Ductility Analysis for Seismic Retrofit of Multi-Column Bridge Structures, Santa Monica Viaduct

by Mark Seyed,



Document Type: Proceeding Paper

Part of: Structural Engineering in Natural Hazards Mitigation

Abstract:

A new procedure is being developed for the ductility analysis of multi-column bridges. The formation of the plastic hinges in the structure (columns and/or superstructure) is followed through stages of deformation to obtain an estimate on the capacity of a bridge frame to absorb seismic energy and to survive an earthquake. The goal is to provide adequate ductility for a structure to withstand the most credible earthquake and prevent collapse (additional serviceability is required for 'Major Structures'.) With the limited funds available for the seismic retrofit of California bridges, CALTRANS has been screening all bridges to prioritize the retrofit work. The new streamlined procedure will help in reducing the retrofit cost. The Santa Monica Viaduct is used as a case study to show the different aspects of the new procedure.

Subject Headings: Structural analysis | Rehabilitation | Plastic hinges | Seismic tests | Earthquake resistant structures | Ductility | Viaducts | California | United States

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