Open AccessFEATURES OF CALCULATION OF CENTRIFUGED AND VIBRO-CENTRIFUGED REINFORCED CONCRETE STRUCTURES BY DIFFERENTIAL CONSTRUCTION CHARACTERISTICS OF CONCRETE
Author(s) -
Levon R. Mailyan,
С А Стельмах,
Evgenii M. Shcherban’,
Natal’ya Dotsenko
Publication year - 2021
Publication title -
vestnik bgtu im. v.g. šuhova
Language(s) - English
Resource type - Journals
ISSN - 2071-7318
DOI - 10.34031/2071-7318-2020-5-12-32-46
Subject(s) - rotation (mathematics) , differential (mechanical device) , deformation (meteorology) , structural engineering , elasticity (physics) , mechanics , inertia , centrifuge , centrifugal force , moment of inertia , centripetal force , rotational speed , geotechnical engineering , materials science , mathematics , geology , physics , engineering , classical mechanics , geometry , composite material , nuclear physics , thermodynamics
This article raises one of the most popular questions: evaluation of calculations of differential design parameters of centrifuged and vibro-centrifuged concrete. It is established that various layers of concrete of annular cross-section in the process of centrifugation and vibro-centrifugation are influenced by forces that differ from each other in the magnitude of the impact. This leads to completely different indicators of concrete layers in density, strength, deformability and modulus of elasticity. Centrifugal and centripetal forces are the main factors that are worth to pay attention to and to use in the calculated dependencies as arguments. Therefore, in general calculations, which take into account the change in the structural parameters of concrete, it is advisable to use the structural indicators or their increase as functions, and as independent variables – the forces of inertia of rotation, which, in turn, are the dependence of the distance from the center of rotation and the angular velocity of rotation. As a result, the calculated dependencies are derived for the differentiated accounting of changes in all the characteristics of concrete necessary for calculating, which gives grounds to enter into the calculation of structures the strength and deformation indicators of concrete that differ in cross section, and to use the existing reserves of the bearing capacity of elements.