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SEISMIC DESIGN AND RETROFITTING OF HIGHWAY BRIDGES IN THE UNITED STATES

Ian M. Friedland, Ian G. Buckle

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Abstract

The state-of-practice for seismic design of highway bridges has evolved over more than 50 years in the U.S. Currently, all new Federal-aid highway bridges designed and constructed in the U.S. must consider earthquake demands. There are not nationwide requirements for evaluating in-service bridges for seismic vulnerabilities as yet, but many states have initiated vulnerability screening and retrofitting programs. Such programs are likely to increase the overall seismic resistance of the national highway system in the U.S.

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What this paper is about

The state-of-practice for seismic design of highway bridges has evolved over more than 50 years in the U.S. Currently, all new Federal-aid highway bridges designed and constructed in the U.S. must consider earthquake demands. There are not nationwide requirements for evaluating in-service bridges for seismic vulnerabilities as yet, but many states have initiated vulnerability screening and retrofitting programs. Such programs are likely to increase the overall seismic resistance of the national highway system in the U.S.

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Available abstract

The state-of-practice for seismic design of highway bridges has evolved over more than 50 years in the U.S. Currently, all new Federal-aid highway bridges designed and constructed in the U.S. must consider earthquake demands. There are not nationwide requirements for evaluating in-service bridges for seismic vulnerabilities as yet, but many states have initiated vulnerability screening and retrofitting programs. Such programs are likely to increase the overall seismic resistance of the national highway system in the U.S.

Key concepts: Retrofitting, Seismic retrofit, Seismic analysis, Vulnerability (computing), State highway, State (computer science), Earthquake resistant structures, Engineering

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