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Structural Dynamics Lab
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The lab uses experiments and analysis to follow how structures shake in earthquakes.
AboutAbout the lab
Dynamics of structures caused by earthquakes.
The Structural Dynamics Lab studies how infrastructure such as bridges shakes in earthquakes.
The lab traces its origins to the first research chair named for earthquake engineering in a civil engineering department at a Japanese university.
Through both experiments and analysis, it covers everything from response to seismic shaking, to control methods that reduce shaking, to implementation in seismic design.
In recent years, performance evaluation that takes into account changes in material properties over long use has become important, and the lab is also advancing research on deteriorated members.
Key terms
- Laminated rubber bearing
- A bearing made of alternating layers of rubber and steel plates. Placed between the bridge girder and pier, it makes it harder for ground shaking to be transmitted upward
- Hybrid simulation
- An experimental method in which part of a structure is shaken as a physical specimen, the rest is solved by calculation, and the two are coupled to obtain the response
- Insensitive structure
- A structure that is insensitive to shaking, whose response does not change much even if the characteristics of the ground motion change
NewsLab news
Lab visit days for students about to enter their fourth year are announced
Research results accepted for publication in Engineering Structures
Research results accepted for publication in Structure and Infrastructure Engineering
Research results accepted for publication in Journal of Bridge Engineering
ResearchResearch themes
The lab studies the dynamic response of infrastructure to earthquake ground motion through both experiments and analysis. It covers structural dynamics broadly, from response during earthquakes to control methods and their implementation in seismic design.
*Illustrative imageCreating Structures That Fail Well
Current seismic design is based on the idea of allowing damage in a large earthquake while preventing collapse. Aiming for such "structures that fail well in a major earthquake," the lab is developing seismic structures based on new concepts, such as insensitive structures and metabolism structures.
*Illustrative imagePerformance of the Bearings That Support Bridges
Many cases have been reported in which bridge bearings deteriorated in ordinary service and led to damage to the superstructure. In earthquakes, fracture damage to laminated rubber bearings has also been confirmed, and the lab is evaluating the performance of bearing structures and developing new ones.
*Illustrative imageExperiments That Connect the Real Thing and Calculation
Testing a large structure in its entirety is difficult. So the lab is building an experimental system for hybrid simulation, in which only the part that most affects the response is extracted and shaken, the rest is solved by numerical calculation, and the two are coupled in real time.
*Illustrative imageBearings Degraded by Environmental Effects
The lab examines how bridge bearings degraded by environmental effects and the like behave in earthquakes.
MembersFaculty
The members of the Structural Dynamics Lab are faculty, secretaries, and master's students.As of 2026
- ProfessorYoshikazu Takahashi
- Assistant ProfessorKeita Uemura
- Program-Specific Assistant ProfessorTomoya Ueda
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: “Earthquake proof! (mcpherson-fig2)” ESO / CC BY 4.0 (cropped)
- Creating Structures That Fail Well: “Tuned mass damper - Taipei 101 - Wikimania” guillom / CC BY-SA 3.0 (cropped)
- Performance of the Bearings That Support Bridges: “) Bridge bearing at Donaubrücke in Krems an der Donau, Austria” GT1976 / CC BY-SA 4.0 (cropped)
- Experiments That Connect the Real Thing and Calculation: “Kinematically equivalent building models on a shake-table” Shustov / CC BY-SA 3.0 (cropped)
- Bearings Degraded by Environmental Effects: “BridgeBearing” Douglas W. Jones / CC0 (cropped)
- Related lab (社会基盤創造工学): “General Rafael Urdaneta Bridge view from the lake to Cabimas side” Wilfredor / CC0 (cropped)
- Related lab (地盤力学): “Soil sample Château d’Yquem, Sauternes” Megan Mallen / CC BY 2.0 (cropped)
- Related lab (地震ライフライン工学): “Water supply pipeline crossing the Canning River from Shelley to Wilson, June 2021 02” Calistemon / CC BY-SA 4.0 (cropped)
- Related lab (橋梁工学): “Kampen, Molenbrug. . (actm.) 01” Agnes Monkelbaan / CC BY-SA 4.0 (cropped)
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