Techno Press

Steel and Composite Structures   Volume 29, Number 2, October25 2018, pages 257-272
Static behaviour of bolted shear connectors with mechanical coupler embedded in concrete
Branko Milosavljević, Ivan Milićević, Marko Pavlović and Milan Spremić

Abstract     [Full Text]
    The research of shear connectors composed from mechanical couplers with rebar anchors, embedded in concrete, and steel bolts, as a mean of shear transfer in composite connections is presented in the paper. Specific issues related to this type of connections are local concrete pressure in the connector vicinity as well as the shear flow along the connector axis. The experimental research included 18 specimens, arranged in 5 series. Nonlinear numerical analyses using Abaqus software was conducted on corresponding FE models. Different failure modes were analysed, with emphasis on concrete edge failure and bolt shear failure. The influence of key parameters on the behaviour of shear connector was examined: (1) concrete compression strength, (2) bolt tensile strength and diameter and (3) concrete edge distance. It is concluded that bolted shear connectors with mechanical couplers have sufficient capacity to be used as shear connectors in composite structures and that their behaviour is similar to the behaviour of post installed anchors as well as other types of connectors anchored without the head.
Key Words
    steel-concrete composite structures; shear connectors; mechanical couplers; push-out tests, concrete edge breakout, finite element analysis
(1) Branko Milosavljević, Ivan Milićević, Milan Spremić:
Faculty of Civil Enginering, Univercity of Belgrade, Bulevar kralja Aleksandra 73, 11000 Belgrade, Serbia;
(2) Marko Pavlović:
Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, Delft, CD, Netherlands.

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