Experimental Study on Corrosion Fatigue Performance of High-Strength Steel Wire with Initial Defect for Bridge Cable  
[PERSON] 1,*  
1 Jiangsu Key Laboratory of Engineering Mechanics, Southeast University, Nanjing 211189, China; [EMAIL_ADDRESS] (W.Z. ); [EMAIL_ADDRESS] (Y.Z.) Department of Civil Engineering, School of Engineering, University of Tokyo, Tokyo 113-8656, Japan  
* 2  
and it is a serious failure form. Corrosive medium and fatigue load are the two core factors that affect the durability of cable steel wire. At present, most research only focuses on the influence of one of these two factors on the durability of steel wire, without considering their coupled effect. In terms of theoretical research, [PERSON] [6] developed a continuum damage model and an algorithm to simulate the corrosion fatigue process of high-strength steel wires used in bridge cables. The developed model was used to predict the damage curves during the corrosion fatigue process based on the concept of continuum damage mechanics (CDM), and the algorithm was used to simulate the damage evolution process from local damage to failure. [PERSON] [7] developed a numerical simulation method for the damage evolution of high-strength steel wire in bridge cables under the action of pre-corrosion and fatigue. Based on pitting accelerated crack nucleation theory in combination with continuum mechanics, cellular automata technology (CA) and finite element (FE) analysis, the damage evolution process of steel wire under pre-corrosion and fatigue was simulated. [PERSON] [8] proposed a stochastic time-variant reliability assessment method to evaluate the safety of suspenders, where the time-variant model for deterioration of steel wires and probabilistic critical limit states based on crack depth and failure area were integrated, so as to consider the combined effect of corrosion and cyclic loading. In terms of experimental research, [PERSON] [9] confirmed that the more serious the corrosion degree, the shorter the fatigue life of steel wire according to the fatigue test of artificial corroded steel wire. [PERSON] [10] believed that the sharper the notch shape, the shorter the fatigue life of steel wire with machine-cut notch according to the comparison between mechanical properties of steel wire with notches and corroded steel wire. [PERSON] [11] found that the shortening of fatigue life was mainly caused by the combined action of the initiation of corrosion pits, anode dissolution at the crack tip and hydrogen embrittlement. [PERSON] [12] believed that the main reason leading to the fatigue performance deterioration of steel wire was corrosion pits on the steel wire surface. Stress concentration accelerated crack initiation and reduced fatigue life. By comparing the fatigue test results of corroded steel wire under different humidity conditions, it was found that the fatigue life of steel wire with the same degree of corrosion in a wet environment was lower than that in a dry environment. Based on experimental data, [PERSON] [13] established the empirical relationship between corrosion pit depth and CF life and obtained the empirical formula for predicting fatigue life. There is also much work on the fatigue S-N curve. [PERSON] et al. [14] proposed a novel probabilistic method, termed the S-N Paris law (SNPL) method, to quantify the uncertainties underlying the Paris' law parameters, by finding the best estimates of their statistical parameters from the S-N curve data using a Bayesian approach. [PERSON] et al. [15] developed an estimation method for micropitting life. They established a S-N curve by using data from rolling contact fatigue tests and estimated histories of near-surface stresses (stress history) to reflect the relationship between micropitting life and stresses acting in the region affected by surface asperities (near-surface stress). [PERSON] [16] mentioned conventional design codes based on their recommendations still on the common prejudice that an \"endurance limit\" exists.