Research progress on durability of FRP bars reinforced concrete structures
Dong Zhiqiang1 Wu Gang1,2
1. Key Laboratory for Concrete and Prestressed Concrete Structures of the Ministry of Education, Southeast University, Nanjing 211189, China;
2. National Prestress Engineering Research Center, Southeast University, Nanjing 211189, China
Abstract： It’s generally believed that, in harsh service environments, the use of fiber reinforced polymer (FRP) bars instead of ordinary steel bars, can effectively enhance the durability of concrete structures. However, studies have shown that FRP bars are not completely immune to service environments, and their durability in corrosive environment has been one of the key problems that restricted their application in civil engineering. This work systematically summarizes the research progress on the durability of FRP bars reinforced concrete (RC) structures in three aspects: ① Experimental investigations. The experimental research progress on durability of FRP bars RC structures at home and abroad in recent decades has been systematically reviewed from three levels, namely, FRP bars themselves, bond between FRP bars and concrete, and FRP bars RC members. ② Long-term performance prediction methods. The existing long-term performance prediction models and theories for FRP bars are summarized. ③ Design methodologies. The design methodologies of durability of FRP bars RC structures in different countries are introduced and compared. The review work in this study is of great significance to improve the design level and promote the wide application of FRP bars RC structures in China.
