Outdoor Test of a Prefabricated Column–Pile Cap–Pile System under Combined Vertical and Lateral Loads
Publication: Journal of Bridge Engineering
Volume 25, Issue 8
Abstract
An outdoor test was conducted on a prefabricated column–pile cap–pile system at a cohesive soil site. The half-scale test unit consisted of a precast bridge column, a precast pile cap, and eight steel piles. The components were connected utilizing socket connections that were preformed in the pile cap with corrugated steel pipes. To evaluate the system performance and the behavior of various connections, the test unit was subjected to combined vertical and lateral loads at service conditions as well as at conditions representing extreme events. The test unit remained undamaged under the loads representing the service conditions, and a plastic hinge was formed in the column under loading conditions representing a seismic event. The column connection and pile connections exhibited excellent behavior as they maintained fixity with the formation of a column plastic hinge. The outdoor test demonstrated that up to 40% of column top displacement was produced by foundation flexibility at the service conditions. The description of the outdoor test and key results are included in this paper.
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Acknowledgments
This study was supported by the Iowa Highway Research Board (IHRB) and the Federal Highway Administration State Transportation Innovation Council (STIC). The authors would like to thank the members of the Technical Advisory Committee for their advice and suggestions.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 25 • Issue 8 • August 2020
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Oct 21, 2019
Accepted: Mar 13, 2020
Published online: Jun 3, 2020
Published in print: Aug 1, 2020
Discussion open until: Nov 3, 2020
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