Title: Seismic Rehabilitation of Concrete Bridge Substructures
Author(s): Bernard L. Meyers
Publication: Symposium Paper
Appears on pages(s): 191-206
Keywords: bridges (structures); columns (supports); costs; earthquake-resistant structures; substructures; Construction
Describes the seismic rehabilitation methods for the reinforced concrete substructures of two structural steel bridges in California, the South San Francisco Overhead Bridge and the Los Angeles River Bridge. The rehabilitation is part of the seismic retrofit program implemented by the California Department of Transportation (Caltrans) after the 1989 Loma Prieta earthquake. The analysis and design basically followed the general seismic retrofit principles and guidelines developed by Caltrans and other research institutes in recent years. However, due to the site conditions and retrofit limitations of these two bridges, innovative methods were employed to minimize the retrofit costs.