During recent decades, fiber-reinforced polymers have been widely used as an alternative to steel in different engineering fields. The purpose of the current paper is to simulate nail-grout interface in soil-nail systems and to evaluate glass-fiber-reinforced polymers nail as an alternative for conventional steel nails. Although numerous studies have been performed on pullout behavior and creep tests of fiber-reinforced polymer and steel rebar in concrete, the behaviors of glass-fiber-reinforced polymer nails are not well investigated yet. A model to predict the maximum creep displacements of glass-fiber-reinforced polymer nails was developed and calibrated based on experimental creep tests. As such, beginning with presenting the results of several experimental pullout tests with different embedded lengths, to reach the length in which bond stress increment will be negligible, bond stress at nail-grout interface was evaluated with steel and glass-fiber-reinforced polymer nails. Then, time-dependent tests with both glass-fiber-reinforced polymer and steel nails have been carried out under sustained loads which were fractions of ultimate pullout loads. It was clearly noticed that creep displacements are lower with glass-fiber-reinforced polymer nail than steel.

在最近的几十年中，纤维增强聚合物已在不同的工程领域中广泛用作钢的替代品。本文的目的是模拟土壤钉系统中的钉浆界面，并评估玻璃纤维增​​强的聚合物钉作为常规钢钉的替代方案。尽管已对纤维增强聚合物和钢筋在混凝土中的拉拔性能和蠕变测试进行了大量研究，但对玻璃纤维增​​强聚合物钉的性能尚未进行充分研究。基于实验蠕变试验，开发并校准了预测玻璃纤维增​​强聚合物钉的最大蠕变位移的模型。因此，首先要介绍几种具有不同嵌入长度的拉拔试验的结果，为了达到可忽略不计的粘结应力的长度，用钢和玻璃纤维增​​强的聚合物钉对指甲浆界面的粘结应力进行了评估。然后，使用玻璃纤维增​​强的聚合物和钢钉进行了与时间有关的测试，该测试是在持续载荷下进行的，该载荷是极限拉拔载荷的一部分。清楚地注意到，玻璃纤维增​​强的聚合物钉的蠕变位移低于钢。