A Novel Shear Strength Prediction Approach for Headed Shear Studs Embedded in Ultrahigh-Performance Concrete
Publication: Journal of Structural Engineering
Volume 147, Issue 11
Abstract
Due to the excellent mechanical properties of ultrahigh-performance concrete (UHPC), the shear strength of stud–UHPC composite connections is significantly enhanced. Nevertheless, the underlying mechanism remains not fully understood. This study discusses the process of failure of shear studs embedded in UHPC and develops a concrete wedge block model in an attempt to explain such improvement. The procedure to determine the key characteristics of the wedge block is established. Based on the wedge block model, a modified compression-dispersion model and plastic deformation theory were utilized to derive a shear strength prediction formula for stud–UHPC composite connections. Push-out test results combined with relevant data collected from available literature were used to validate the proposed formula. The deviation of predicted shear strength from experimental results was typically within 25%. The contribution from the UHPC wedge block to the shear strength of the stud–UHPC composite connection was found to be approximately 13%.
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Data Availability Statement
Some or all data, models, or code generated or used in this study are available from the corresponding author by request.
Acknowledgments
This study was supported by the Fundamental Research Funds for the Central Universities (Project No. 2242021R10078), National Natural Science Foundation of China (Contract Nos. U1934205 and 51678140), and National Key R&D Plan (Contract No. 2017YFC0703402). Their financial support is greatly appreciated. The authors are grateful for Mr. Richard Way for editing and proofreading.
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Received: Apr 7, 2020
Accepted: May 4, 2021
Published online: Aug 28, 2021
Published in print: Nov 1, 2021
Discussion open until: Jan 28, 2022
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