科研之友
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摘要
In subtropical regions, fiber reinforced polymer (FRP) used to strengthen concrete bridge structures typically work in hot-wet environment and cyclic vehicle loading.For such FRP reinforced concrete structures, environmental fatigue performance of the interface between FRP and concrete is extremely important to the durability of the structures.In order to investigate the fatigue performance of the interface between FRP and concrete after wet-heat pretreatment, the double shear specimens with carbon fiber laminate (CFL) reinforced concrete members were produced, and the experimental study on fatigue performance of the interface between CFL and concrete in hot-wet environment (60℃, 95%) was carried out.The results show that hot-wet environment can adversely affect the CFL-concrete interface, the fatigue lives of specimens after hot-wet pretreatment significantly reduced compared with untreated specimens, and higher the load level is, the greater reduction of the fatigue life decrease.
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