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Article

Load-bearing capacity and deformability of steel-concrete floors on profiled steel decking

Vasyl Petriv
Abstract

This article aimed to provide a regulatory and analytical justification of the effect of the degree of shear interaction on compliance with the requirements of the first and second groups of limit states for composite floors with profiled decking. The research was carried out on the basis of a regulatory and analytical approach and was implemented with the application of the current Ukrainian normative documents and codified calculation models of steel-concrete floors as composite flexural members. In the calculation models adopted, either full or partial compatibility of the strains of steel and concrete elements’ deformations was adopted. The results showed that the load-bearing capacity and deformability of floors were interdependent properties formed within the framework of a unified stiffness-force mechanism of composite cross-section behaviour. It has been established that the degree of shear interaction between the steel deck and the concrete slab was an integrating parameter that simultaneously controlled the achieved design bending resistance and the effective stiffness of the floor system. With full shear interaction, the maximum realisation of the transformed geometrical and stiffness characteristics of the cross-section was achieved, which allowed fulfilling both groups of limit states simultaneously. In the case of partial composite action, a coordinated reduction in design resistance and an increase in deflections were observed, with deformability indicators showing greater sensitivity to reductions in effective stiffness than load-bearing capacity indicators. It was shown that, under identical service loads, deflections may reach permissible limit values earlier than limiting stresses were attained, thereby defining serviceability as the governing constraint in design decisions. The practical significance of the obtained results lies in the possibility of their application by design and expert organisations in the practice of regulatory assessment and design of steel-concrete floors with profiled decking

Keywords

composite action; shear interaction; serviceability; effective stiffness; deflections; limit states

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Received 03.10.2025, Revised 09.01.2026, Accepted 24.02.2026 Published 26.03.2026

Retrieved from Vol. 12, No. 1, 2026

Suggested citation

Petriv, V. (2026). Load-bearing capacity and deformability of steel-concrete floors on profiled steel decking. Architectural Studies, 12(1), 29-41. https://doi.org/10.56318/as/1.2026.29

https://doi.org/10.56318/as/1.2026.29

Pages 29-41

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ISSN 2411-801X e-ISSN 2786-7374  UDC 71;72
DOI: 10.56318/as