Standard Pushout Tests and Design Rules for a Bolted–Welded Hybrid Demountable Shear Connector
Publication: Journal of Structural Engineering
Volume 148, Issue 8
Abstract
A bolted–welded hybrid demountable shear connector for use in deconstructable steel–concrete composite buildings and bridges was proposed. The hybrid connector consisted of a partially threaded stud, which was welded on the flange of a steel section, and a machined steel tube with compatible geometry, which was bolted on the stud. Four standard pushout tests according to Eurocode 4 were carried out to assess the shear performance of the hybrid connector. The experimental results show that the initial stiffness, shear resistance, and slip capacity of the proposed connector were higher than those of traditional welded studs. The hybrid connector was a ductile connector, according to Eurocode 4, with slip capacity higher than 6 mm. A nonlinear finite-element model was calibrated against the pushout tests and found capable of reproducing the experimental behavior with good agreement. The verified finite-element model was then used to conduct a series of parametric studies in order to assess the effect of infilled grout, concrete slab strength, stud diameter, stud tensile strength, tube thickness, and tube tensile strength on the shear resistance and stiffness of the hybrid connector. Based on the experimental and numerical results, a design equation is proposed for the prediction of the shear resistance of the novel connector.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors gratefully acknowledge the financial support provided by Horizon 2020—Marie Skłodowska-Curie Individual Fellowship of European Commission (REUSE: 793787), the National Natural Science Foundation of China (51978081), and the Natural Science Foundation of Hunan Province, China (2021JJ30712). The authors are grateful to the technicians at the Heavy Structures Lab at Heriot-Watt University, Edinburgh, UK. Any opinions, findings, and conclusions expressed in this article are those of the authors and do not reflect the views of the sponsors and supporters.
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Published In
Journal of Structural Engineering
Volume 148 • Issue 8 • August 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Dec 1, 2021
Accepted: Mar 22, 2022
Published online: May 31, 2022
Published in print: Aug 1, 2022
Discussion open until: Oct 31, 2022
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