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Tajri Lab
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The lab conducts research to make the seismic design of reinforced concrete buildings safer and more rational.
AboutAbout the lab
Building structures that protect lives and property
The Tajri Lab studies design methods for making buildings safer, focusing on reinforced concrete structures.
The lab models buildings using mathematical models, develops and verifies those models through experiments and analysis, and aims to establish design methods and promote their adoption in society.
The lab aims to develop not only highly detailed models but also simple, practical models that are useful to designers working in practice.
The lab's work covers both the design of new buildings and the seismic retrofitting of existing buildings.
Key terms
- Mathematical model
- A representation of a phenomenon in mathematical equations. It is used to calculate on a computer how a building shakes and fails.
- Seismic retrofitting
- Construction work that strengthens an existing building to make it more resistant to earthquakes.
- Seismic response
- How a building shakes and deforms when it is subjected to earthquake shaking.
ResearchResearch themes
Aiming to improve the seismic performance of reinforced concrete buildings, the lab studies structural performance evaluation, seismic response evaluation, and design methods through experiments, analysis, and damage surveys. It focuses in particular on technologies that reduce damage from large earthquakes, design methods that prevent collapse in giant earthquakes, and analysis methods that estimate seismic response accurately.
*Illustrative imagePreparing for Unforeseen Disasters
Some buildings end up escaping damage even in unforeseen disasters, yet no design currently evaluates the safety margin against unforeseen events. The goal is to establish methods for evaluating such safety margins and design methods that increase them.
*Illustrative imageReducing Earthquake Damage
In recent earthquakes, many buildings have avoided collapse but suffered heavy damage and could no longer be used. To maintain building functionality and extend building service life, the lab aims to develop technologies for evaluating, reducing, and controlling damage.
*Illustrative imageRethinking Current Seismic Design Methods
Current seismic design methods still have many unresolved problems and irrational points. The lab aims to resolve them one by one and propose rational design methods that meet present-day needs.
MembersFaculty
The members of the Tajri Lab consist of faculty, technical support staff, and doctoral, master's, and undergraduate students.
- Associate ProfessorSeitaro Tajri
VoicesStudent voices
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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: “Fukuoka Growth Next the seismic retrofit carried out on the former Daimyō Elementary School building Fukuoka 20241231” Hirho / CC BY-SA 4.0 (cropped)
- Preparing for Unforeseen Disasters: “Building X (sea front), which survived - -, and building B, which was overturned” Anawat Suppasri ほか
（Pure and Applied Geophysics, 2013） / CC BY 2.0 (cropped) - Reducing Earthquake Damage: “FEMA - 44668 - Damaged property in California” Adam Dubrowa (FEMA) / Public domain (cropped)
- Rethinking Current Seismic Design Methods: “Hakata Center Bldg the embedded reinforcements in the existing structures for the seismic retrofit Fukuoka 20250110” Hirho / CC BY-SA 4.0 (cropped)
- Related lab (Asai Lab): “2010 Chile earthquake - Building destroyed in Concepción” Claudio Núñez / CC BY-SA 2.0 (cropped)
- Related lab (Kusunoki-Maida Lab): “Burst column” Polyparadigm / Public domain (cropped)
- Related lab (Fujita Lab): “Zentsuji Zentsu-ji Garan Five-storied Pagoda 5” Zairon / CC BY 4.0 (cropped)
- Related lab (Yamada-Iyama Lab): “Steel frame structure” Wikideas1 / CC0 (cropped)
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