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Title |
Strengthening Capacity of Bridge Deck Strengthened with Carbon Fiber Rod and Polymer Mortar
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Keywords |
계면탈락; 펀칭전단; 등방성보강(CR-E); 이방성보강(CR-UE) ; carbon fiber rod; punching shear; evenly strengthening (CR-E); unevenly strengthening (CR-UE) |
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Abstract |
This paper deals with an enhanced structural capacity of reinforced concrete bridge deck strengthened with carbon fiber rod (CFR) which is subjected to monotonic and cyclic loads. Strengthening variables considered in this test were evenly and unevenly strengthening type. To evaluate strengthening capacity for these two strengthening types, load-carrying capacity and crack and failure pattern from the failure test were analyzed and fatigue response were examined. According to the test results, all the strengthened specimens showed punching shear failure as a result of premature failure of bonding interface between mortar and concrete. In the case of strengthening capacity, it was observed that the strengthened specimens was more effective in strength, stiffness and fatigue endurance limit than the unstrengthened specimen. In addition, the unevenly strengthening method (CR-UE) was more effective than the evenly strengthening method (CR-E)
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