Abstract
In keeping with current demands for sustainable development in all segments of the industry, numerous research in the field of steel-concrete composite structures has been focused on developing demountable shear connectors. In the past years, various demountable shear connectors have been suggested, with various mechanisms for transferring shear force between a steel profile and a concrete or composite slab. In this paper, a state of the art on the topic is given, and experimental and numerical research results of push-out and beam tests are summarized.
Highlights
The application of steel-concrete composite structures in the building industry has been increasing since the mid 20th century
Beam specimens with post-installed shear connectors showed up to 50 % increase in stiffness and strength compared to noncomposite beams, they were designed with the 30 % shear connection ratio only
Implementation of blind bolts was suggested in both demountable composite beams [25, 26] and in bridge rehabilitation work [21, 26], the only difference being in the mounting process: in the latter case, holes were cored in a concrete slab and drilled in a steel flange from the top side of the specimen, bolts were fixed and holes in the concrete slab were filled with grout
Summary
The application of steel-concrete composite structures in the building industry has been increasing since the mid 20th century The implementation of these structural systems presents quite a few advantages, including reduction in self-weight and increased speed of construction. Much research has been performed in the field of steel-concrete composite structures with the purpose of crossing larger spans, decreasing floor self-weight, and minimizing floor depth. Various systems, such as composite slim-floor beams, delta beams, and ultra-shallow floor systems, have been developed [1]. Numerous research has been conducted to further develop demountable steel-concrete composite structures, with an emphasis on shear connections between the steel flange and concrete deck applied in such systems. Kozma friction-grip bolts, bolts with a coupler system with injected resin [38]
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