Category: Monitoring methods in transport systems


Grachev A.A. , Nikitin G.I. , Plotnikov D. G. , Banite A. V. , Bortiakov D.E. , Gabriel A.S.

The article presents a technique for automating the calculation of local stresses from the application of a concentrated load on additional structural elements of box-section spans with riding beams based on continuous monitoring data to assess the current technical condition and then predict the state of the structure. The necessity of applying an analytical approach to assessing the stress-strain state of a structure at the initial stages of design and technical operation has been substantiated. The drawbacks of the existing analytical approach to stress assessment are shown. Taking into account the available resources, an acceptable research program was developed and implemented, which would lead to satisfactory results. In accordance with the program, a series of numerical experiments was carried out using software that makes it possible to simulate complex structures and solve them using the fi nite element method, aimed at obtaining an array of data, the use of which would improve the accuracy of the existing analytical solution. By using software aimed at processing scientifi c data arrays, mathematical dependences of the required parameters on the initial constructive data were obtained. Formulas and initial data were obtained for calculating correction factors, which improve the accuracy of calculating local compressive and bending stresses. These formulas were combined with the already existing analytical dependencies in order to obtain a simple and easily applicable method for determining the actual local stresses from the application of an indirect concentrated load. As a result of scientifi c research, a new method for the analytical determination of local bending and compression stresses in riding beams was proposed on the basis of an analysis of the existing methodology and a series of numerical experiments.

Key words:
Monitoring system, forecasting, technical condition, metal structure, riding beam, local stresses

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