CFRP tendons with smooth surface conditions have good applicability in prestressed structures and structural reinforcement because of their high load-carrying capacity and simple production. However, they are difficult to anchor reliably. This paper developed an improved wedge-type anchor for large-diameter CFRP tendons. The mechanical behavior analysis theories of wedge-type anchors, including the load-carrying capacity evaluation model, were presented. The friction behavior of the sand-coated sleeve-tendon, which was used to evaluate the load-carrying capacity of the anchor, was experimentally investigated. The influence laws of the main wedge-type anchor parameters on the mechanical behavior of the anchor were obtained through theoretical analysis. Then, the optimal anchorage system design method was proposed, and the optimal anchor designs for smooth CFRP tendons with various diameters were presented. The anchor performance was experimentally evaluated, and the sleeve-tendon interface friction coefficient was approximately doubled after optimization, reaching 0.475. The wedge and barrel cone angles, preset load and anchor length had significant effects on the mechanical behavior of the anchor. The optimal design anchors for smooth CFRP tendons with diameters of 10 mm and 12.7 mm and spiral-wrapped CFRP tendons with diameters of 10 mm reached failure loads up to 93.8, 91.2 and 95.4% of the tensile capacity of the tendons, respectively.

表面光滑的CFRP筋由于承载能力高、制作简单，在预应力结构和结构加固中具有良好的适用性。然而，它们难以可靠地锚定。本文开发了一种用于大直径 CFRP 筋的改进楔形锚栓。提出了楔形锚杆的力学行为分析理论，包括承载能力评价模型。通过实验研究了用于评估锚杆承载能力的涂砂套筒-肌腱的摩擦行为。通过理论分析得出楔形锚杆主要参数对锚杆力学行为的影响规律。然后，提出了最优锚固系统设计方法，并提出了各种直径的光滑 CFRP 筋的最佳锚固设计。通过实验评估锚固性能，优化后套筒-肌腱界面摩擦系数增加约一倍，达到0.475。楔形和筒形锥角、预设载荷和锚长度对锚的力学性能有显着影响。直径为10 mm和12.7 mm的光滑CFRP筋和直径为10 mm的螺旋缠绕CFRP筋的优化设计锚栓的破坏载荷分别达到了筋抗拉能力的93.8%、91.2%和95.4%。475. 楔形和桶锥角、预设载荷和锚长度对锚的机械性能有显着影响。直径为10 mm和12.7 mm的光滑CFRP筋和直径为10 mm的螺旋缠绕CFRP筋的优化设计锚栓的破坏载荷分别达到了筋抗拉能力的93.8%、91.2%和95.4%。475. 楔形和桶锥角、预设载荷和锚长度对锚的机械性能有显着影响。直径为10 mm和12.7 mm的光滑CFRP筋和直径为10 mm的螺旋缠绕CFRP筋的优化设计锚栓的破坏载荷分别达到了筋抗拉能力的93.8%、91.2%和95.4%。