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Structural Materials Lab
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A lab that makes concrete structures strong, beautiful, and long-lasting.
AboutAbout the lab
From molecular structure to civil structures.
The Structural Materials Lab studies concrete, the most widely used material in civil engineering structures.
As the foundation of society, civil engineering structures are used for many years under harsh natural and social environments, and they become damaged and deteriorate.
The lab therefore covers a broad range, from the basic properties of concrete as a material to the durability performance and maintenance of structures.
It also works on soundness assessment, repair, and strengthening of deteriorated structures, and on the development of new materials and new structural forms.
Key terms
- Limit state
- The boundary state beyond which a structure can no longer fulfill its function. It is defined separately for ultimate, serviceability, fatigue, and durability, and design proceeds by verifying, with a safety factor, that the structure will not reach it
- Plastic deformation
- Deformation that does not return to the original shape even after the force is removed. When a structure receives a large force such as an earthquake, it absorbs energy through this deformation
- Soundness assessment
- Examining the extent of deterioration and damage to judge how much performance a structure currently retains
ResearchResearch themes
Centered on concrete, the lab covers everything from the basic properties of civil engineering materials to the durability performance and maintenance of structures. With the breadth of "from molecular structure to civil structures," it aims to realize civil engineering structures that are strong, beautiful, and long-lasting.
*Illustrative imageDesigning by verifying performance
This is a design method in which the performance required of a structure is set according to load and environmental conditions, and it is verified that the performance the structure holds will not reach a limit state, with a safety factor. The lab examines the ultimate, serviceability, fatigue, and durability limit states.
*Illustrative imageInvestigating the ductility of members
Reinforced concrete and prestressed concrete members must have the ductility to absorb and dissipate energy under excessive external forces such as those in an earthquake. The lab investigates load-bearing capacity and plastic deformation characteristics under each loading condition.
*Illustrative imageMechanisms of deterioration and durability
Focusing on the factors that reduce durability, the lab clarifies deterioration mechanisms and builds mathematical models. Through exposure tests in real environments, it examines the effects on member performance and links the results to deterioration prediction and monitoring technologies.
*Illustrative imageSoundness assessment and maintenance
The lab develops systems for assessing the soundness of existing concrete structures that have deteriorated or been damaged. It examines repair and strengthening methods and their effects, and also aims to establish a framework for selecting materials and construction methods.
MembersFaculty
The members of the Structural Materials Lab are faculty, technical staff, secretaries, and doctoral, master's, and undergraduate students.As of 2025
- ProfessorTakashi Yamamoto
- Associate ProfessorSatoshi Takaya
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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: “Low-angle view of a concrete bridge over Mahurangi river, Warkworth (AM 75085-1)” Collins, Tudor Washington, , photographer / CC BY 4.0 (cropped)
- Designing by verifying performance: “Probetas hormigón 01” No machine-readable author provided. Tano4595 assumed (based on copyright claims). / CC BY-SA 2.5 (cropped)
- Investigating the ductility of members: “Bridge abutment damaged by the 2022 earthquake, Shiroishi city, Japan” Katorisi / CC BY 4.0 (cropped)
- Mechanisms of deterioration and durability: “ASR concrete pillar National Gallery of Canada 02” Shinkolobwe / CC BY-SA 4.0 (cropped)
- Soundness assessment and maintenance: “Qew bruecke nf beton kaputt 46 von 46” Achim Hering / CC BY 3.0 (cropped)
- Related lab (海岸防災工学): “Storm surge Wilhelmshaven” Jacek Rużyczka / CC BY-SA 3.0 (cropped)
- Related lab (流体資源エネルギー学): “Liaohe oil field” Yoshi Canopus / CC BY-SA 4.0 (cropped)
- Related lab (構造ダイナミクス): “Earthquake proof! (mcpherson-fig2)” ESO / CC BY 4.0 (cropped)
- Related lab (地盤力学): “Soil sample Château d’Yquem, Sauternes” Megan Mallen / CC BY 2.0 (cropped)
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