The objective of this research is to investigate the seismic performance of typical confined masonry (CM) walls under acidic atmospheric environment and to then present a hysteretic model precise, which is capable of simulating seismic performance of CM walls under acid corrosion. Hence, quasi-static tests of six CM walls were performed, which were corroded by artificial climate accelerated corrosion testing techniques. By obtaining the damage process and characteristics, the influence of different corrosion cycles on displacement-load hysteretic curve, skeleton curve, stiffness degradation and energy dissipation capacity were extensively studied. Moreover, the degradation law of specimen mechanical properties were also obtained. The cycle degradation indices was proposed based on energy dissipation, which were used to characterize the degradation law of specimen mechanical properties. Subsequently, the hysteretic model of CM walls was established, where the specific hysteretic rule was also obtained. The results demonstrated that the ultimate bearing capacity, initial stiffness and energy dissipation capacity of the specimen could all gradually decrease with the increase in the number of corrosion cycles, where the decay rate of the stiffness would gradually increase. The proposed hysteretic model can desirably reflect the hysteretic characteristics of CM walls with reversed loading in an acidic atmospheric environment.
