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Spatial Structure Development Engineering Lab
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The lab makes the most of the strength of steel to build earthquake-resistant steel buildings.
AboutAbout the lab
Making steel-frame buildings reliably safe
The Spatial Structure Development Engineering Lab studies building structures that make the most of the properties of steel materials.
It aims to develop and preserve structural spaces that meet diverse and advanced requirements, such as those for resisting earthquakes.
The lab is working to establish, through both analysis and experiments, design methods based on the behavior of members such as columns and beams and of the joints joining them.
It is led by Professor Koetaka and Lecturer Inamasu, and is also called the Koetaka-Inamasu Lab.
Key terms
- High-strength bolt
- A high-strength bolt that tightens steel members firmly together to join them
- Damper
- A device attached to a building that absorbs the energy of earthquake shaking
- Joint
- The part that joins members to each other, such as a column and a beam
ResearchResearch themes
To develop and preserve structural spaces that meet increasingly diverse and high-performance requirements, such as those for earthquake resistance, the lab devises structures that bring out the full properties of steel, and studies design methods based on how members and joints behave as they reach their limits and collapse.
*Illustrative imageImproving Earthquake Resistance and Quality with New Steel and Joints
The lab develops new structural systems and connections using high-strength steel and high-strength bolts. Bolted joints keep construction quality stable, and by making only the dampers deform, the columns and beams are protected so that buildings remain usable after an earthquake.
*Illustrative imageSeismic Measures for Existing Steel Buildings
Design and construction technologies differ by era, and many buildings have low seismic performance. After examining welding defects and damage patterns in actual buildings and determining their current seismic performance, the lab develops effective retrofitting methods suited to each structure.
MembersFaculty
The Spatial Structure Development Engineering Lab consists of faculty members, researchers, doctoral, master's, and undergraduate students, and research students.As of 2024
- ProfessorYuji Koetaka
- LecturerHiroyuki Inamasu
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: “Three dimensional truss construction Unic Rotarex®” Marius Rotar / CC BY-SA 4.0 (cropped)
- Improving Earthquake Resistance and Quality with New Steel and Joints: “Detail of typical beam - lateral bracing bolted connection. View to northeast. - 86th Street Overpass, Spanning Interstate 35 and 80 at Northwest Eighty-sixth Street, Urbandale, Polk HAER IA-42-15” Related names: Ashton, Edward L Pullman Standard Car Manufacturing Company Wegman-French, Lysa, transmitter / Public domain (cropped)
- Seismic Measures for Existing Steel Buildings: “Duzce 1999 earthquake damage Bilham 886” Roger Bilham / Public domain (cropped)
- Related lab (Building Earthquake Engineering Lab): “Kinematically equivalent building models on a shake-table” Shustov / CC BY-SA 3.0 (cropped)
- Related lab (Architectural Structures Lab): “NR Dresden Seilnetzkonstruktion einer Sporthalle” Jörg Blobelt / CC BY-SA 4.0 (cropped)
- Related lab (Earthquake Environmental Engineering Lab): “Overview Seismic Waves” LukeTriton, Steven Earle, Mario Bačić, Lovorka Librić, Danijela Jurić Kaćunić, Meho Saša Kovačević / CC BY-SA 4.0 (cropped)
- Related lab (Architectural Conservation and Regeneration Lab): “Fukuoka Parco Main Bldg the seismic retrofit Tenjin 2-chōme Chūō-ku Fukuoka 20240812” Hirho / CC BY-SA 4.0 (cropped)
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