【摘要】 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。更多还原

【Abstract】 Based on static tests on 27 RC beams,the influence of different strengthening patterns and different number of near-surface mount/external bond reinforcements on the failure mode,ultimate bearing capacity and stiffness of carbon fiber reinforced plastic(CFRP)-strengthened common concrete beams and π-type concrete beams was studied.The flexural behavior of the strengthened concrete beams(π-type concrete beams) was explored and the strengthening effects of near-surface mounted(NSM) method and external bond reinforced(EBR) method on common concrete beams and π-type beams were compared.Results indicate that,the reinforcing effect of π beams is slightly weaker than that of common concrete beams.Despite common concrete beams or π concrete beams,NSM technique has better performance than externally bonded technique.更多还原