ABSTRACT
The corrosive environment often leads to corrosion pits in the internal high-strength steel wires of long-span bridge suspenders during the operation period, which seriously impairs their mechanical properties and even causes corrosion fatigue damage. Therefore, it is very important to obtain the mechanical properties of corroded steel wire with corrosion pits for the service life analysis of the suspender during the operation period. In this paper, a method to establish the model of high-strength steel wire with corrosion pits based on 3D reconstruction technology is proposed. The information of apparent corrosion pit depth of steel wire scanned by super depth microscope is used to generate 3D point cloud model of steel wire segments with corrosion pits. Based on the point cloud model, the 3D mesh model, surface model and solid model were gradually generated by the software to realize the visualization of the high-strength steel wire with corrosion pit defects. Finally, the fatigue performance of the steel wire model with corrosion pit was analyzed by the finite element software. The method proposed in this paper is based on the actual corroded high-strength steel wire to establish a three-dimensional model and perform performance analysis, which can complement the corroded fatigue test and has theoretical significance for the safety assessment of bridge suspenders during their service life.
