碳纤维增强复合材料编织网混凝土梁试验研究

将碳纤维增强复合材料（CFRP）编织成正交网格，并经环氧树脂胶固化形成受力骨架，代替钢筋混凝土梁中的钢筋，以解决普通钢筋混凝土中钢筋易锈蚀的问题。通过对3根不同配筋率的CFRP编织网混凝土梁的弯曲性能试验，观察在各级荷载作用下构件的应变变化、挠度发展、破坏过程及破坏特征，对其受弯承载力及抗弯刚度等弯曲性能进行分析。试验结果表明：CFRP编织网与混凝土有良好的粘结性能，二者协同受力性能良好；破坏前，试件有明显的塑性变形，有明显的破坏预兆，延性性能较好；随着配筋率的提升，构件承载能力、抗弯刚度较大幅度提升。试件破坏时，CFRP编织网纵向受力筋均未达到其抗拉强度，故在以后的试验中可对编织网的纵向受力筋施加一定的预应力，以提高CFRP编织网的利用率。

Experimental research on concrete beam with CFRP braided net

Carbon Fiber Reinforced Polymer (CFRP) is woven into orthogonal grids and cured with epoxy resin to form a stress skeleton, which replaces the reinforcement in reinforced concrete beams, so as to solve the problem of corrosion of reinforcement in ordinary reinforced concrete. Through the bending tests of three CFRP net concrete beams with different reinforcement ratios, the strain change, deflection development, failure process and failure characteristics of the members under various loads are observed, and the bending capacity and flexural rigidity are analyzed. The test results show that CFRP fabric braided net have good bonding performance and good synergistic mechanical performance with concrete; Before the failure, the specimen has obvious plastic deformation and failure warning obviously, showed better ductility; with the increase of reinforcement ratio, the bearing capacity and flexural rigidity of members are greatly improved. When the specimens are destroyed, None of the longitudinal bars of CFRP braided nets have reached their tensile strength. Therefore, in the future test, the longitudinal tendons of the braided net can be prestressed to improve the utilization ratio of CFRP braided net.