Abstract
Development of competent composite beam systems has been fostered by the steel industry for structural efficiency. Current flexural design methods were developed primarily for conventional composite systems using a wide-flange section. Posed configuration is characterized by angle shear connectors welded to U-shaped cold-formed steel beams. For verification of code compliance, this study performed 12 composite beam flexural tests. Test parameters considered angle shear connector direction, spacing, and concrete strength. Based on experimental and analytical results, flexural strength prediction by international standards as well as an angle anchor design equation were evaluated. Ensuing thoughts and discussion pertain to the effects of neutral axis depth and partial composite behavior. Findings were deemed beneficial in development of design methods for the posed system. To develop design methods for the posed system, a simplified flexural response analysis model, which relies on just shear connector strength without an exact interfacial shear-slip relationship information, is proposed.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The research described in this paper was financially supported by POSCO and National Research Foundation of Korea (NRF) (No. 2021R1A5A1032433). Testing was done at the POSCO laboratory. The assistance of Dr. Jin-Won Kim of POSCO and Mr. Hee-Hoon Kim of dongil rubber belt (DRB) is greatly appreciated. The first and third authors contributed primarily to the publication of AC495 and ICC-ES [ESR-4134, U-shaped steel-concrete composite beam (BESTOBEAM system)]. The views expressed herein are those of the authors, and do not necessarily represent those of the sponsor.
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Published In
Journal of Structural Engineering
Volume 149 • Issue 12 • December 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Feb 7, 2023
Accepted: Jul 21, 2023
Published online: Oct 5, 2023
Published in print: Dec 1, 2023
Discussion open until: Mar 5, 2024
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