Experimental evaluation of the effect of the loading rate on the deformation and strength characteristics of concrete of class B45 under central compression
Abstract
Experimental evaluation of the effect of the loading rate on the deformation and strength characteristics of concrete of class B45 under central compression
Incoming article date: 02.08.2025The article presents the results of an experimental study of the effect of loading speed on the deformation and strength characteristics of concrete of class B45 under central compression. 15 prisms measuring 100×100×400 mm, divided into three series according to the loading speed, were tested. Regression dependences are constructed, correlation coefficients (up to 0.9975) and determination coefficients (up to 0.9950) are determined, confirming the high degree of consistency of the models with experimental data. It is established that an increase in the loading rate contributes to an increase in strength and a decrease in the magnitude of the marginal relative deformation of concrete. The obtained dependences can be used as an experimental basis for constructing a nonlinear deformation method for calculating bent and non-centrally compressed reinforced concrete structures made of concrete of the class under consideration (B45), subject to static and high-speed impacts.
Keywords: experiment, concrete samples, high-speed loading, central compression, statistical processing of results, least squares method, regression curve