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Sasaki Lab
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A lab exploring how to keep bridges and other steel structures safely in use.
AboutAbout the lab
Keeping infrastructure safe to use.
The Sasaki Lab conducts research mainly on steel structures to support the safety management of infrastructure.
It investigates the causes of cracks and fractures produced by traffic loads and earthquakes, and explores ways to prevent them.
By measuring vibrations on real bridges and analyzing the data, the lab builds systems that can capture structural behavior and detect damage.
The lab also works on inspection methods using eddy currents and on energy harvesting, which generates electricity from bridge vibrations.
Key terms
- Maintenance and management
- Keeping a constructed structure in safe use over the long term through inspection and repair
- Eddy current
- A swirling electric current induced inside metal when a changing magnetic field is brought near it. Its flow changes when there is a flaw
- Energy harvesting
- Collecting small amounts of ambient energy, such as vibration or heat, and converting it into electricity
ResearchResearch themes
The lab conducts research mainly on steel structures to support the safety management of infrastructure. It draws on four approaches: fracture and fatigue, structural behavior analysis through field measurement, inspection methods, and energy harvesting.
*Illustrative imageFracture and fatigue
To identify the causes of cracks and fractures produced by traffic loads and earthquakes and to control their occurrence, the lab pursues both experiments and analysis. In terms of maintenance and management, it also studies the strength remaining in aged structures.
*Illustrative imageBehavior analysis through field measurement
By combining field measurements, such as vibration measurements on real bridges, with model analysis and data analysis, the lab builds systems that can capture structural behavior and detect damage. It also develops new sensors suited to the characteristics of the target structures.
*Illustrative imageInspection methods
Eddy currents can detect cracks and corrosion in steel members even beneath paint or inside concrete. Aiming to make inspection more efficient and to propose inspection methods for places that are hard for people to reach, the lab studies the practicality of inspection using devices that visualize the interior and micro-robots.
*Illustrative imageEnergy harvesting
The lab develops self-powered monitoring and vibration control systems that convert the energy of vibrations in bridges into electrical energy and store it. It aims to build efficient bridge maintenance and management systems that ensure the safety of infrastructure.
MembersFaculty
The members of the Sasaki Lab consist of faculty, researchers, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorEiichi SasakiPublications ↗
- Assistant ProfessorAyako Akutsu
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Shin-Meiji Bridge, Hiroshima” Braveheart / CC BY-SA 4.0 (cropped)
- Fracture and fatigue: “Steel Bridge Inspection - Portland bridges” Oregon Department of Transportation / CC BY 4.0 (cropped)
- Behavior analysis through field measurement: “Steel Bridge Inspection - Snooper truck” Oregon Department of Transportation / CC BY 4.0 (cropped)
- Inspection methods: “EDDY CURRENT PROBE - NARA - 17497423” 作者不詳 / Public domain (cropped)
- Energy harvesting: “Bridge inspection Shangr-La, China” Pieceofmetalwork / CC BY 4.0 (cropped)
- Related lab (内海研究室): “Bluish rain shaft coming from the base of a thunderstorm viewed from Old Ox Road in the Dulles section of Sterling, Loudoun County, Virginia” Famartin / CC BY-SA 4.0 (cropped)
- Related lab (丸山研究室): “Seiun Bridge, Yamashiro” Navian / Public domain (cropped)
- Related lab (松﨑研究室): “022srUSGSCyprusVia” H.G. Wilshire, U.S. Geological Survey / Public domain (cropped)
- Related lab (吉村研究室): “Tama River, Japan; August 2016 (02)” 雷太 / CC BY 2.0 (cropped)
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