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Rocking Behavior and Retrofit of Tall Bridge Piers

by Abolhassan Astaneh-Asl, Univ of California, Berkeley, United States,
Jie-Hua Shen, Univ of California, Berkeley, United States,



Document Type: Proceeding Paper

Part of: Structural Engineering in Natural Hazards Mitigation

Abstract:

In the aftermath of the damage to the San Francisco Oakland Bay bridge, due to the 1989 earthquake, a comprehensive study of the seismic behavior of the bridge was undertaken. This paper summarized the studies related to the rocking motion of a major pier in the bridge. Several seismic retrofit schemes were studied and one of the feasible retrofit solutions was to use semi-rigid seismic connections at the base of the pier and to permit limited and pre-designed rocking of the pier to take place during the future major earthquakes.

Subject Headings: Seismic design | Structural behavior | Seismic tests | Piers | Steel bridges | Rehabilitation | Steel structures

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