UNIV. NEWS. NORTH-CAUCAS. REG. TECHNICAL SCIENCES SERIES. 2022; 3: 11-19
http://dx.doi.org/10.17213/1560-3644-2022-3-11-19
NUMERICAL SIMULATION OF THE STRESS-STRAIN STATE IN THE INTERFACE ZONE OF THE FLOOR SLAB AND THE COLUMN OF A MONOLITHIC REINFORCED CONCRETE FRAME
Skibin Gennady M. – Doctor of Technical Sciences, Professor, Head of the Department «Industrial, Civil Engineering, Geotechnics and Foundation Engineering», skibin@mail.ru
Gaydzhurov Peter P. – Doctor of Technical Sciences, Professor, Department «Technical mechanics», gpp-161@yandex.ru
Volodin Viktor A. – Graduate Student, Department «Technical Mechanics», vik25vol@bk.ru
Abstract
The main approaches to the finite element modeling of the interface zone of a ringless overlap with a column of a capeless joint are considered. The concept of fragmentation of a multi-span multi-storey reinforced concrete frame by separating two types of repeating structural fragments consisting of a part of the ceiling and a column has been developed and tested. An engineering technique is proposed for the step-by-step analysis of the stress-strain state in the studied area of the overlap and column interface, the essence of which consists in the initial calculation of the entire frame, followed by localization of the calculation scheme for a repeating fragment of the first floor of the frame. Initially, the calculation is performed using a finite element model generally accepted in computational practice; at the second stage, a refined model is applied that takes into account the volumetric nature of the stressed state at the junction of the overlap and the frame column. Numerical experiments using volumetric-rod and volumetric-plate models of a repeating structural fragment were carried out on a test example of a six-span three-storey frame made of reinforced concrete. Computational experiments were performed using the ANSYS Mechanical software package. Practical recommendations have been developed for the refined strength calculation of the floors of monolithic reinforced concrete frames of multi-storey buildings.
Keywords: finite element method, volumetric, beams, links, plane finite elements, frigless overlap with a non-capping joint, model of coupling of a floor slab and a column, models of discrete overlap reinforcement
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