Effects of corrosion and pre-fatigue damage on the mechanical properties of HRB400E rebars
Zhaoyang Tang, Chuntao Zhang
Abstract
This research endeavors to examine the influence of corrosion and fatigue on the mechanical characteristics of HRB400E rebars . First, the remaining mechanical characteristics of HRB400E rebars after corrosion were assessed, followed by a fatigue test of the corroded HRB400E rebars. Then, tensile tests were conducted on these pre-damaged specimens to acquire stress-strain curves and relevant mechanical properties. The investigation revealed that the combined impact of corrosion and fatigue has a notable influence on the mechanical characteristics of HRB400E rebars. The yield strength , ultimate strength, and ductility of the HRB400E rebars decreased significantly, while the modulus of elasticity remained unaltered. To assess this combined effect of corrosion and fatigue, a parameter α was introduced. The value of α can effectively evaluate the impact of the combined effects of corrosion and fatigue on the mechanical properties of HRB400E rebars.