Числові дослідження роботи залізобетонних арок на дію статичних короткочасних навантажень

The article describes the methodology for experimental studies of an arch made of high-strength rapid-hardening concrete, presents the results of the studies in tabular form, and describes the mechanical characteristics of the materials used in the manufacture of experimental arch specimens. The process of manufacturing experimental specimens from high-strength rapid-hardening concrete is briefly described. Drawings of the installation on which the stress-strain state of reinforced concrete double-hinged arches under the action of static single short-term loading was studied are also presented. Drawings of deformed and/or destroyed experimental specimens are demonstrated. Currently, there is a need for the fastest possible construction rates for various purposes, which can be achieved by introducing high-strength rapid-hardening concrete into the technological process, which allows you to significantly increase the construction rate and, accordingly, reduce the construction time of buildings and structures. The deformation patterns under short-term static loading of high-strength concrete have not been studied enough to date, which complicates the calculations of reinforced concrete structures made of such concretes. This article is devoted to solving these problems. There is a need to study the stress-strain state of reinforced concrete arches made of high-strength concrete under the action of static single and repeated loads of various levels and to in-depth determine the physical, mechanical and  deformation characteristics of high-strength concrete. This will allow for a more accurate assessment of the stress-strain state of elements of reinforced concrete structures made of such concretes, increase the reliability of design and obtain a significant economic effect in the construction of buildings and structures, which is an urgent task today.