2006 Fiscal Year Final Research Report Summary
Study of Fatigue Strength Improvement by "UV-Curable-FRP-SHEET-Reinforcement" and Vibration
| Project/Area Number |
16560420
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Chuo University |
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Principal Investigator |
HIRANO Hirokazu Chuo University, Factory of Policy Studies, Prof., 総合政策学部, 教授 (80256023)
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| Co-Investigator(Kenkyū-buntansha) |
OHSHITA Hideyoshi Chuo University, Factory of Science and Engineering, Prof., 理工学部, 教授 (40253108)
AOKI Tetsuhiko Aichi Institute of Technology, Factory of Engineering, Prof., 工学部, 教授 (70064946)
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| Project Period (FY) |
2004 – 2006
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| Keywords | fatigue tests / reinforcement / life extension / UV-Curable-FRP-Sheet / vibration control / rolling mass damper / pillar structure |
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| Research Abstract |
In recent years, the fatigue damage of sign pillars on highway bridges used rubber bearings becomes a problem. So we, the authors conformed the reinforcing effect of the UV-Curable-FRP-Sheet Reinforcement for pillars by vibration tests. And them to confirm the effect of the fatigue strength improvement by this reinforcing method, we verified the reduction of the crack progress speed on a flat panel model with FEM. As a result, this reinforcing method was proved able to reduce the crack progress speed of this model by half.
Next, the development and design to vibration control of Multi-direction Tuned Rolling Mass Damper (MTRMD) system for pillar structures. MTRMD system is the combination of the container of the rotating ball and the hemisphere which stuck the synthetic rubber. The simulation and experimental model tests have been done to estimate the abilities the MTRMD system. The performance of the MTRMD was confirmed by the simulation and experiments with pillar structures. Therefore we have developed some reducing methods and equipments of stress and strain on substructures.
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