| Project/Area Number |
06650498
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
土木材料・力学一般
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| Research Institution | Yamanashi Unversity |
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Principal Investigator |
HIGAI Takeshi Yamanashi Univ. Civil & Environmental Engin. Professor, 工学部, 教授 (70115319)
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| Co-Investigator(Kenkyū-buntansha) |
NAKAMURA Hikaru Yamanashi Univ. Civil & Environmental Engin. Associate Professor, 工学部, 助教授 (60242616)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1995: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1994: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Keywords | RC slabs / Highway bridges / Inspection / Impact response / Through the depth cracks / FEM analysis / 健全度判定方法 / 解析方法 |
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| Research Abstract |
Final objective of this study is to develop a non-destructive test method, which can easily and quantitatively evaluate the condition of cracking in the RC slabs of highway bridges. Here, as a first step of the research work, dynamic response of concrete slabs, both with and without through the depth cracks, to the light impact load is studied through experimental and analytical approaches. Response of the slabs were calculated by FEM as the 3-dimensional vibration problem using elastic model with link elements representing the cracks in the specimen. Main conclusions of the studies are as follows.
1. Provided the impact load and boundary conditions are accurately modeled, dynamic response of the slabs with through the depth cracks can be satisfactorily evaluated by 3-DFEM analysis.
2. Based on both experimental and analytical studies, it is confirmed that the presence of through the depth cracks could be detected by the dumping characteristics of vertical acceleration in the slabs.
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