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通过对27根钢筋混凝土梁的静载试验,研究了不同加固方式、不同嵌贴数量对CFRP材料加固普通混凝土梁及π型混凝土梁的破坏形态、极限承载力及刚度等的影响,研究了被加固(π型)混凝土梁的弯曲特性,比较了表层嵌入法和表层外贴法加固普通混凝土梁和π型混凝土梁的加固效果。结果表明,CFRP材料加固π型混凝土梁的效果稍次于加固普通混凝土梁;无论是普通混凝土梁还是π型混凝土梁,表层嵌入法的加固效果明显优于表层外贴法。
Through the static load test of 27 reinforced concrete beams, the influence of different reinforcement methods and different embedded numbers on the failure morphology, ultimate bearing capacity and stiffness of CFRP reinforced concrete beams and π-type concrete beams was studied. The bending characteristics of (π-type) reinforced concrete beams were reinforced, and the reinforcement effects of surface-embedded method and external-layer method on reinforcement of normal and π-type concrete beams were compared. The results show that the effect of CFRP reinforcement on π-type concrete beams is slightly inferior to that of ordinary concrete beams. The reinforcement effect of surface-embedded method is obviously better than that of external surface coating, no matter ordinary concrete beams or π-type concrete beams.