Abstract
The results of an analytical study examining the behavior and load transfer mechanism of 16 interior flat slab-column joint models, transferring lateral load, are presented. Predictions of the connection response were calculated using a professional finite element computer program, utilizing three-dimensional, elasto-plastic, concrete elements. Currently, various analytical methods are suggested for calculating the load transfer. The assume that the slab sections carry the external unbalanced moment by developing a bending moment on the front and back faces, and a torsional moment on the side faces. Several studies have tried to determine the relative contribution of the bending and torsional moments. Slots or cutting through the slab, made along the respective column faces, were introduced in an attempt to isolate the components that resist the external moment. According to the present analysis, the various types of connections have a minor effect on the response. They display very similar deformations and stress distributions in the slab, except for very local stress concentrations, almost ignoring the slots and cuttings. As a result of this analysis, the attempts to isolate appear to be unsuitable since the slab's bending and torsional mechanisms are highly coupled.
Published Version
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