Testing of demountable shear connectors

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2022-7-27
Karakuş, Berk
In composite beams, the concrete deck cannot be easily demounted from the steel I-section if welded headed stud connectors are used. A new demountable shear connector was developed as a part of this thesis to promote sustainable composite construction. The connector is composed of two angle sections and a high-strength bolt. The proposed system has been studied through a three-phase experimental program. In the first phase, 33 push-out experiments were conducted to determine the shear load-carrying capacity. The size of the angle section, bolt diameter, bolt grade, concrete strength, loading direction, and bolt thread conditions were considered as the parameters. The results showed that the proposed connector system provides shear capacities that range between 150 kN and 330 kN and shows ductile behavior. In the second phase, six pull-out experiments were conducted to determine the tensile load-carrying capacity. The size of the angle sections and total height were considered as the parameters. The experimental results showed that the proposed connector provides tensile capacities that range between 50 kN and 90 kN. In the third phase of the study, four full-scale beam specimens with varying degrees of composite action were tested to demonstrate the applicability of the proposed connectors. The bending resistance provided by the beams was similar to the ones calculated using the conventional rigid plastic analysis of stress blocks. The concrete decks were easily demounted after the beam tests demonstrating the applicability of the proposed system for practical applications.

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Citation Formats
B. Karakuş, “Testing of demountable shear connectors,” M.S. - Master of Science, Middle East Technical University, 2022.