2018, Vol. 5, No. 2. - go to content...

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DOI: 10.15862/12SATS218 (https://doi.org/10.15862/12SATS218)

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Podlesnykh I.S., Gridnev S.Yu., Barchenkova N.A. Analysis of influence of solar radiation on the deflected mode of steel-reinforced concrete span. Russian Journal of Transport Engineering. 2018; 5(2). Available at: https://t-s.today/PDF/12SATS218.pdf (in Russian). DOI: 10.15862/12SATS218

Analysis of influence of solar radiation on the deflected mode of steel-reinforced concrete span

Podlesnykh Igor Sergeevich
Voronezh state technical university, Voronezh, Russia
E-mail: 94igor@mail.ru

Gridnev Sergey Yuryevich
Voronezh state technical university, Voronezh, Russia
E-mail: gridnev_s_y@rambler.ru

Barchenkova Nadezhda Aleksandrovna
Voronezh state technical university, Voronezh, Russia
E-mail: nadia.7194@yandex.ru

Abstract. Spans structures of road bridges are subject to the long-lived temperature and climatic influences, in particular from influence of solar radiation. Because this area has not received much development yet, more research is needed in this direction. In the article the analysis of deflected mode of a steel-reinforced concrete span at solar radiation taking into account temperature distribution on road base and on height of the main beams was made. Several cases of influence of solar radiation at various position of the sun and temperature distribution were considered, the characteristic for summer season on the territory of the Voronezh region. The authors developed a finite element model of a span structure which takes into account the joint work of layers of road base and a reinforced concrete slab, pliability of the main beams and also uneven heating of elements of a bridge construction. The character of temperature distribution along the height of layers of road base and a reinforced concrete slab was studied depending on reference temperature on the surface of the structure that allowed to specify the size of stresses caused by influence of a solar radiation. The calculation was made for a combined effect of constant, temperature and temporary automobile load. The need to take into account solar radiation in the calculation of span structures was shown. The influence of temperature impacts on safety of an asphalt concrete was studied. Numerical researches show that in the upper layer of road base there are tensile stresses of ultimate strength from influence of a solar radiation and temporary loading. It can be one of the main reasons for emergence of longitudinal fractures.

Keywords: steel-reinforced concrete span; solar radiation; road base; main beams; temperature distribution; uneven heating; deflected mode

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