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Stress Measurements On The I 65 Bridge Over The Ohio River At Louisville, Theodore Hopwood Ii, Christopher M. Oberst

Kentucky Transportation Center Research Report

Kentucky Transportation Center personnel conducted measurements of live stresses on structural members of the I 65 (John F. Kennedy Memorial) Bridge over the Ohio River. That work was performed in conjunction with an extensive flaw evaluation of the bridge by Hazelet & Erdal Consulting Engineers.

The measurements were performed by placing strain gages on the upper chord (an H-beam) and a vertical post and transverse strut that were framed into the upper chord at PP63 on the West truss. Measurements were performed using battery-powered data logging instruments that were capable of unattended strain measurement. The units were used to monitor …

Summary Of Stress Evaluations Of Welded Steel Bridges On Coal-Haul Routes, Theodore Hopwood Ii, Keith J. Hogan, Christopher M. Oberst

Kentucky Transportation Center Research Report

Stress analyses were performed on continuous girder welded steel bridges on extended weights coal-haul routes. The tests were intended to determine whether extended weight coal trucks pose fatigue problems to those bridges. Measurements were performed by strain gaging selected bridges subject to high coal transport tonnages. Stress measurements were conducted on fatigue-prone weld details or test sites where high tensile stresses were anticipated. Test sites on the bridges were instrumented with strain gages. Strains induced by routine traffic including coal trucks were monitored for periods of one to two weeks. Unattended monitoring of the variable amplitude strain data was performed …

Guidelines For Permitting Overloads, Part 2: Statistical Analysis Of Overload Vehicle Effects On Indiana Highway Bridges, Donald W. White, J. A. Ramirez, N Prasad, Thomas Kuczek

JTRP Technical Reports

This report summarizes an analytical investigation carried out to develop a set of guidelines for regulation of overload vehicles in Indiana. A formula based first phase evaluation of overload permit requests is developed through statistical study of the rating of a representative sample of the highway bridges in Indiana using a representative sample of overload vehicles observed in the state in 1990 and 1991 plus the HS 20 design vehicle and the two Indiana Toll Road loadings. A sample of 148 bridges is chosen from a total population of 3700 Indiana highway bridges using a proportionate stratified random sampling process. …