Effect of Concrete Infill and Slenderness on Column-Face Component in Anchored Blind-Bolt Connections
Publication: Journal of Structural Engineering
Volume 146, Issue 4
Abstract
Previous research on blind-bolted connections to hollow columns have provided a wealth of experimental data but little information on parametric analytical models to guide their design. One of the connection components that requires further understanding is the column-face bending. This paper presents the results and evaluation of experimental tests and finite element analyses for the bending behavior of the column-face component. Tests were conducted on full-scale connections to investigate the effect of concrete type and strength on the component. The results demonstrated that concrete strength has a direct influence on component strength and stiffness. The increase in concrete strength correlated with a significant increase in component strength. The increase in component stiffness was less significant, and is found to be limited by the column slenderness ratio (width/thickness). Slenderness ratio limits were defined beyond which the increase in concrete strength has no effect on component stiffness. A formula for evaluating the confinement effect on the concrete infill is proposed. The strength and stiffness of the component were not affected when using self-compacting concrete, but the use of lightweight concrete reduced both strength and stiffness. The failure mode of the component is bolt anchorage failure followed by a complete yielding of the column face plate around the bolts.
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Acknowledgments
The authors acknowledge TATA Steel and Lindapter International for supporting this research.
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Journal of Structural Engineering
Volume 146 • Issue 4 • April 2020
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©2020 American Society of Civil Engineers.
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Received: Aug 6, 2018
Accepted: Aug 19, 2019
Published online: Feb 6, 2020
Published in print: Apr 1, 2020
Discussion open until: Jul 6, 2020
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