Effect of Lap Length on Shear Failure in Steel-Concrete Composite Connections Using Epoxy Adhesives
1 Department of Civil and Environmental Engineering, College of Engineering, University of New Haven, West Haven, CT, USA.
2 Department of Civil Engineering, Faculty of Engineering and Natural Sciences, Ankara Yildirim Beyazit University, Ankara, Turkey.
Research Article
World Journal of Advanced Research and Reviews, 2024, 24(03), 3583-3594
Publication history:
Received on 02 November 2024; revised on 21 December 2024; accepted on 28 December 2024
Abstract:
This study investigates whether structural adhesives can provide reliable shear transfer in steel-concrete composite connections, focusing on how lap length affects interface capacity. A push-out test program evaluated three bonded specimens with lap lengths of 100 mm, 150 mm, and 200 mm using a two-part epoxy. Each specimen combined an IPE steel section with a plain concrete block and a 5 mm adhesive layer. Results showed sudden, brittle failure governed by the concrete close to the bonded interface for all cases. The 150 mm lap length achieved the highest measured shear stress, suggesting that bond geometry influences capacity beyond bonded area alone. The findings support prior evidence that capacity tends to saturate beyond an effective bond length and that width to length proportion can shift stress concentrations. Practical implications include selecting lap lengths that balance constructability with reduced stress peaks, improved reliability, and minimized surface preparation demands. Limitations include single tests per configuration and potential setup variability, so future work should include replication and parametric studies of width to length ratio, surface treatment, and adhesive type.
Keywords:
Epoxy Adhesive; Lap Length; Push-Out Test; Steel-Concrete Composite; Shear Failure; Bond Geometry
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Copyright © 2024 Author(s) retain the copyright of this article. This article is published under the terms of the Creative Commons Attribution Liscense 4.0