Low-Damage Seismic Design for Accelerated Bridge Construction
Publication: Journal of Bridge Engineering
Volume 24, Issue 7
Abstract
In this research, a low-damage seismic design technology has been proposed for accelerated bridge construction (ABC). ABC low damage aims to minimize, and potentially eliminate, damage in a precast bridge during an earthquake. The low-damage design uses dissipative controlled rocking (DCR) connections between the precast elements in a bridge substructure. A DCR connection replaces the traditional plastic hinge at the column-to-footing or column-to-cap beam locations. DCR combines unbonded post-tensioning and externally attached metallic dissipaters to provide self-centering and energy absorption capabilities for the bridge, respectively. In this research, a half-scale precast bent was tested under quasi-static cyclic loading to validate the concept of low-damage design. The performance of the bent was compared against an equivalent bent with emulative cast-in-place connections. Results from testing suggested high performance of the low-damage bent. Following many cycles of large drift ratios, there was no damage or residual displacement in the bent. Findings from this research were implemented in the Wigram-Magdala Link Bridge in Christchurch, New Zealand, in July 2016. The bridge remained intact during the Kaikoura Earthquake on November 14, 2016.
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Acknowledgments
The authors would like to express their gratitude to the New Zealand Ministry of Science and Innovation–Natural Hazards Research Platform (NHRP) for supporting this research as part of the Advanced Bridge Construction and Design (ABCD) project at the University of Canterbury. The authors also thank technicians Gavin Keats and Russell McConchie for helping with the testing.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 24 • Issue 7 • July 2019
Copyright
© 2019 American Society of Civil Engineers.
History
Received: Mar 4, 2018
Accepted: Dec 12, 2018
Published online: May 3, 2019
Published in print: Jul 1, 2019
Discussion open until: Oct 3, 2019
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