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10
Feb
2020
Technical Reports
Laboratory Study of the Failure Characteristics of Fouled Ballast: Phase II
Subject
Track
Keywords: Railroad, track, substructure, ballast, fouling, water content, loading, laboratory test, box test, triaxial test, box test
Abstract: This report presents the results of a series of triaxial tests and modified box tests performed on abraded ballast at the University of Massachusetts Amherst. While Phase I...
Report Number
DOT/FRA/ORD-20/04
Office
RDI-21
2
Dec
2019
Technical Reports
Wheel Bearing Brake/Instrumented Wheelset (WBB/IWS) Friction Characterization Study
Subject
Track
Keywords: Wheel/rail interface, W/R, friction, angle of attack, AoA, traction curves, instrumented wheelset, IWS, rolling contact fatigue, wear, tribometer
Abstract: The wheel/rail (W/R) interface experiences variable friction conditions during in-service operation. This is due mainly to the application of top-of-rail friction modifiers (...
Report Number
DOT/FRA/ORD-19/46
Office
RDI-21
4
Oct
2019
Technical Reports
A Study of Environmental and Track Factors that Contribute to Abrasion Damage of Concrete Ties
Subject
Track
Keywords: Concrete ties, tie abrasion, mud pumping, ballast fouling, track drainage, track
Abstract: Kansas State University (KSU), the University of Florida, and Infrastructure Research, LLC inspected 36 railroad track sites with suspected concrete bottom tie abrasion to...
Report Number
DOT/FRA/ORD-19/38
Office
RDI-21
18
Sep
2019
Technical Reports
Detection of Concrete Tie Rail Seat Deterioration
Subject
Track
Keywords: Concrete tie, rail seat deterioration, RSD, rail seat abrasion, laboratory testing, detection, inspection, gage restraint measurement system, GRMS, track geometry
Abstract: Rail seat deterioration (RSD) is a loss of concrete in the rail seat area of concrete ties that may compromise safety by increasing track gage, reducing fastener toe load, and...
Report Number
DOT/FRA/ORD-19/33
Office
RDI-21
13
Sep
2019
Technical Reports
A New Method for Detecting the Onset of Scour and Managing Scour-Critical Bridges
Subject
Track
Keywords: Scour, bridges, monitoring, accelerometer, tilt meter, tilt sensor, motion sensor, real-time
Abstract: This project explores monitoring railroad bridges using a hybrid sensor that measures acceleration, tilt, and temperature. The objective of the research is to detect scour and...
Report Number
DOT/FRA/ORD-19/32
Office
RDI-21