Magnetic NDT and Computer Modeling of Steel Rope Deterioration in Suspended Bridges

Abstract:

A combined approach to strength assessment of stay ropes in suspension bridges is considered. The rope working condition is being analyzed by following steps: in-situ magnetic testing of rope structure, computational assessment of ultimate breaking load and evaluation of residual margin of safety. The diagnostic parameters distributed and/or local faults in wires are used as input data for mechanical model of rope structure. The model enables to calculate the stresses in each wire and to simulate the step-wise degradation process thus estimating the rope residual breaking tensile load. The safety factor of deteriorated rope is considered as a generalized parameter that specifies the rope safe operation as an element of bridge stay arrangement. Examples of integrity analysis of stranded stay ropes and locked coil stay ropes are presented.

• Periodical: Key Engineering Materials (Volumes 569-570)
• Pages: 1101-1108
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.569-570.1101
• Online since: July 2013
• Authors: Alexander Vorontsov, Alexander Zhirnov, Dmitry Sukhorukov
• Keywords: Breaking Load Simulation, Deterioration, Magnetic Testing, Safety Factor, Stay Wire Rope

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