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[International Research Institute of Disaster Science] Earthquake Engineering Lab
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The lab observes earthquake shaking and rapidly estimates the resulting damage.
AboutAbout the lab
Measuring earthquake shaking to quickly understand damage.
The lab conducts research and education to reduce earthquake disasters.
It records strong shaking with observation systems the lab has built itself, then combines analysis with computer simulation.
Using machine learning as well, the lab studies how ground and buildings shake, and applies the findings to monitoring the structural health of buildings and to early damage estimation.
The lab develops damage-reduction technologies that support everything from advance preparedness to the response immediately after an earthquake.
Key terms
- Strong-motion observation
- Recording the strong shaking during an earthquake with instruments placed on the ground and in buildings
- Microtremors
- Very small vibrations that the ground and buildings constantly produce even when there is no earthquake
- Structural health monitoring
- A system that continuously measures a building's vibration to check whether it has been damaged
ResearchResearch themes
The lab's research draws on analysis of strong-motion records obtained from observation systems the lab has built, computer simulation based on numerical modeling, and machine learning. From studies of strong ground motion and ground vibration to structural health monitoring of buildings and early damage estimation, the lab develops technologies to reduce earthquake damage, from advance preparedness to immediate response.
*Illustrative imageApplying Machine Learning to Earthquake Engineering
Focusing on machine learning and deep learning as methods that can model complex phenomena without overfitting, the lab applies them to evaluating strong ground motion and building response. Building a model takes time, but once built it runs quickly, which makes it well suited to immediate use when an earthquake strikes.
*Illustrative imageStrong-Motion Observation
The lab records shaking with strong-motion networks in university campus buildings and on the ground across the main parts of Sendai city. It also takes continuous measurements, from microtremors to strong motion, in municipal buildings across the Tohoku region and transmits the data to the institute in real time.
*Illustrative imageVibration Characteristics of Buildings
Knowing the vibration characteristics of real buildings is important both for verifying designs and for structural health monitoring. Using microtremor measurements, the lab investigates the three-dimensional vibration characteristics of irregularly shaped buildings, and it continues long-term monitoring from before the earthquake disaster to the present.
*Illustrative imageEvaluating Strong Ground Motion and Ground Vibration
Evaluating strong ground motion is essential not only as input ground motion for the seismic design of buildings, but also for municipal damage scenarios and disaster prevention planning. The lab works to advance these evaluations through both analysis of observed records and computer simulation.
MembersFaculty
- Associate ProfessorSusumu Ohno
VoicesStudent voices
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Report an errorAbout the images
For images provided to us or used with permission, the source is listed on each line. Wikimedia Commons images are illustrative and were not taken at the lab (they are cropped). Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Sendai Six Months after The East Japan Earthquake )” Yuya Sekiguchi / CC BY 2.0 (cropped)
- Applying Machine Learning to Earthquake Engineering: “Earthquake damage - road” Martin Luff / CC BY-SA 2.0 (cropped)
- Strong-Motion Observation: “Estación sísmica en Timanfaya- Lanzarote- Illas Canarias- Spain-T16” Luis Miguel Bugallo Sánchez (Lmbuga) / CC BY-SA 3.0 (cropped)
- Vibration Characteristics of Buildings: “Q345B Steel Frame” Syibeehive / CC BY-SA 4.0 (cropped)
- Evaluating Strong Ground Motion and Ground Vibration: “Crack in the ground caused by the earthquake,Kogaishima,Katori-city,Japan” Katorisi / CC BY-SA 3.0 (cropped)
- Related lab ([International Research Institute of Disaster Science] International Disaster Mitigation Strategy Lab): “Tacloban Typhoon Haiyan” Trocaire from Ireland / CC BY 2.0 (cropped)
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提供 (cropped)
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