2018, Vol. 5, No. 4. - go to content...

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DOI: 10.15862/12SATS418 (https://doi.org/10.15862/12SATS418)

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Baranov T.M., Tolstikov E.O. The actual operation assessment of the railway bridge superstructure using a mobile monitoring system. Russian Journal of Transport Engineering. 2018; 5(4). Available at: https://t-s.today/PDF/12SATS418.pdf (in Russian). DOI: 10.15862/12SATS418

The actual operation assessment of the railway bridge superstructure using a mobile monitoring system

Baranov Timofey Mikhaylovich
Irkutsk state transport university, Irkutsk, Russia
E-mail: baranov-87@yandex.ru

Tolstikov Evgeniy Olegovich
Irkutsk state transport university, Irkutsk, Russia
E-mail: E.O.Tolstikov@yandex.ru

Abstract. Deviations in the operation of the operated bridge structures on the railway are detected when damage occurs. At the same time, early detection and prognosis of damage progress can be obtained using monitoring systems. The article presents the methods and technologies for the use of mobile monitoring systems for assessing the actual operation of the metal superstructure of the railway bridge with the main driving trusses. The hardware of the measuring complex is considered, the main measuring instrument is the glued electrical strain gauges. The monitoring system kept a continuous record of sensor readings for 28 days. To process the data received by the monitoring system, specialized software has been developed that systematizes the incoming information. Analysis of the actual supertructure operation is carried out by finding the relationship of stresses in the various elements of the superstructure, arising under the same load. This approach allowed us to exclude the factor of unknown intensity of the temporary load. The results of monitoring the work of the superstructure are given. In total, over 680 train passage records were analyzed, which allowed for a statistical description of the data. The theoretical values of the relationship of stresses in the elements of the superstructure are determined using the apparatus of the influence lines obtained by a numerical method. The conclusions are made about the distribution of deformations of the superstructure under temporary load and about the degree of compliance with theoretical calculations. The construction factors and the values of their statistical scatter are determined, the actual dynamic factors are statistically calculated. The construction factors calculated from the stress ratios lie in the range of 0.8-1.116. Dynamic factors are within 1.13 and do not exceed the rated values.

Keywords: monitoring systems; automated information processing; bridge testing; strain gauges; railway bridges; steel superstructures; construction factors; dynamic factors; numerical simulation of superstructures

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