Dynamic stress-strain relationship of concrete subjected to chloride and sulfate attack

The corrosion of sulfate and chloride salt on concrete has always been an important issue which the multitudinous scholars pay attention, although many of them have carried out fruitful researches on this area, the mechanical responses of concrete corroded by chloride ion and sulfate ions under dynamic loading should be further studied. This article is proposes to explore the relationship between stress and strain of concrete which have been immersed in sodium chloride and sodium sulfate solution, and the dynamic tests of the specimens were carried out at the same time. The dynamic stress-strain curves obtained from tests, theory of statistical damage and Weibull distribution were employed to establish a dynamic statistical damage stress-strain relational model of corroded concrete. The results show that, the damage that defined by the micro-unit inside the concrete can be effectively used to establish this model, and the theoretical curves were in good agreement with experimental curves, which indicates that the established relational model can provide a more accurate description of the dynamic mechanical responses of salt-corroded concrete under dynamic loading, and give some suggestions to durability inspection, service status evaluation, anti-dynamic loading design, seismic design and numerical simulation, etc. (C) 2018 Elsevier Ltd. All rights reserved.