Experimental Investigations on the Lateral Cyclic Response of Post-Tensioned Rocking Steel Bridge Piers
Publication: Journal of Structural Engineering
Volume 147, Issue 12
Abstract
This paper presents the results of a series of unidirectional quasi-static cyclic tests on 1/3-scale post-tensioned rocking steel bridge column specimens designed to rock at the interface with the foundation. The objective was to examine the effects of column diameter-to-thickness ratio, base plate, and energy dissipaters and their locations on the lateral cyclic behavior of the system. Site-specific cyclic displacement loading protocols were developed by performing time-history analyses of the pier. Emphasis was placed upon the sources of lateral response degradation including elastic restoring force reduction, local buckling, and energy dissipater failure. Strain distribution at the rocking plane and along the height, local bulging of the column, and uplift profile are discussed. The influence of multiple loading on the lateral response was also investigated. A component testing program was conducted to characterize the cyclic loss of post-tension force due to wedge seating in a typical industry monostrand anchorage system. The column test results demonstrate that a stable and robust self-centering response can be achieved with minimal damage to the column and most of the hysteretic energy is confined within the replaceable elements.
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Data Availability Statement
Some or all the experimental data presented in this study can be made available by the corresponding author upon reasonable request.
Acknowledgments
The research reported herein was sponsored by the Natural Sciences and Engineering Research Council (NSERC) of Canada under the Collaborative Research and Development (CRD) grant program, and several industrial partners including the Canadian Institute of Steel Construction, Rapid Span Structures Ltd., S-FRAME Software Inc., Emil Anderson Construction Inc., and Klohn Crippen Berger Ltd. The authors would like to acknowledge Sumiden Wire and DSI Canada Civil for providing materials for monostrand anchorage testing program. The support provided by Compute Canada is gratefully acknowledged.
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Published In
Journal of Structural Engineering
Volume 147 • Issue 12 • December 2021
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© 2021 American Society of Civil Engineers.
History
Received: Dec 1, 2020
Accepted: Jul 28, 2021
Published online: Sep 27, 2021
Published in print: Dec 1, 2021
Discussion open until: Feb 27, 2022
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