Structural Mechanics of Engineering Constructions and BuildingsStructural Mechanics of Engineering Constructions and Buildings1815-52352587-8700Peoples’ Friendship University of Russia (RUDN University)2256910.22363/1815-5235-2019-15-6-433-437Research ArticleNumerical studies of strength of concrete cylinders for compressionMkrtychevOleg V.<p>Doctor of Technical Sciences, Professor of the Strength of Materials Department</p>misha-andreev_93@mail.ruAndreevMikhail I.<p>post-graduate student of the Strength of Materials Department</p>misha-andreev_93@mail.ruMoscow State University of Civil Engineering (National Research University)1512201915643343729122019Copyright © 2019, Mkrtychev O.V., Andreev M.I.2019<p>Relevance. The choice of adequate models of materials and deformation diagrams is of great importance when performing structural calculations in a nonlinear setting. Since there are no instructions on how to use the deformation diagrams of concrete and reinforcement when working together, given in SP 63.13330.2018, it is necessary to introduce assumptions for modeling reinforced concrete structures with finite elements of the same type. The aims of the work are to conduct numerical experiments on testing concrete cylinders for uniaxial compression and to verify the results with normative data. Methods. Numerical experiments were performed in the LS-DYNA software package. This program complex allows to simulate the joint work of concrete and reinforcement with the help of volume (for concrete) and rod (for reinforcement) finite elements. A cylinder with a diameter of 150 mm and a height of 300 mm was taken as model. Samples were modeled by volumetric finite elements. The CSCM - Continuous Surface Cap Model is a nonlinear material used to model concrete. Tests were carried out with samples of the following classes of concrete for cylindrical compressive strength: C12, C16, C20, C25, C30, C35, C40, C45, C50, C55. This corresponds to the following classes of cubic compressive strength: B15, B20, B25, B30, B37, B45, B50, B55, B60, B67. Results. The conducted researches have shown that the character of destruction of samples at numerical experiment corresponds to the character of destruction at tests. The investigated concrete model CSCM can be used in the calculation of concrete and reinforced concrete structures for the main classes of concrete, when taking into account the transition from cubic to prismatic strength and additional correction factors to cylindrical strength.</p>verificationconcrete modelnumerical experimentnonlinear materialconcrete cylinderuniaxial compressionvolumetric finite elementscylindrical strengthверификациямодель бетоначисленный экспериментнелинейный материалбетонный цилиндродноосное сжатиеобъемные конечные элементыцилиндрическая прочность[SP 63.13330.2018. (2018). Betonnye i zhelezobetonnye konstrukcii. Osnovnye polozheniya [Concrete and Reinforced Concrete Structures. General provisions]. SNIP 52-101-2003. Moscow. (In Russ.)][GOST 10180-2012. (2012). Betony. Metody opredeleniya prochnosti po kontrol'nym obrazcam [State Standard 10180-2012. Concrete. Methods for determining the strength of control samples]. Moscow. (In Russ.)][US Department of Transportation. Federal Highway Administration. (2007). Evaluation of LS-DYNA Concrete. Material Model 159. FHWA-HRT-05-063, 190.][Murray Y.D. (2007). Users Manual for LS-DYNA Concrete Material Model 159, FHWA-HRT-05-062.][EN 1992-1-1 Eurocode 2 (2004). Design of concrete structures. Part 1–1: General rules and rules for buildings.][Telford T. (2005). Designers’ guides to the Eurocodes. Designers’ guides to Eurocode 2: Design of concrete structures designers’ guide to EN1992-1-1 and EN1992-1-2 Eurocode 2: Design of concrete structures general rules and rules for buildings and structural fire design.][Telford T. (1993). Comite Euro-International du Beton CEB-FIP Model Code 1990. Design code.][Mkrtychev O.V., Sidorov D.S., Bulushev S.V. (2017). Comparative analysis of results from experimental and numerical studies on concrete strength. MATEC Web of Conferences, 117, 00123.][Mkrtychev O.V., Andreev M.I. (2018). Verification of the reinforced concrete beam model based on the results of a full-scale experimental study. MATEC Web of Conferences, 196, 01029.][Andreev M.I., Bulushev S.V., Dudareva M.S. (2018). Verification of the eccentrically compressed reinforced concrete column calculation model based on the results of a fullscale experimental study. MATEC Web of Conference, 251, 04013.][Hua Jiang, Jidong Zhao. (2015). Calibration of the continuous surface cap model for concrete. Finite Elements in Analysis and Design, 97, 1–19.][Salamon J., Harris D.W. (2014). Evaluation of Nonlinear Material Models in Concrete Dam Finite Element Analysis (p. 89). Report DSO-2014-08. Colorado.]