Abstract
Carried out a comparative analysis especially the exposure to solar radiation on the stress-strain state (SSS) of span structures with orthotropic slabs of reinforced concrete. Determine the character limit of the temperature distribution in the elements of the two types of spans according to the results of field measurements. Conducted calculation of Stress-Strain State on specific cases of solar radiation with the use of the developed finite element (FE) models of two types of span structures in the platform LIRA SAPR. The results of SSS features obtained for a steel-reinforced concrete superstructure and a metal superstructure with an orthotropic slab are compared. It is shown that the uneven daytime change in the temperature field under the influence of solar radiation has a significantly different nature of effect on the stress-strain state of elements of metal and steel-reinforced concrete span structures.
Highlights
In the practice of bridge construction, various types of road bridges are used
In studies [1012], the nature of the distribution of the temperature field along the height of the crosssection was studied, the influence of solar radiation on the stress-strain state and the safety of the asphalt concrete pavement was noted.The article [13] defines the temperature limits at which there are discrepancies in the results of calculating the SSS based on field measurements of the span under the influence of solar radiation with the results of calculations, in accordance with the recommendations of regulatory documents
Analysis of the results of field measurements showed that when exposed to solar radiation, the surfaces of the elements in the steel-reinforced concrete span structure heated up more than in the metal span structure with an orthotropic slab
Summary
One of the most common are steel-reinforced concrete and metal spans with an orthotropic slab Such spans, which are internally statically indeterminate many times over, perceive temperature effects in a complex way, especially when their elements are unevenly heated. The authors of the article carried out a number of works devoted to the construction of the technique and, with its help, the study of the temperature effect on spans with reinforced concrete and orthotropic slabs.The article [8] examines the stress-strain state of the steelreinforced concrete span structure together with the clothing of the driving track for the purpose of preservation and durability of the top layer of asphalt concrete. Articles [19,20,21] are devoted to the analysis of the design features of road pavements on spans, the main provisions for the design of pavement structures on orthotropic and reinforced concrete slabs are described
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