STUDY OF EFFECT OF CORROSION ON STEEL TRUSS BRIDGES

Abstract

Corrosion is the degradation of a substance because of a reaction with its surroundings. The term "degradation" refers to the loss of a material's physical qualities. This can be a material's weakening due to a reduction in cross-sectional area, a metal's shattering due to hydrogen embrittlement. The method presented in this study can be used to determine the remaining fatigue life of railway bridge members that have been subjected to time-dependent corrosion. The approach considers the impacts of material loss owing to general (uniform) corrosion as well as material fatigue strength deterioration due to corrosive environments. The stress history, which is generated by considering the effect of time-dependent material loss and the full-range S–N curve. To predict the fatigue life of structure, finite element modeling of the bridge has been done in SAP-2000 and dynamic loading of trains is applied as per RDSO guidelines and stress is generated from software for member of bridge, after obtaining stress for a particular member that stress is used to calculate the load and that load is applied in ANSYS software to determine the fatigue life of structure.