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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Rail-Mounted Strain Gauges for Tie Reaction Measurement Under Dynamic Loading

Document Series
Research Results
Federal Railroad Administration
Report Number
RR 22-08
Subject Track
Strain gauge, calibration, tie reaction force, tie support condition, Differential Shear Strain, DSS, track, wheel load, railroad

Several research and field applications have backed the crib circuit (CC) (i.e., installed between two ties) for vertical wheel load measurement. However, no studies have explored whether the tie circuit (i.e., installed on top of a tie) is valid for rail-tie interface force measurement. Thus, questions remain about its accuracy. On October 2021, the Federal Railroad Administration (FRA) tasked ENSCO Inc., and Oklahoma State University (OSU) to field-validate this approach under actual train loading. This work took place in Chambersburg, PA.

Last updated: Tuesday, May 10, 2022