Performance of a Damage-Protected Highway Bridge Pier Subjected to Bidirectional Earthquake Attack
Publication: Journal of Structural Engineering
Volume 135, Issue 5
Abstract
Recent earthquakes such as Loma Prieta, Northridge, and Kobe have demonstrated a need for a new design philosophy of bridge piers that avoids damage in order to ensure postearthquake serviceability and reduce financial loss. Damage avoidance design (DAD) is one such emerging philosophy that meets these objectives. DAD details require armoring of the joints; this eliminates the formation of plastic hinges. Seismic input energy is dissipated by rocking coupled with supplemental energy dissipation devices. In this paper the theoretical performance of a DAD bridge pier is validated through bidirectional quasi-static and pseudodynamic tests performed on a 30% scale specimen. The DAD pier is designed to rock on steel–steel armored interfaces. Tension-only energy dissipaters are used to increase tie down forces and further reduce dynamic response. The seismic performance of the DAD pier is compared to that of a conventional ductile pier. Results show that one can have 90% confidence that the DAD pier will survive a design basis earthquake without sustaining any damage, whereas for the conventional design substantial damage is sustained.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 135 • Issue 5 • May 2009
Pages: 469 - 478
Copyright
© 2009 ASCE.
History
Received: May 17, 2006
Accepted: Oct 8, 2007
Published online: May 1, 2009
Published in print: May 2009
Notes
Note. Associate Editor: Marvin W. Halling
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