Bond behavior of reinforced concrete after coupling effect of
sustained load and chloride ion erosion
1. School of Civil Engineering, Qingdao University of Technology, Qingdao, Shandong 266033, China; 2. Key Laboratory of Green Building in Western China, Xi′an, Shaanxi 710055, China
Abstract：Due to the coupling effect of sustained load and chloride ion erosion on reinforced concrete structures in coastal areas during service, the deterioration of reinforced concrete performance is caused， and the bond performance among reinforced concretes is affected. 24 reinforced concrete beam specimens with crack in bonding zone were designed and manufactured. The bond strength changes of reinforced concrete for 120 days under three work conditions of sustained load, chloride ion erosion and coupling action of sustained load and chloride ion erosion were investigated by beam test. The experimental results show that the coupling effect of sustained load and chloride ion erosion significantly reduces the bond strength between steel bar and concrete. The larger the sustained load is, the lower the bond strength becomes. Under the coupling action of sustained load and chloride ion erosion, the loss of bond strength of specimens is greater than that under the action of single factor.
2019, Vol. 40 
