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Title |
Performance Evaluation of Structure Strengthening Using Sprayed FRP Technique
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Keywords |
분사식 FRP ; 유리섬유 ; 폴리에스터 수지 ; 프리스트레스트 콘크리트 Sprayed FRP ; Glass fiber ; Polyester resin ; Prestressed concrete |
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Abstract |
The sprayed FRP strengthening technique is combining the Glass fiber and Polyester resin in open air and spraying randomly at concrete’s surface with high-speed compressed air. Then it strengthens the structures with a new technique evaluated the structural performance. We applied it to concrete beam and tested for flexural strength, depended on Korea Standard(KS F2408). Then based on the result of flexural strength, the properties were proposed that applying to structures. Based on the experiment, we have evaluated structural performance by the experiment. 1/5 scale prestressed concrete I-beam were made by Korean Highway’s typical drawing in 1993. With these test results, 49.8% increased in flexural strength, improvement of the behavior of serviceability state, and strengthening was surely effective for controlling deflection and crack of structure. Consequently, it can be summarized that Sprayed FRP technique has prospect to improve the performance of structure.
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