Numerical modelling of concrete hollow-core slabs on steel beams
https://doi.org/10.22227/1997-0935.2025.7.1072-1082
Abstract
Introduction. In modern multi-story buildings constructed from various materials, steel frames are increasingly used, which provide flexibility in planning solutions and reduce construction time. Various types of floors, such as reinforced concrete slabs and precast hollow-core slabs, allow faster installation and increase structural strength, and ensure the transfer of horizontal loads. For optimal design of floors made of precast slabs, especially those supported by the bottom flange of steel beams, it is necessary to use numerical modelling using the finite element method to accurately account for the specific features of the structure and improve its efficiency.
Materials and methods. When forming the finite element model, rod elements for columns and beams, as well as finite shell elements for floor slabs, were used, which allows for accurate modelling of their rigidity and behavior under loads. Several approaches were considered to take into account the specific features of precast concrete slabs: the use of rigid rods and contour triangulation, as well as the creation of hinges with joint expansion to model connections and joint operation of elements. The calculations used numerical parameters of rigidity and fixation, and also took into account the features of support and eccentricities, which increases the accuracy of modelling and allows for the evaluation of forces and deflections in the structure.
Results. The maximum vertical displacements of beams for both considered variants of numerical modelling are determined. Bending moments in beams are obtained and a comparison of the obtained values for numerical and theoretical calculations is performed.
Conclusions. Numerical analysis has shown that modelling precast concrete slabs using contour triangulation (without using rigid rods) more accurately reflects the nature of the operation of the floor structure. The forces in the beams obtained with this modelling method are greater than when using rigid rods in the model.
About the Author
M. P. Berger
Moscow State University of Civil Engineering (National Research University) (MGSU)
Russian Federation
Russian Federation
Maria P. Berger — Candidate of Technical Sciences, Associate Professor of the Department of Metal and Wooden Structures
26 Yaroslavskoe shosse, Moscow, 129337
RSCI AuthorID: 927136, Scopus: 57192100982, ResearcherID: AAG-2520-2022
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Review
For citations:
Berger M.P. Numerical modelling of concrete hollow-core slabs on steel beams. Vestnik MGSU. 2025;20(7). (In Russ.) https://doi.org/10.22227/1997-0935.2025.7.1072-1082
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