In this study, the chloride ion diffusion and structural performance of beams reinforced with textile-reinforced concrete (TRC) were evaluated. The parameters investigated were chloride concentration, sustained load and number of textile layers. The results demonstrate that the content and diffusion coefficient of chloride increased with increasing chloride concentration. Higher chloride concentrations accelerated the crack propagation and deflection changes and caused the reduction of the load-carrying capacity of the beams. The sustained load promoted the chloride transport of the TRC, increasing the chloride ion content and diffusion coefficient and causing substantial damage to the microstructure of the TRC. In addition, the performance (such as cracking resistance, deflection and flexural capacity) of beams with a large sustained load ratio decreased to a less extent than did the performance of the unloaded beams. The content and diffusion coefficient of chloride in the unstrengthened beams were obviously larger than those in the strengthened beams, but increasing the textile layers number had little influence on these factors. In addition, for the unstrengthened beams, the cracks and deflections developed rapidly, and the load decreased greatly, especially the cracking load. Finally, in accordance with Fick’s second law of diffusion, a chloride diffusion equation in TRC layers under new boundary conditions was proposed.

在这项研究中，评估了纤维增强混凝土（TRC）增强梁的氯离子扩散和结构性能。研究的参数是氯化物浓度，持续载荷和织物层数。结果表明，氯化物的含量和扩散系数随氯化物浓度的增加而增加。较高的氯化物浓度加速了裂纹的扩展和挠度变化，并导致梁的承载能力降低。持续的负载促进了TRC的氯离子传输，增加了氯离子含量和扩散系数，并对TRC的微观结构造成了实质性损害。此外，性能（例如抗裂性，持续荷载比大的梁的挠度和挠曲能力的减小程度要小于未加载梁的性能。未增强梁中氯化物的含量和扩散系数明显大于增强梁中氯化物的含量和扩散系数，但增加织物层数对这些因素影响不大。此外，对于未加强的梁，裂缝和挠度迅速发展，载荷大大降低，尤其是裂缝载荷。最后，根据菲克第二扩散定律，提出了新边界条件下TRC层中氯离子​​的扩散方程。未增强梁中氯化物的含量和扩散系数明显大于增强梁中氯化物的含量和扩散系数，但增加织物层数对这些因素影响不大。此外，对于未加强的梁，裂缝和挠度迅速发展，载荷大大降低，尤其是裂缝载荷。最后，根据菲克第二扩散定律，提出了新边界条件下TRC层中氯离子​​的扩散方程。未增强梁中氯化物的含量和扩散系数明显大于增强梁中氯化物的含量和扩散系数，但增加织物层数对这些因素影响不大。此外，对于未加强的梁，裂缝和挠度迅速发展，载荷大大降低，尤其是裂缝载荷。最后，根据菲克第二扩散定律，提出了新边界条件下TRC层中氯离子​​的扩散方程。