【摘要】 为研究一种自制的无机胶粘贴CFRP布加固混凝土结构构件在不同界面粗糙度下的受弯性能，采用碱激发矿渣胶凝材料作为粘接剂，对6根钢筋混凝土梁进行粘贴CFRP布加固，并对加固梁进行四点弯曲试验，分析试验破坏形态、荷载、挠度、刚度、CFRP布应变等。结果表明，对无机胶粘贴CFRP布加固后的混凝土表面进行粗糙处理确实会提高试件的抗裂承载力、极限承载力和刚度，且界面粗糙处理对抗裂承载能力的提高幅度要大于对极限承载力的提高幅度；在混凝土试验梁达到极限破坏荷载时，界面处理后跨中附近的应变为界面不作处理应变的100%～110%,粗糙处理后，锚固区附近的应变降低程度增大，为界面不作处理应变的40%～60%,该数值从跨中区域向端锚区域逐渐减小；粘贴一层碳纤维布的加固梁在经过界面处理后的开裂荷载较界面不作处理时提高了28.7%,界面粗糙处理对开裂荷载的提高有促进作用。更多还原

【Abstract】 In order to study the flexural performance of a self-made inorganic adhesive bonded CFRP sheet reinforced concrete structural members under different interface roughness, alkali-activated slag cementitious materials were used as adhesives to bond CFRP sheets to 6 reinforced concrete beams. Four-point bending test was carried out on the reinforced beams, and the failure mode, load, deflection, stiffness and CFRP sheet strain were analyzed. The results show that the roughness treatment of the concrete surface reinforced by inorganic adhesive bonded CFRP sheet can indeed improve the crack resistance bearing capacity, ultimate bearing capacity and stiffness of the specimen, and the improvement of the crack resistance bearing capacity of the interface roughness treatment is greater than that of the ultimate bearing capacity. When the concrete test beam reaches the ultimate failure load, the strain near the mid-span after interface treatment is 100% ～ 110% of the strain without interface treatment. After roughness treatment, the strain reduction near the anchorage zone increases, which is 40%～60% of the strain of the interface without treatment, and the value gradually decreases from the mid-span area to the end anchorage area. The cracking load of the reinforced beam with a layer of carbon fiber cloth after interface treatment is 28.7% higher than that of the interface without treatment, and the interface roughness treatment can promote the increase of cracking load.更多还原