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Effect of Concrete Infill and Slenderness on Column-Face Component in Anchored Blind-Bolt Connections

Tizani, Walid; Mahmood, Mohammed; Bournas, Dionysios


Mohammed Mahmood

Dionysios Bournas


© 2020 American Society of Civil Engineers. 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.


Tizani, W., Mahmood, M., & Bournas, D. (2020). Effect of Concrete Infill and Slenderness on Column-Face Component in Anchored Blind-Bolt Connections. Journal of Structural Engineering, 146(4), 1-18.

Journal Article Type Article
Acceptance Date Aug 19, 2019
Online Publication Date Feb 6, 2020
Publication Date 2020-04
Deposit Date Sep 9, 2019
Publicly Available Date Sep 9, 2019
Journal Journal of Structural Engineering (United States)
Print ISSN 0733-9445
Electronic ISSN 1943-541X
Publisher American Society of Civil Engineers
Peer Reviewed Peer Reviewed
Volume 146
Issue 4
Article Number 04020041
Pages 1-18
Keywords Anchored bolted connection; column face bending; concrete strength; concrete filled tubular columns
Public URL
Publisher URL
Additional Information This material may be downloaded for personal use only. Any other use requires prior permission of the American Society of Civil Engineers. This material may be found at


Effect of concrete infill and slenderness on column face component in anchored blind-bolt connections (4.5 Mb)

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