BOND BEHAVIOR OF FRP-CONCRETE WET-DRY CYCLES
Strengthening concrete structure with fiber-reinforced polymer(FRP)is rapidly becoming a repair and rehabilitation technique of choice in the civil engineering.However,there is insufficient information on the durability of bond between FRP and concrete exposed to aggressive environmental conditions,especially in wet-dry condition with immersion in salt solution.This paper presents an experimental program to examine the bonded interfacial behavior of FRP-concrete under wet-dry cycles and sustained load.The type of specimen used in this study is a double lap shear specimen.A wet-dry cycle was completed by immersing the specimens in salt solution(5g/l water)for 12 hours,followed by 12 hours drying at room temperature.A sustained load was provided by applying 30%or 60%of the initial ultimate load.The type of FRP,number of wet-dry cycles and stress level as the parameters were considered.The results indicated that the failure mode of specimens changed from cohesive failure to debonding between concrete and adhesive.The ultimate load and maximum shear stress of the joint increased slightly and then decreased under wet-dry cycles,and the sustained load aggravated this degradation.
FRP concrete wet-dry durability
Shan Li Tao Zhu Yiyan Lu
School of Civil Engineering,Wuhan University,Wuhan,China
国际会议
新加坡
英文
1-5
2017-07-19（万方平台首次上网日期，不代表论文的发表时间）