Abstract
Abstract The aim of this work is to evaluate the behavior and strength of composite slabs considering the influence of the friction at the sheeting-concrete interface in the region of the support. Results from tests conducted in the Structural Engineering Department of Federal University of Minas Gerais (UFMG) were used. A Steel Deck 60 system was considered, which consists of a trapezoidal profile with “V” shaped embossments. Deflections, end slips and strains of the steel decks were measured, allowing for the analysis of the behavior of the composite slab system and for the determination of its failure mode. The influence of friction of the region of support in the longitudinal shear resistance was evaluated through the partial shear connection method, which also allowed for establishing criteria and determination of analytical expressions for calculating the ultimate load. Comparative analyses reveal that the influence of the friction of the region of support in the shear-bond resistance is more significant in composite slabs with short shear spans. Design expressions which incorporate friction will also be presented. Their application have demonstrated the efficiency of the method for evaluating the longitudinal shear resistance.
Highlights
The use of a system of composite slabs of concrete and steel in metal construction began in the 1930s, according to Veljkovic’[1]
Tests were conducted at the Structural Engineering Laboratory of Federal University of Minas Gerais (UFMG) on 12 specimens of composite slabs varying shear spans and thickness of decking with embossments in a “V” shape
Deflections, end slips and steel strains were measured, allowing the analysis of the behavior of the composite slab system and the determination of its failure mode by shear bond. These analyses were evaluated through the Partial Shear Connection (PSC) method, taking into account the influence of the friction of the region of support in the longitudinal shear resistance, according to EUROCODE 4 [4]
Summary
The use of a system of composite slabs of concrete and steel in metal construction began in the 1930s, according to Veljkovic’[1]. In these systems, the slabs have steel sheeting with very thin thickness, usually between 0.80 mm and 1.25 mm, embedded in the system that work as permanent steel sheeting, supporting the concrete before curing and construction loads. The main objective of this study is to analyze, after curing the concrete, the influence of friction of the region of support in the longitudinal shear resistance of the composite slab system Deck- 60, using the partial shear connection method
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