2013 Fiscal Year Final Research Report
Seismic Retrofit of Existing RC members with CFRP Grid by Polymer Cement Mortar for Shotcrete
| Project/Area Number |
24760366
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Structural engineering/Earthquake engineering/Maintenance management engineering
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| Research Institution | Kyushu University |
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Principal Investigator |
YAMAGUCHI KOHEI 九州大学, 工学(系)研究科(研究院), 助教 (60336013)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 維持管理 / 新素材 / 炭素繊維 / 耐震補強 |
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| Research Abstract |
Seismic retrofit of existing RC pier using RC lining method is most general, but there are some problems that increase of the cross-section area (minimum 250mm) cause increment of dead load and impediment ratio of river. Then it was proposed seismic retrofit constructing method with CFRP grid by polymer cement mortar for shotcrete ;SRS method. Because this method can set CFRP grid contact on the surface of existing RC pier and adhesive strength of PCM is higher than nominal concrete and neutralization speed compared with nominal concrete is also about 1/5.
It was carried out bending test of 3 type RC piers which is designed by SRS method with scale factor 1/5 of existing RC pier. As a result, it was clarified horizontal load carrying capacity, ductility and energy absorbing capacity were higher than the design value based on Standard Specifications for Highway Bridges. Finally, it was clarified effectiveness of the bending capacity for seismic retrofit of existing RC pier by SRS method.
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