Performance of a Damage Protected Highway Bridge Pier Subjected to Bidirectional Earthquake Attack

Type of content
Journal Article
Thesis discipline
Degree name
Publisher
University of Canterbury. Civil and Natural Resources Engineering
Journal Title
Journal ISSN
Volume Title
Language
Date
2009
Authors
Solbrg, K.M.
Mashiko, N.
Mander, J.B.
Dhakal, Rajesh
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 post-earthquake 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 bi-directional 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 percent confidence that the DAD pier will survive a design basis earthquake without sustaining any damage, whereas for the conventional design substantial damage is sustained.

Description
Citation
Solbrg, K.M., Mashiko, N., Mander, J.B., Dhakal, R.P. (2009) Performance of a Damage Protected Highway Bridge Pier Subjected to Bidirectional Earthquake Attack. Journal of Structural Engineering, 135(5), pp. 469-478.
Keywords
bridge abutments, damage prevention, pseudodynamic method, precast concrete, post-tensioning, highways, earthquakes
Ngā upoko tukutuku/Māori subject headings
ANZSRC fields of research
Fields of Research::40 - Engineering::4005 - Civil engineering::400506 - Earthquake engineering
Fields of Research::40 - Engineering::4005 - Civil engineering::400510 - Structural engineering
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