Group Behavior of Double-Headed Anchored Blind Bolts within Concrete-Filled Circular Hollow Sections under Cyclic Loading
Publication: Journal of Structural Engineering
Volume 143, Issue 10
Abstract
Seven full-scale curved T-stubs connected to concrete-filled circular hollow sections (CFCHSs) using groups of double-headed anchored blind bolts (DHABBs) have been cyclically tested in this paper considering different configurations of the DHABBs and the addition of a through bolt (TB) and shear blind bolts (SBs). The cyclic testing consisted of axial forces being applied to the T-stub stem and transmitted to the column through the bolted T-stub flange connection. The relative contributions of the embedded heads, TB, SBs, and heads bearing on the tube wall to the total applied force obtained from finite-element analysis (FEA) for each specimen considered in the experiments have been summarized. Furthermore, a parametric study has been performed using FEA software to make an assessment of which parameters are the most influential in achieving a higher secant stiffness at 0.6 provided that the bolts are fully pretensioned, sufficient concrete strength is provided, and the embedded heads have sufficient embedment depths. The results show that the thickness of the T-stub flange is the parameter that is most influential in increasing the secant stiffness of the connection, and it is recommended that a flange thickness of be used. The second most important parameters are the addition of a TB and SBs because these are effective in preventing premature stiffness degradation resulting from concrete cracking.
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Acknowledgments
This research was supported and funded by the Australian Research Council (ARC) and collaborating organizations, such as Orrcon Steel and AJAX Engineered Fasteners, through Linkage Grant LP110200511. The authors would like to acknowledge all of the support and contributions provided by these partners. The authors also would like to thank the Australian Government Research Training Program Scholarships for the full scholarship provided to Mr. Oktavianus, and the technicians, Mr. Michael Culton and Mr. Sanjeet Chandra, for their assistance during the experimental work.
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Published In
Journal of Structural Engineering
Volume 143 • Issue 10 • October 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Jan 3, 2017
Accepted: May 8, 2017
Published online: Aug 1, 2017
Published in print: Oct 1, 2017
Discussion open until: Jan 1, 2018
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