2019, Vol. 6, No. 2. - go to content...

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DOI: 10.15862/12SATS219 (https://doi.org/10.15862/12SATS219)

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Safronov V.S., Antipov A.V. Vibrations of continuous slab reinforced concrete bridge when driving a three-axle car. Russian Journal of Transport Engineering. 2019; 6(2). Available at: https://t-s.today/PDF/12SATS219.pdf (in Russian). DOI: 10.15862/12SATS219

Vibrations of continuous slab reinforced concrete bridge when driving a three-axle car

Safronov Vladimir Sergeevith
Voronezh state technical university, Voronezh, Russia
E-mail: vss22@mail.ru

Antipov Andrei Vladimirovith
OOO «Dortransproekt», Voronezh, Russia
E-mail: dron_a77@mail.ru

Abstract. Problem statement. The technique and its approbation on the reconstructed transport construction of full-scale dynamic tests of the continuous slab span of the road bridge using a refined algorithm of dynamic calculation of the mobile inert load are presented.

Results. The modern methods and algorithms of calculation of transport facilities for mobile road load, which can be used in the design and full-scale dynamic tests of road bridges, are analyzed. Affected by many factors, including design features bearing system of the bridge and the moving crew, the presence of unevenness on the carriageway etc., which need to be considered in the evaluation of the dynamic characteristics of transport facilities.

Describes the methodology and processing of data from the field dynamic testing of a road bridge, which studied dynamic response of a slab of reinforced concrete spans for the passage of a three-axle truck through the artificial a single bump. The spectral analysis of the registered vibration patterns is performed, the results of which are compared with the eigen frequency spectrum of the superstructure.

The calculated analysis of the situation of the vehicle passage on the roadway of the bridge with the allocation of quasi-static and dynamic components of the oscillations is carried out. The latter is used for the lower self-forms a bridge, which defines the dynamic quality transport facilities.

Conclusion. The performed approbation of the proposed technique can be effectively used both in the dynamic tests of constructed or operated bridges, and in the design of new transport facilities.

Keywords: road bridge; slab reinforced concrete superstructure; full-scale dynamic tests; modeling; measurements; vibration deflection; spectral analysis; algorithm of computational modeling; quasi-static and dynamic components of vibrations

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