1978•Journal of the Technical Councils of ASCERequires access

Retrofitting Bridges to Increase Seismic Resistance

O H Degenkolb

Abstract

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.

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Key concepts: Retrofitting, Seismic retrofit, Earthquake resistance, Engineering, Earthquake resistant structures, Civil engineering, Seismic resistance, Forensic engineering