Seismic Evaluation of Bridges on and over the Parkways in Western Kentucky--Summary Report

Abstract

This report (KTC-07-02/SPR246-02-1F) provides an overall summary on the seismic investigative study performed on bridges on/over the five parkways in Western Kentucky. The comprehensive study was further divided into the followings tasks, each reported separately as follows: (1) The first report of this study (KTC-07-03/SRP246-02-2F) involved data collection and field inspection of bridges on/over the parkways. The resulting inventory contains data of three hundred fifty-one (351) bridges on/over the parkways, detailing their construction type, soil profile, present condition, etc. (2) In KTC-07-04/SPR246-02-3F, a preliminary seismic evaluation and ranking was performed on all bridges within the inventory. Details of the evaluation and ranking procedure are outlined. In this task seventeen (17) bridges, that are deemed susceptible to major earthquakes, were identified. (3) Detailed seismic evaluations of the seventeen (17) bridges were subsequently carried out using time-history analysis for a projected 250-year seismic event. The results of the analysis are presented in KTC-07-05/SPR246-02-4F. (4) KTC-07-06/SPR246-02-5F presents the preliminary evaluation and ranking of bridge embankments along the parkways. (5) The last report, numbered KTC-07-07/SPR246-02-6F, provides the latest seismic hazard maps for the expected earthquake (EE), probable earthquake (PE), and maximum credible earthquake (MCE), which will be used in seismic analysis and design of highway infrastructures in Kentucky.