2010 Fiscal Year Final Research Report
Highly seismic-resistant new type bridge taking advantage ofgeosynthetic-reinoforced soil
| Project/Area Number |
20360215
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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 |
Geotechnical engineering
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| Research Institution | Tokyo University of Science |
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Principal Investigator |
TATSUOKA Fumio Tokyo University of Science, 理工学部・土木工学科, 教授 (70111565)
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| Co-Investigator(Kenkyū-buntansha) |
TSUKAMOTO Yoshimichi 東京理科大学, 理工学部・土木工学科, 准授 (50253505)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 新形式一体橋梁 / ジオシンセティックス補強盛土 / 地震時安定性 / 振動台実験 / 模型実験 / 橋桁の温度伸縮 / 盛土の受働土圧 / 盛土の主働崩壊 |
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| Research Abstract |
The conventional type bridge, which comprises a girder supported with a pair of cantilever-type abutments via shoes and unreinforced backfill, tends to be massive while the seismic stability is relative low and the long-term maintenance cost is relatively high. To alleviate these problems, a new type bridge (called GRS integral bridge) is proposed. The new type bridge comprises a continuous girder integrated to a pair of abutments without using shoes while the backfill is reinforced with a geosynthetic reinforcement connected to the abutment. By performing a series of model static and dynamic loading tests and numerical analysis, it is confirmed that this new type bridge is much more cost-effective exhibiting substantially higher seismic stability, long-term higher performance and higher constructability than the conventional type bridge.
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