Cables play an important role in cable-stayed systems, but are vulnerable to corrosion and fatigue damage. There is a dearth of studies on the fatigue damage evolution of corroded cable. In the present study, the acoustic emission (AE) technology is adopted to monitor the fatigue damage evolution process. First, the relationship between stress and strain is determined through a tensile test for corroded and non-corroded steel wires. Results show that the mechanical performance of corroded cables is changed considerably. The AE characteristic parameters for fatigue damage are then established. AE energy cumulative parameters can accurately describe the fatigue damage evolution of corroded cables. The failure modes in each phase as well as the type of acoustic emission source are determined based on the results of scanning electron microscopy. The waveform characteristics, damage types, and frequency distribution of the corroded cable at different damage phases are collected. Finally, the number of broken wires and breakage time of the cables are determined according to the variation in the margin index.
References
[1]
Sih, G.C.; Tang, X.S.; Li, Z.X.; Li, A.Q.; Tang, K.K. Fatigue crack growth behavior of cables and steel wires for the cable-stayed portion of Runyang bridge: Disproportionate loosening and/or tightening of cables. Theor. Appl. Fract. Mech. 2008, 49, 1–25, doi:10.1016/j.tafmec.2007.10.008.
[2]
Mahmoud, K.M. Fracture strength for a high strength steel bridge cable wire with a surface crack. J. Theor. Appl. Fract. Mech. 2007, 48, 152–160, doi:10.1016/j.tafmec.2007.05.006.
[3]
Li, C.X.; Tang, X.S.; Xiang, G.B. Fatigue crack growth of cable steel wires in a suspension bridge: Multiscaling and mesoscopic fracture mechanics. Theor. Appl. Fract. Mech. 2010, 53, 113–126, doi:10.1016/j.tafmec.2010.03.002.
Wang, G.A.; Wang, M.L.; Zhao, Y.A. Application of EM stress sensors in large steel cables. Sens. Issues Civ. Struct. Health Monit. 2005, doi:10.1007/1-4020-3661-2_15..
[6]
Coultate, K. Techniques used in the magnestic inspection of wire ropes. Insight. 1998, 40, 89–91.
[7]
Li, J.S.; Yang, S.Z.; Lu, W.X.; Wang, Y.S. Space domain feature-based automatic quantitative determination of localised faults in wire ropes. Mater. Eval. 1990, 48, 336–341.
[8]
Casy, N.F. Fatigue testing of large wire ropes. Wire Ind. 1988, 55, 300–303.
[9]
Kova, J.; Leban, M.; Legat, A. Detection of SCC on prestressing steel wire by the simultaneous use of electrochemical noise and acoustic emission measurements. Electrochim. Acta. 2007, 52, 7607–7616, doi:10.1016/j.electacta.2006.12.085.
[10]
Nair, A.; Cai, C.S. Acoustic emission monitoring of bridges: Review and case studies. Eng. Struct. 2010, 32, 1704–1714, doi:10.1016/j.engstruct.2010.02.020.
[11]
Oskouei, A.R.; Zucchelli, A.; Ahmadi, M.; Minak, G. An integrated approach based on acoustic emission and mechanical information to evaluate the delamination fracture toughness at mode I in composite laminate. Mater. Des. 2011, 32, 1444–1555, doi:10.1016/j.matdes.2010.08.048.
[12]
Casey, N.F.; Laura, P.A.A. A review of the acoustic emission monitoring of wire rope. Ocean Eng. 1997, 24, 935–947, doi:10.1016/S0029-8018(96)00052-2.
[13]
Casey, N.F.; Taylor, J.L.; Holford, K.M. Wire break detection during tensile fatigue testing of 40 mm wire rope. Br. J. Nondestruct. Test 1985, 30, 338–341.
[14]
Casey, N.F.; White, H.; Taylor, J.L. Frequency analysis of the signals generated by the failure of constituent wires of a wire rope. NDT Int. 1989, 56, 583–586.
[15]
Yuyama, S.; Yokoyama, K.; Niitani, K.; Ohtsu, M.; Uomoto, T. Detection and evaluation of failures in high-strength tendon of prestressed concrete bridges by acoustic emission. Constr. Build. Mater. 2007, 21, 491–500, doi:10.1016/j.conbuildmat.2006.04.010.
[16]
Drummond, G.; Watson, J.F.; Acarnley, P.P. Acoustic emission from wire ropes during proof load and fatigue testing. NDT&E Int. 2007, 40, 94–101, doi:10.1016/j.ndteint.2006.07.005.
