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Title |
Structural Performance Evaluation of Reinforced Concrete Beams with Externally Bonded FRP Sheets
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Keywords |
보강; 섬유보강재; 휨보강성능; 강성; 내하력; 설계식 retrofitting ; FRP; flexural performance; stiffness; load capacity; design formula |
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Abstract |
Reinforced concrete beams are often retrofitted with various FRP composite sheets. This paper is focused on the comparison of structural performance of various FRP sheets and proposal of the retrofitting design formula. Effects of the FRP kinds(AFRP, GFRP, CFRP) and the reinforcing steel ratio on behavior of the retrofitting beams are tested and analyzed with particular emphasis on the maximum load capacity, stiffness, and ductility. The experimental work included 4 point flexural testing of 3.2m span reinforced concrete beams with bonded external reinforcements. The results show that the difference of FRP kinds is not large and the flexural load capacity is mainly affected by stiffness of the retrofitting materials. This paper also proposes the design formula on the retrofitting reinforced concrete flexural members and checks with this experimantal work and previous research results
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