00139848

Component

http://onlinepubs.trb.org...s/trr/1976/579/579-004.pdf

https://scholar.google.co...SANO&publication_year=1976

After the earthquake at San Fernando on February 9, 1971, significant changes were made in structural details of bridges designed by the Division of Structures, California Department of Transportation. New Seismic design criteria were developed that consider both fault proximity and local soil conditions. Response coefficient curves, which are a key element of these new criteria, were developed by determining average elastic response spectra for rock motion and then modifying these spectra to reflect the influence of soil conditions. Considerable engineering judgment was used in assessing ductility and acceptable risk so that the elastic curves could be scaled down to a desirable level for design. Response coefficient curves can be used to find suitable equivalent static force coefficients or as design spectra for use in a dynamic analysis of a response spectrum. The simplified design method is adequate for small structures, but a dynamic analysis is required to accurately predict the response of long, curved structures with intermediate hinges and widely varying column lengths.

Prepared for the 54th Annual Meeting of the Transportation Research Board. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

01411436

p. 27-35

1976

Transportation Research Record

54th Annual Meeting of the Transportation Research Board

0309024935

Figures (10) ; References (3) ; Tables (1)

Bridge design; Bridges; Design; Ductility; Elasticity (Mechanics); Fault location; Seismicity; Soils; Structural design

Design criteria; Response spectra; Soil conditions

Bridges and other structures; Design; Geotechnology; Highways

TRIS, TRB

Oct 6 1976 12:00AM

• ANALYSIS OF A CONTINUOUS CURVED BOX GIRDER BRIDGE
• APPLICATIONS OF A BRIDGE MEASUREMENT SYSTEM
• FATIGUE ANALYSIS FROM STRAIN GAUGE DATA AND PROBABILITY ANALYSIS
• FIELD TESTING OF AGUASABON RIVER BRIDGE IN ONTARIO
• PRACTICAL RETROFIT MEASURES TO IMPROVE THE SEISMIC PERFORMANCE OF EXISTING HIGHWAY BRIDGES
• PREDICTION OF BRIDGE GIRDER STRESS HISTOGRAMS FROM TRUCK TYPE DISTRIBUTION
• SEISMIC RESPONSE OF A CURVED HIGHWAY BRIDGE MODEL
• STRONG-MOTION INSTRUMENTATION PROGRAM FOR STATE HIGHWAY BRIDGES