Non-uniform corrosion characteristics and mechanical properties of serious corroded reinforcement in marine concrete
Taking the corroded reinforcement in memeber of the 35-year high pile wharf prototype as an research object,we obtain the non-uniform corrosion characteristics of reinforcement by 3D scanning,and study the effect of corrosion rate on mechanical properties degradation by tensile test.Base on the analysis and regression test data,we build a formula for calculating the relationship between the mass loss rate of corroded reinforcement and the maximum section loss rate,obtain the regression formulas for the mechanical properties of corroded reinforcement in offshore concrete members,such as nominal yield strength and nominal ultimate strength,and compare with existing formulas.The results show that with the increase of steel corrosion degree,the non-uniformity of corrosion is intensified,and the maximum section loss rate of reinforcement with the same mass loss rate increases correspondingly.At the same time,parameters such as nominal yield strength,nominal ultimate strength and ultimate strain degrade to varying degrees,and the yield platform disappears gradually.The proposed regression formula can more accurately describe the degradation law of mechanical properties of corroded reinforcement in marine concrete structures.
non-uniform corrosionreinforcementmechanical propertystructure in service
万方数据
维普
