Cast Screws as Shear Anchors for Composite Slabs. (2017)

• Record Type: Journal Article
• Authors: Holomek, Josef; Bajer, Miroslav; Vild, Martin
• Is Part Of: Procedia engineering. Volume 195(2017)
• Page Start: 114
• Page End: 119
• Publication Date: 2017
• Subjects: Cast screw -- composite slab -- concrete -- embossments -- longitudinal shear -- shear anchor -- steel; Engineering -- Congresses; Engineering -- Periodicals; Engineering; Conference proceedings; Periodicals; 620.005
• DOI: 10.1016/j.proeng.2017.04.532
• Languages: English
• ISSNs: 1877-7058

Abstract

Abstract: Composite slabs consist of trapezoidal steel sheeting and concrete cover. The steel sheeting serves as both, a lost framework and a tension bearing member after hardening of concrete. The longitudinal shear between the sheeting and the concrete must be ensured by a mechanical interlock, for example shear studs or prepressed embossments in the sheeting. The traditional massive shear studs have to be welded to the supporting construction of the slab. Alternatively, thin screws can be drilled through the sheeting and cast into the concrete to ensure the composite action or to strengthen the composite slab in reconstructions locally. The usage of the screws is not limited to the steel supporting frames. This paper describes laboratory tests of the composite slabs with cast screws of various diameters and the effect of the screws on the bending capacity of the slab in combination with prepressed embossments.