FEATURED BY AUTODESK
"[Sensequake] is a great example of how building information modelling, the Internet of Things and the power of cloud computing will help engineering deliver high-value services to their clients... in a way that continues to make them relevant and competitive."
Sensequake technology adds reliability to assumption-based finite element models that are widely used in structural engineering practices by bringing real data from sensors into the hands of engineers. The process has been validated through many landmark projects and adds essential information to assumption-based models.
Our Method
Highly sensitive, wireless vibration sensors are temporarily deployed on a structure 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 building 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 a 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 changes and damage. Sensequake's 3D-SAM software utilizes the baseline, other simple building parameters and proprietary patented algorithms to perform sensing-based seismic and time history analysis.
3D-SAM software can rapidly run time history analysis on as many ground motions as needed and provides the 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 the sensing test 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 a structure's integrity and monitor the health of all types of structures.
Sensequake technology can be used for rapid seismic and time history analysis on as many ground motions as needed. It also provides response histories and maximum global seismic demands solely based on the sensing test results without any finite element models.
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The raw data is inputted directly into 3D-SAM from the sensors for processing.
Data is analyzed to find the modal properties of the structure.
Animated 3D-models are rendered to show the effects of the vibrational modes on the structure.
The raw data is inputted directly into 3D-SAM from the sensors for processing.
Results
MODAL IDENTIFICATION
• 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 floor and roof flexibility
• Specialized analysis and sensing tests for specific structural components to understand their true behaviour
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-level performance to future earthquakes by comparing the demands with specified thresholds
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-level performance to future earthquakes by comparing the demands with specified thresholds
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 concerns
Sensors
Vibration 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.
Whether for structural analysis, vibration management or permanent structural health monitoring, we have a dedicated system based on hypersensitive sensors. The Larzé Sensors are our flagship sensors designed for highly detailed ambient vibration analyses. The ShakeZone system is designed for site-wide vibration monitoring projects and is combined with our online cloud management and alarm system. Finally, the ShakeLog system is a permanent sensor-based SHM solution for long-term applications for any kind of structure.
For more information, visit our product lineup page.
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