Calculation Method of Stress Concentration Factor of Suspender with Upper and Lower Corroded Ball Pit

Abstract

The invention discloses a method for calculating the stress concentration factor of a suspender with two corrosion pits on the upper and lower sides, which is characterized in that the distance L between the two corrosion pits on the suspender, the radius r of the corrosion pit on the suspender, and the depth of the corrosion pit are considered d and the functional relationship between the diameter D of the suspender and the stress concentration factor K of the corroded suspender. By establishing a model and calculating based on the model, multiple sets of stress concentration data are obtained, and the data are fitted to obtain the stress concentration coefficient K of the corroded suspender. the expression. This expression can replace the finite element method to obtain the stress concentration factor of the corroded suspender with upper and lower corrosion pits, thereby simplifying the calculation of the stress concentration factor of this kind of corroded suspender, and providing a basis for calculating the corroded suspender with upper and lower corrosion pits in subsequent projects. The rod stress concentration factor provides a quick and easy method, which solves the time-consuming and complicated problem of calculating with the finite element method, saving time and cost.

Description

technical field [0001] The invention relates to the field of bridge suspender corrosion, in particular to a method for calculating the stress concentration factor of a suspender with upper and lower corroded ball pits. Background technique [0002] Suspenders are important force-transmitting structures in cable bridges such as arch bridges and suspension bridges, ensuring their safety is directly related to the safety of the entire structure. However, due to the complex environment, it will inevitably be damaged with the extension of the service period. It is manifested by the appearance of multiple corrosion pits on the surface of the suspender. The existence of these corrosion pits will weaken the cross section of the suspender and cause stress concentration on the suspender, and there is still mutual influence between the corrosion pits. However, the existing research results have not calculated the stress concentration calculation method under multiple corrosion pits. T...

AI Technical Summary

Problems solved by technology

However, the existing research results have not calculated the stress concentration calculation method under multiple corrosion pits. Therefore, in order to better judge the danger of the corrosion phenomenon with the upper and lower corrosion pits on the suspender surface to the weakening of the suspender section, the present invention introduces The stress concentration factor is an important indicator for judging the structural safety of the corroded boom with upper and lower corrosion pits on the surface of the boom. At the same time, a method for quickly calculating the stress concentration factor of the corroded boom with upper and lower corrosion pits on the surface of the boom is proposed. necessary

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