Debonding failures are a common problem in concrete bridge decks strengthened with adhesively attached carbon-fibre reinforced polymer (CFRP) strips. Accordingly, in this study, rectangular concrete slabs strengthened with CFRP have been experimentally evaluated to simulate the strengthening of T-beam and box girder slabs. The resulting static load data have been used to compare the effects of four different anchoring methods in terms of crack distribution, deflection, reinforcing steel strain curve, and CFRP strain distribution. The most suitable bridge deck strengthening anchoring method has been then identified and analysed using extant strengthening design methods. The results show that the most practical anchoring method is the use of open CFRP strips attached with concentrated adhesive. The findings of this study indicate that when strengthening T-girder bridges, more than two CFRP anchorage strips should be evenly spaced within the extension of the anchorage length, while for box girder bridges, even more evenly spaced strips should be used. This research and its conclusions can be used as a reference for the improved design of bridge deck strengthening.

中文翻译：

---

锚固CFRP加固混凝土桥面板的方法比较

在粘结性碳纤维增强聚合物（CFRP）条加固的混凝土桥面板中，脱胶失败是一个常见问题。因此，在这项研究中，已经对用CFRP加固的矩形混凝土板进行了实验评估，以模拟T型梁和箱形梁板的加固。所得的静载荷数据已用于比较四种不同锚固方法在裂纹分布，挠度，钢筋应变曲线和CFRP应变分布方面的效果。然后，使用现有的加固设计方法确定并分析了最合适的桥面板加固锚固方法。结果表明，最实用的锚固方法是使用开放的CFRP条带和浓缩粘合剂。这项研究的结果表明，在加固T型梁桥时，应在锚固长度的延长范围内均匀分布两个以上的CFRP锚固带，而对于箱形梁桥，则应使用更均匀间隔的带。该研究及其结论可为桥梁桥面加固设计的改进提供参考。