectra at any location of the building

• Predicting the global and component performance level to future earthquakes by comparing the demands with specified thresholds in the codes.

Benefits

• 1-day, non-destructive sensing tests

• Provides structural baselines and health monitoring based only on sensing tests

 

• Time-history analysis in a few minutes without finite element models

 

• Three-dimensional seismic analysis

• Simulation and results of multiple earthquakes of different magnitudes

• Application of earthquakes in any direction

• Assessment of irregular buildings 

• 3D-SAM results can calibrate existing finite element models

• Find hidden defects and undocumented structural defects

Sensors

 

Vibrational sensors are the heart of structural health monitoring and getting the data needed for reliable modelling and proper result-generation. Achieving the best results starts with selecting the best sensor.

Our Larzé Vibration System has been developed in-house in order to perform our state of the art ambient vibration test. Once deployed, the sensing test is initiated and monitored by a custom phone application. The data is sent to the cloud for analysis by our team of experts and the results are sent back to you.

The Sensequake Larzé

Vibration System

seismic assessment

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Our Larzé sensors are a state of the art solution for ambient vibration tests and monitoring and can be set up for temporary or permanent sensing tests. It features:

   •   Six channels of velocity and acceleration data

   •   Unlimited network size

   •   Microsecond precision synchronization

   •   Stay synchronized without sensor communication -

       ideal for large civil engineering structures

   •   Cloud data management

   •   Easy access through a phone app or web portal

   •   Compact size

   •   Hybrid wired or wireless connection

Please contact us for more information

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