| Project/Area Number |
12555127
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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 | 展開研究 |
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| Research Field |
土木材料・力学一般
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| Research Institution | Yamaguchi University |
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Principal Investigator |
MIYAMOTO Ayaho Yamaguchi University, Faculty of Engineering, Professor, 工学部, 教授 (10093535)
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| Co-Investigator(Kenkyū-buntansha) |
SUZUKI Motoyuki Tohoku University, Graduate School, Professor, 大学院・工学研究科, 教授 (60124591)
NAKAMURA Hideaki Yamaguchi University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (20207905)
HAMADA Sumio Yamaguchi University, Faculty of Engineering, Professor, 工学部, 教授 (30164908)
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| Project Period (FY) |
2000 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥5,800,000 (Direct Cost: ¥5,800,000)
Fiscal Year 2001: ¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 2000: ¥3,600,000 (Direct Cost: ¥3,600,000)
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| Keywords | Bridge structure / Seismic damage state / Evaluation system / Damage transition probability matrix / Functional damage / Social damage / Fault tree analysis / Graphical user interface |
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| Research Abstract |
The Great Hanshin Earthquake had affected seriously on many highway bridges in Hanshin area. From a lot of investigations about the failure mechanisms on the highway bridges during strong earthquake, it was found that the consideration as a highway bridge system which consists of many structural elements such as piles, footings, piers, bearings, restrainers, super structures, etc. is very important to improve of the practical design procedure.
This study attempted to develop a newly developed probabilistic evaluation system of seismic damage states for bridge structures. At first, non-linear dynamic response analyses for the reinforced concrete bridge pier system were performed and the response values were calculated. And also, the probability of the first excursion for the threshold that corresponds to multiple damage states was calculated for each response value by the application of threshold-crossing in random vibration theory. Next, the damage transition probability matrix was constructed on the basis of probability of the first excursion. Then, the damage transition probability matrix conducted the damage transition model that included the damage interaction between elements. Finally, based on resulting probabilities of multiple damage states of structure elements, both functional and social damage states of the bridge structures damaged by earthquakes were evaluated. In addition, the development of a program for visualizing damage transition over time with graphical user interface made it possible to check the transition of structural damage easily in the behavior of the entire bridge structure during an earthquake. Then, by comparing cases with and without seismic retrofits, the effects of different seismic retrofit measures on seismic performance were evaluated.
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