08.49: Comparison of headed studs with perfobond shear connectors - experimental and numerical analysis

Abstract

Different types of shear connectors which assure composite action between steel profile and concrete slabs have been developed during decades, considering different shapes, installation equipment and installation process. Also, three main characteristics of shear connectors, shear resistance, stiffness and ductility are specific for each type of shear connector. Widely used shear connectors for composite constructions of buildings and bridges are headed studs and different types of perfobond shear connectors. Different behaviour of these types of shear connectors, mainly reflected in unsatisfactory behaviour of headed studs resulted from fatigue problems, reflects in their various applications. Numerous experimental and numerical investigations performed with headed studs and perfobond shear connectors through standard push-out tests resulted in development of design procedures which are proposed by different authors or can be found in current design codes such as EN 1994-1-1, ANSI/AISC-360-05 and JSCE. Comparison of heads stud’s and perfobond shear connector’s beahviour through experimental results of standard push-out tests are presented in this paper. Experimentally obtained shear resistance of four headed studs with 16 mm diameter and 100 mm height, positioned in one row into envisaged openings of prefabricated composite decks, with shear resistance of perfobond shear connectors are compared. Main differences in respect of ductility, stiffness and different failure modes which can be noticed for these types of shear connections, obtained from experimental investigation are analyzed in this paper. Comparative analysis includes different shapes, dimensions and specimen’s layout of perfobond shear connectors, experimentally investigated through standard push-out tests which results are available in different literature. Numerical analysis included perfobond shear connectors positioned into envisaged openings of prefabricated composite decks with same dimensions and material properties which are used for numerical analysis of considered headed studs shear connection and which are obtained from experimental investigation. Shear resistance obtained from numerical analysis of perfobond shear connectors are compared with design procedures developed from different authors.