The purpose of the study is to analyze previously developed structural solutions of the “slab-column” unit under various modes of static and cyclic loading using various reinforcing elements and types of concrete, to compare methods for calculating the slab for punching at the fillet places with columns according to Russian, Belarusian, and European standards. Calculations at different standards give different results, which differ significantly from each other. The main objective of the study was to develop a methodology for calculating flat reinforced concrete slabs for punching using a frame-rod model of work and models of destruction of reinforced concrete in a compressive power flow. The significance of the results obtained for the construction industry lies in the fact that the results of theoretical studies are applicable to create a methodology that allows calculating the fracture from overcoming the concrete resistance to tearing, shear and crushing when forcing flat reinforced concrete slabs at the fillet places with the columns. Flat slab contribute to the maximum use of floor height, provide an effective location below the slab of utilities.
The use of high-strength sandy concrete (HSSC) is an alternative to high-strength crushed stone. Its use is profitable for those regions of Russia in which crushed stone is an imported building material. Thus, crushed stone is supplied to the Republic of Tatarstan (RT) from the Ural, and the local reserves of sand are significant. Authors presented the results of studies to determine the economic efficiency of solid columns’ erection in one-story industrial buildings with bridge cranes according to the 1.424.1-5 series from HSSC of HSSC60 and HSSC80 classes in comparison with heavy concrete of B20...B80 classes. Studies have shown that in relation to Kazan, the use of HSSC of HSSC60 and HSSC80 classes in comparison with heavy concrete of B20...B40 classes, depending on the size of the span, column spacing, floor height and lifting capacity of cranes, can reduce steel consumption by 43.2…71.5 %. At the same time, the total cost of materials (steel and concrete) when using heavy concrete of B20...B40 classes is 1.7 %...38.1 % lower than with HSSC60 and HSSC80. This is due to the sharp rise in the cost of concrete in the Russian market in the third quarter of 2002 and continuing to the present (second quarter of 2021). When recalculated before the indicated price increase, the use of HSSC60 and HSSC80 in comparison with heavy concrete of B20…B40 classes gives a decrease in the total cost of materials by 1.9...34.5 %. The results obtained are novel because in the scientific and technical literature there is no information about the design of these columns from the HSSC.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.