Fiber-reinforced polymer (FRP) composites have been widely used in civil engineering for either strengthening existing deteriorated reinforced concrete (RC) structures or constructing new structures. Recently, a new category of FRP composites with a large rupture strain (i.e., referred to as “LRS FRP” in this article) has become increasingly popular. In contrast with conventional FRP composites, LRS FRP composites possess a larger elongation and a lower modulus of elasticity. Since the ultimate state of structures with FRP strengthening generally depends on fracture of the FRP, it is expected that an increase in FRP rupture strain leads to a better performance of structures and LRS FRP composites are particularly suitable for enhancing ductility of structures. This paper presents a state-of-the-art review on the basic characteristics of LRS FRP composites and structural usage of LRS FRP composites (including concrete confined with LRS FRP composites), with further research opportunities associated with LRS FRP composites in structural engineering applications being identified.

纤维增强聚合物（FRP）复合材料已广泛用于土木工程中，以增强现有的劣化钢筋混凝土（RC）结构或建造新结构。最近，具有大断裂应变的新型FRP复合材料（即本文中称为“ LRS FRP”）已变得越来越流行。与传统的FRP复合材料相比，LRS FRP复合材料具有较大的伸长率和较低的弹性模量。由于具有FRP增强的结构的最终状态通常取决于FRP的断裂，因此可以预期FRP断裂应变的增加会导致结构更好的性能，并且LRS FRP复合材料特别适用于增强结构的延展性。