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《Sichuan Building Science》 2006-04
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Effect of initial damage on uhe flexural performance of reinforced concrete beams strentthed of cfrp sheets

QIAN Wei~(1,2),GAO Dan-ying~1(1.Zhengzhou University,Zhengzhou 450002,China;2.Henan Provincial Academy of Building Research,Zhengzhou 450053,China)  
Nine initially damaged reinforced concrete beams with epoxy-bonded carbon fiberglass reinforced plastic(CFRP)sheets,six RC beams strengthening with CFRP directly and three RC beams were experimentally investigated.The failure mechanism of RC beams of different initial load and load history strengthened with externally bonded CFRP sheets is analyzed.The effect of load history and initial damage on development of crack,stiffness and flexural capacity is studied.The results generally indicate that the flexural performance of the repaired beams is increased.And load history and initial damage affect the development of crack,stiffness and flexural capacity of the beams.
【Fund】: 国家自然科学基金研究项目(50579068)
【CateGory Index】: TU375.1
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