Abstract
To ease the installation of perforating rebars through multi-holes, an alternative notched perfobond shear connector was proposed by cutting out the hole edge. This paper presents the test results of six pull-out specimens with conventional and notched perfobond shear connectors. The objective was to compare the failure modes and pull-out behaviors of perfobond shear connectors using circular holes and notched holes. Furthermore, the explicit finite element method was introduced and validated to generate parametric results for pull-out tests of notched perfobond shear connectors. A total of 33 parametric simulations were performed to further study the influences of several variables, including the hole diameter, the cut width, the perfobond thickness, the concrete strength, the diameter and strength of the rebar, and the strength of the structural steel. The experimental and numerical results were used to evaluate the previous equations for perfobond shear connectors. Finally, an alternative equation was proposed to estimate the pull-out resistance of notched perfobond shear connectors.
Highlights
In recent decades, steel and concrete composite structures have been increasingly used in bridge engineering due to their great structural performance and favorable construction cost
The pull-out failure modes of conventional and notched perfobond shear connectors were characterized by cracks in the concrete slab, shear of the concrete dowel, and deformation of the characterized by cracks in the concrete slab, shear of the concrete dowel, and deformation of the perforating rebar
The concrete dowels in the hole failed in shear
Summary
Steel and concrete composite structures have been increasingly used in bridge engineering due to their great structural performance and favorable construction cost. Extensive research has been performed to study the shear behavior of the conventional perfobond shear connectors [13,14,15,16,17]. Behaviors a total of six pull-out testsand werenotched performed to compare failure modes and the the load–separation of conventional perfobond shearthe connectors. Thenonlinear effects of finite several parameters, including the perfobond hole diameter, theconnectors cut width,were the perfobond thickness, element models of notched shear built to further study thethe concrete rebar diameter, the the rebar strength, and the strength. The parametric effects strength, of severalthe parameters, including hole diameter, the cutsteel width, the perfobond thickness, results were generated the pull-out behavior of perfobond shear connectors. Analyticalinmodel was proposed to predict the pull-out resistance of notched perfobond shear connectors in steel and concrete composite structures
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