Retrofitting Bridges to Increase Seismic Resistance

by Oris H. Degenkolb, (F.ASCE), Design Engr.; California Dept. of Transportation, Sacramento, Calif.,

Serial Information: Journal of the Technical Councils of ASCE, 1978, Vol. 104, Issue 1, Pg. 13-20

Document Type: Journal Paper


The 1971 San Fernanado, Calif., earthquake was a turning point in the seismic design of bridges. It disclosed a number of deficiencies in the bridges designed according to AASHTO specifications and common practices at that time. California initiated a program of identifying seismically deficient bridges and retrofitting them to make them more seismically resistant. Retrofit philosophy, prioritizing systems, retrofitting details, concepts, hardware and costs are considered.

Subject Headings: Bridge design | Rehabilitation | Bridges | Seismic tests | Seismic effects | Load and resistance factor design | Seismic design | Earthquakes | California | United States

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