This paper presents experimental results of double-lap steel Glass Fiber Reinforced Polymer (GFRP) bonded joints which were subjected to fatigue loading after different harsh environmental aging. Bonded joints were manufactured, cured, and tested to study the fatigue behaviors of the GFRP-steel bonded specimens after hygrothermal aging. Experimental results indicated that the hygrothermal environment could negatively affect the fatigue performance of the bonded specimens. In particular, in comparison with the reference specimens, the most significant reduction of fatigue life for harsh cured specimens was 61.2% when the load level was 70% of the ultimate tensile strength. Finally, based on the analysis of the energy dissipation in each load cycle, relative energy dissipation E_re of each specimen was proposed, by which the accelerating point of N_ac was obtained to quantify the damage evolution of the bonding joints under cyclic load after being cured in a certain hygrothermal environment.

本文介绍了双搭接钢化玻璃纤维增​​强聚合物（GFRP）粘结接头的实验结果，该接头在不同的恶劣环境老化条件下承受疲劳载荷。制造，固化和测试粘合接头以研究GFRP-钢粘合试样在湿热老化后的疲劳行为。实验结果表明，湿热环境可能会对粘结试样的疲劳性能产生负面影响。特别是，与参考样品相比，当载荷水平为极限抗拉强度的70％时，苛刻固化样品的疲劳寿命降低幅度最大为61.2％。最后，基于每个负载周期的能耗分析，相对能耗E _re的各试样提出，通过该加速点Ñ_交流获得在一定的湿热环境下在固化后进行量化循环负荷下的接合关节的损伤演化。