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Takahashi Lab
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The lab studies the forces that snow, wind, and earthquakes exert on buildings, as well as the reliability of structures.
AboutAbout the lab
Capturing the forces on buildings in numbers.
The Takahashi Lab focuses on loads and external forces acting on buildings, and on structural reliability.
Using meteorological data and experiments, the lab investigates how natural forces such as snow, wind, and earthquakes affect buildings.
A method for estimating snow loads, developed by the lab, was adopted in the Architectural Institute of Japan's load recommendations and in national notifications.
The lab is also carrying out damage surveys after typhoons and research on how people move indoors during major earthquakes.
Key terms
- Loads and external forces
- A collective term for the weight acting on a building and forces such as snow, wind, and earthquakes.
- Structural reliability
- An approach that uses probability to evaluate how likely a building is to withstand loads without failing.
- Kokuji (government notification)
- Rules that a national government agency announces publicly on the basis of law. Many of the detailed standards of the Building Standards Act are set by kokuji.
ResearchResearch themes
The lab conducts a wide range of research and education centered on loads and external forces and on the reliability of structures. Current research covers snow loads, wind loads, and indoor safety during strong earthquakes.
*Illustrative imageResearch on Snow Loads
The lab developed a method for estimating the weight of snow on the ground from precipitation and temperature data, and it was adopted in the Architectural Institute of Japan's load recommendations. The lab also works on estimating snow depth at sites where snow is not observed, and on experimentally demonstrating that rain falling after snowfall increases the snow load on roofs.
*Illustrative imageResearch on Wind Loads
The lab conducts damage surveys after typhoons, including Typhoon No. 15 (Faxai) in 2019. It developed a method that uses AI to quickly identify damaged houses from aerial photographs, and, to forecast demand for repairs, enabled AI to identify roofing materials.
*Illustrative imageResearch on Indoor Safety During Strong Earthquakes
Based on shake-table experiments, the lab quantifies evacuation behavior during major earthquakes in terms of how difficult the actions are and how anxious people feel. It also uses a game engine to recreate how a room changes during shaking, and uses dummies to measure the risk of furniture overturning.
MembersFaculty
- ProfessorToru Takahashi
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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: “Snow coming off roof of seasonal house. (412a3f0d63ca4890a37f6399a750f29a)” Lee Snook (MORA) / Public domain (cropped)
- Research on Snow Loads: “The banks, they are made of snow ( )” Ben Babcock from Thunder Bay, Canada / CC BY 2.0 (cropped)
- Research on Wind Loads: “Storm Damage - 18th January 2007 - geograph.org.uk - 315066” David Wright / CC BY-SA 2.0 (cropped)
- Research on Indoor Safety During Strong Earthquakes: “Interior of a damaged building after 7,8 magnitude earthquake in Turkiye” Adem / CC BY-SA 4.0 (cropped)
- Related lab (Structural Safety Planning Lab): “Steel skeleton fabrication - geograph.org.uk - 4033831” Stephen Middlemiss / CC BY-SA 2.0 (cropped)
- Related lab (Structural Safety Planning Lab (Harada)): “Steel Frame Commercial Building Under Construction, Ann Arbor Township, Michigan” Dwight Burdette / CC BY 3.0 (cropped)
- Related lab (Structural Safety Planning Lab (Hirashima)): “Onex-StMartin-intérieur-11” MHM55 / CC BY-SA 4.0 (cropped)
- Related lab (Structural Safety Planning Lab (Nakamura)): “UCSD-JacobsSchool-20230406-Shake table-Tallwood-sunset-05308-DNG dxo-8MP” Jacobs School of Engineering / CC BY 2.0 (cropped)
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