In order to study the safety of transmission towers under material corrosion,a bearing capacity degradation model of galvanized steel for transmission towers after corrosion is established through numerical simulation methods combined with experimental data.The corrosion effect is achieved by introducing material mechanical parameters and constitutive models obtained from artificial corrosion tests into the model.On the basis of refined finite element modeling,wind loads are applied to each key point of the structure,and the maximum response of model key points and tower legs with different degrees of corrosion is calculated using a step-by-step loading method to determine the ultimate bearing capacity of the structure.The results show that due to corrosion,the quality and stiffness of the structure decrease,and the fundamental frequency of the structure continuously decreases with the increase of corrosion time.When the steel corrosion cycle is 1200 h and 4200 h,the bearing capacity of transmission towers deteriorates by 4.2%and 5.3%,respectively.
wind loadcorrosiontransmission towerfinite element model
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