Structural Health Monitoring
The ultimate goal of Structural Health Monitoring is to predict the remaining life of structures, such as a bridges, railroads, roads, viaducts or buildings.
Although that goal is still an open question, a few intermediate steps of damage identification have been defined 1, where predicting the remaining service life is the last one:
- identifying the existence of damage;
- identifying damage location;
- identifying the extent and type of damage;
- predicting the remaining service life of the structure.
These steps are also called levels of damage identification. Current methods can perform level 1 and 2 damage identification, and even level 3 when we include models of the degradation behavior of the structure.
Laser Doppler Vibrometer
- modal identification and assessment of JR Shinkansen viaducts
- monitoring of cable-supported bridges
We are also doing research to apply the newest wireless sensor technologies to structural health monitoring to civil structures, including:
- developing damage identification methods to take advantage of the
computational capabilities of wireless sensors
Here is a poster presenting the research (PDF 552KB, December 2006).
- starting to monitor buildings on the campus of the University of Tokyo (in construction)
Integrated Accelerometer Systems
- Train Intelligent Monitoring System (TIMS)
- Vehicle Intelligent Monitoring System (VIMS)
- Scott W. Doebling, Charles R. Farrar, and Michael B. Prime. A summary review of vibration-based damage identification methods. The Shock and Vibration Digest, 30(2):91-105, 1998.