2004 Fiscal Year Final Research Report Summary
Research on the Application of Newly Developed Prestressed Concrete Structures
| Project/Area Number |
15360235
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Structural engineering/Earthquake engineering/Maintenance management engineering
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
NIWA Junichiro Tokyo Institute of Technology, Graduate School of Science and Engineering, Professor, 大学院・理工学研究科, 教授 (60164638)
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| Co-Investigator(Kenkyū-buntansha) |
OTSUKI Nobuaki Tokyo Institute of Technology, Graduate School of Science and Engineering, Professor, 大学院・理工学研究科, 教授 (40211106)
YOKOTA Hiroshi Port and Airport Research Institute, Structural Mechanics Division, Director, 構造強度研究室, 室長 (50344312)
HAMADA Yuzuru DPS Bridge Co., Technical Research Center, Chief Research Engineer, 技術センター, センター長(研究職)
KONO Katsuya Tokyo Institute of Technology, Graduate School of Science and Engineering, Research Associate, 大学院・理工学研究科, 助手 (40361779)
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| Project Period (FY) |
2003 – 2004
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| Keywords | Prestressed Concrete / Ultra High Strength Fiber Reinforced Concrete / Composite Structure / Unification / Precast Member / Ultimate Shear Capacity / Truss Structure / Size Effect |
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| Research Abstract |
Giving a mind to the application to bridges, the practical use of newly developed PC structures has been investigated. The ultra-high strength fiber reinforced concrete (UFC) was used to the web part of PC girders to achieve the excellent composite structures having high strength and durability. From the basic research done in 2003, the application of the shear key and the penetration of reinforcing bars were found to be effective and it was confirmed that the stub at the edge of a PC girder was also very effective to stop the slip. In 2004, the specimens of PC girders were produced based on the obtained knowledge in 2003. Actually, various shapes of web members were examined in 2004, such as rectangular panels, triangular panels, truss members or truss members with prestress. By experiments and numerical analyses using nonlinear FEM, the stiffness, deformation ability and ultimate capacity were verified.
According to these examination, the newly developed PC structures using UFC as web members have indicated the excellent mechanical behavior. Especially, when rectangular panels were used, the capacity was more than double for the case of triangular panels or truss members. The effect of prestressing for truss members was also very effective.
In conclusion, the newly developed PC structures, i.e., PC girders having UFC members as web, were confirmed to create safe and sound civil engineering structures. The obtained results of this research were presented in various journals, such as Journal of Material, Concrete Structures and Pavement of JSCE, and the Proceeding of Japan Concrete Institutes.
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