【摘要】 为促进碳纤维网格这种新型碳纤维产品在桥梁工程中的应用，以桥梁规范中的适筋梁理论为基础设计试件，采用实际工程的碳纤维网格加固方案分别对未开裂的和开裂的钢筋混凝土梁试件进行加固，开展碳纤维网格加固梁正截面破坏试验研究，并与未加固梁试验结果进行对比分析。结果表明：在试验荷载作用下未加固梁、无损伤加固梁和有损伤加固梁均发生了正截面破坏；无损伤加固梁和有损伤加固梁开裂荷载相当，但裂缝特点不同；加载过程中无损伤加固梁的变形小于有损伤加固梁和未加固梁的；荷载较小时，有损伤加固梁与未加固梁跨中挠度相当，随着荷载的增加，有损伤加固梁的变形开始小于未加固梁；无损伤加固梁和有损伤加固梁的抗弯承载力较未加固梁分别提高了13.6%和16.7%;卸载时，加固梁的变形出现了明显的回弹现象；加载过程中未出现界面剥离问题。研究结果可为评估碳纤维网格在桥梁工程中的加固效果提供参考。更多还原

【Abstract】 In order to promote the application of carbon fiber net, a new type of carbon fiber product in bridge engineering, the specimens were designed based on the theory of suitable reinforcement beam in bridge specifications, and the uncracked and cracked reinforced concrete beam specimens were strengthened by using carbon fiber net reinforcement scheme in practical engineering, and the normal section failure test of carbon fiber net reinforced beam was carried out. The results were compared with the test results of unreinforced beams. Results showed that the crack load of undamaged reinforced beam and damaged reinforced beam was equivalent, but their characteristics were different. The deformation of undamaged reinforced beams was smaller than that of damaged reinforced beam and the unreinforced concrete beam. The mid-span deflection of the damage reinforced beam and the unreinforced concrete beam was equivalent when the load was small. With the increase of load, the deformation of damage reinforced beam was smaller than that of unreinforced concrete beam. Compared with unreinforced concrete beams, the flexural capacity of undamaged reinforced beams and damaged reinforced beams increased by 13.6% and 16.7%, respectively. The elastic recovery of the reinforced beam during unloading was obvious. Interface stripping was not occurred during loading. Research results can provide reference for evaluating the reinforcement effect of bridge structure by carbon fiber net.更多还原