In this study the durability of the bond between different fibre reinforced polymer (FRP) tubes and seawater sea sand concrete (SWSSC) under seawater condition is investigated. Concrete filled pultruded glass fibre reinforced polymer (GFRP) tubes and filament winding GFRP, carbon fibre reinforced polymer (CFRP) and basalt fibre reinforced polymer (BFRP) tubes were exposed to seawater at 25 °C and 40 °C for 1, 3 and 6 months. Push-out tests were carried out to study the bond performance of concrete filled FRP tubes (CFFT). The bond strength changes compared to the reference samples, in terms of the mechanical and chemical bonds, were calculated. The results showed that for all cases except one condition that had the same value as the reference, the maximum bond strength of the tubes increased due to the conditioning, however, the bond strength at the chemical adhesion breaking moment decreased by the conditioning. In other words, the friction coefficients of the samples increased due to conditioning, while the chemical adhesion decreased. Equations are proposed to predict the bond strength corresponding to slip initiations.

在这项研究中，研究了在海水条件下不同纤维增强聚合物（FRP）管与海水海砂混凝土（SWSSC）之间的粘结耐久性。填充混凝土的拉挤玻璃纤维增​​强聚合物（GFRP）管和长丝缠绕GFRP，碳纤维增强聚合物（CFRP）和玄武岩纤维增强聚合物（BFRP）管在25°C和40°C的海水中暴露1、3和6几个月。进行推出试验来研究混凝土填充的FRP管的粘结性能（CFFT）。根据机械和化学键，计算了与参考样品相比的键强度变化。结果表明，对于所有情况，除了一种条件具有与参考值相同的条件外，由于进行了调节，管的最大粘结强度有所提高，但是，通过调节，在化学粘合破坏时刻的粘合强度降低。换句话说，样品的摩擦系数由于调节而增加，而化学粘附力降低。提出方程来预测与滑移起始相对应的粘结强度。