【摘要】 为了系统研究GFRP直径、再生混凝土粗骨料取代率、立方体抗压强度及劈裂强度四因素对GFRP筋再生混凝土间粘结性能的影响,按照CSA标准设计制作了12组标准粘结试验并进行抗拔试验。试验结果表明,再生混凝土粗骨料取代天然骨料对粘结破坏形态影响不大,破坏形态以拔出破坏为主;但平均粘结强度随着再生混凝土粗骨料取代率的增大而下降;立方体抗压强度、劈裂强度两者对平均粘结强度的影响较为相似,均显示出随强度下降而下降的趋势;由于剪力滞后的影响,平均粘结强度随GFRP筋直径的增大而下降。更多还原

【Abstract】 Based on the pull-out tests of 12 groups specimens which were designed according to CSA standard,the influence of four factors( the diameter of GFRP rebars,the incorporation rate of recycled concrete coarse aggregate,cubic compressive strength and splitting strength) on bond behavior of GFRP rebars and recycled concrete were systematically studied. The test results show that the source of coarse aggregate has little influence on bond failure pattern,and most of the patterns are pull-out failure,but the average bond strength decreases with the incorporation rate of recycled concrete coarse aggregate increasing; the cubic compressive strength and splitting strength have similar influence on the average bond strength which decreases with the strength of recycled concrete decreasing; and due to the adverse effect of shear lag,the average bond strength decreases when the diameter of GFRP rebars is increasing.更多还原