Quasi-Static Cyclic Testing of a Large-Scale Hybrid Sliding-Rocking Segmental Column with Slip-Dominant Joints
Publication: Journal of Bridge Engineering
Volume 19, Issue 10
Abstract
This paper presents the findings of an experimental study that investigated the response properties of segmental cantilever columns incorporating internal unbonded posttensioning (PT) and slip-dominant (SD) joints. The SD joints exhibited controlled sliding that provided energy dissipation with low damage. All joints of these columns, except for the bottom one, were designed to be SD. The bottom joint was designed to be rocking dominant (RD) and exhibited rocking that offered self-centering to the system. Design objectives and equations are presented. These equations were used for the design of a large-scale cantilever column that was subjected to reverse lateral cyclic loading at its top end, reaching a maximum drift ratio of 14.9%. At small drift ratios (), the response was dominated by sliding of the SD joints that provided energy dissipation (damping). For medium drift ratios (between 3 and 10%), rocking at the bottom joint increased and provided self-centering properties to the system. For large drift ratios (), the self-centering properties decreased, but the damping properties remained practically constant. Rocking at the SD joints remained small at all times. Minor spalling was observed in the SD joints, while concrete crushing was observed at the bottom joint.
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Acknowledgments
The authors acknowledge the Federal Highway Administration of the DOT for providing funding for this research through UB’s MCEER. The help of UB’s SEESL personnel in the execution of this experimental program is appreciated greatly. The Bodossaki Foundation and the Alexander S. Onassis Public Benefit Foundation also are acknowledged for providing partial financial support to the first author. The opinions and findings reported in this paper are those of the authors and not the sponsors.
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Information & Authors
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Published In
Journal of Bridge Engineering
Volume 19 • Issue 10 • October 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Aug 23, 2013
Accepted: Jan 23, 2014
Published online: Mar 7, 2014
Discussion open until: Aug 7, 2014
Published in print: Oct 1, 2014
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