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Structural Control Lab
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A lab that studies seismic isolation, vibration control, and seismic resistance to protect buildings from earthquake shaking.
AboutAbout the lab
Structural systems that protect buildings from earthquake shaking
The Structural Control Lab studies structures that protect buildings from shaking caused by earthquakes and other forces.
It works in three areas: seismic isolation, which makes shaking harder to transmit to a building; vibration control, which absorbs shaking with devices; and seismic resistance, which strengthens the building itself.
Using device experiments and analyses that replace a building with a model to reproduce its shaking, the lab investigates the seismic performance of buildings.
Key terms
- Seismic isolation
- A method of making earthquake shaking harder to transmit to a building by placing devices such as laminated rubber bearings between the building and the ground.
- Vibration control
- A method of reducing shaking from earthquakes and wind by installing devices such as dampers inside a building to absorb it.
- Damper
- A device that converts the energy of shaking into heat or other forms and absorbs it, so that shaking settles quickly.
- Unbonded PCaPC structure
- A structure assembled from factory-made concrete columns and beams that are clamped together with steel tendons that are not bonded to the concrete.
ResearchResearch themes
To protect buildings from shaking caused by earthquakes, wind, and other forces, the lab does research in three areas: seismic isolation, vibration control, and seismic resistance. Through both experiments and analysis, it investigates how buildings and devices behave under shaking.
*Illustrative imageSeismic isolation devices and earthquake response analysis
The lab develops advanced simulation models of seismic isolation devices and evaluates device performance through experiments and analysis. It also models structures to reproduce earthquake-induced vibration and examines their seismic performance.
*Illustrative imageDesign and evaluation of vibration-controlled structures
The lab studies vibration-controlled structures that reduce shaking and damage in buildings during earthquakes and wind. It investigates optimal design methods for buildings fitted with a TMD (tuned mass damper) and for connected vibration control structures, in which buildings are linked together to reduce shaking.
*Illustrative imageAnalysis of the seismic performance of columns and beams
The lab converts buildings into mechanical models and uses analysis to study how columns, beams, and joints behave under seismic forces. Its subjects are unbonded PCaPC (precast prestressed concrete) buildings and reinforced concrete buildings.
MembersFaculty
- Project ProfessorMasaru Kikuchi
- Associate ProfessorKazutaka Shirai
- Assistant ProfessorTakeaki Koshikawa
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: “Base isolator beneath the Pasadena, California, City Hall” Keithalanporter / CC BY-SA 4.0 (cropped)
- Seismic isolation devices and earthquake response analysis: “Seismic isolator for buildings, based on Teflon, exhibited in Nara” Syced / CC0 (cropped)
- Design and evaluation of vibration-controlled structures: “Infinity Bridge tuned mass damper on small arch-1632” JohnYeadon / CC BY 3.0 (cropped)
- Analysis of the seismic performance of columns and beams: “11-4C 1435 CDA” BCSInfo / CC BY-SA 3.0 (cropped)
- Related lab (Building Structural Engineering Lab): “Konstrukcja SCS siewierz” Michal Bacia / CC BY-SA 4.0 (cropped)
- Related lab (Environmental Functional Materials Engineering Lab): “The World's Longest 3D Printed Concrete Bridge” Municipality of Nijmegen/Michiel van der Kley / CC BY-SA 4.0 (cropped)
- Related lab (Building Materials Lab): “Crushed Sioux Quartzite (upper Paleoproterozoic, b.y.) in concrete (Chamberlain, South Dakota, USA) 2” James St. John / CC BY 2.0 (cropped)
- Related lab (Infrastructure Maintenance Systems Engineering Lab): “Taushubetsu-River-Bridge” MaedaAkihiko / CC BY-SA 4.0 (cropped)
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