Determination of dynamic track modulus from measurement of track velocity during train passage

Priest, J. A. and Powrie, W. (2009) Determination of dynamic track modulus from measurement of track velocity during train passage. Journal of Geotechnical and Geoenvironmental Engineering, 135, (11), 1732-1740. (doi:10.1061/(ASCE)GT.1943-5606.0000130).


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The measurement of track stiffness, or track modulus, is an important parameter for assessing the condition of a railway track. This paper describes a method by which the dynamic track modulus can be determined from the dynamic displacements of the track during normal train service, measured using geophones. Two techniques are described for calculating the track modulus—the inferred displacement basin test (DBT) method and a modified beam on an elastic foundation (BOEF) method. Results indicate that the viscoelastic response of the soil will influence the value of track modulus determined using the DBT method. The BOEF method was therefore used to calculate the apparent increase in axle load due to train speed. Hanging or partly supported sleepers were associated with a relatively small increase in dynamic axle loads with train speed.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1061/(ASCE)GT.1943-5606.0000130
ISSNs: 1090-0241 (print)
Related URLs:
Keywords: railroad tracks, stiffness, velocity, dynamic loads, measurement
Subjects: T Technology
T Technology > TA Engineering (General). Civil engineering (General)
Divisions : University Structure - Pre August 2011 > School of Civil Engineering and the Environment
ePrint ID: 75864
Accepted Date and Publication Date:
November 2009Published
Date Deposited: 12 Mar 2010
Last Modified: 31 Mar 2016 13:09
Copy of RRUK 2: Universities' Centre for Rail Systems Research
Funded by: EPSRC (EP/D080207/1)
Led by: William Powrie
7 September 2006 to 6 September 2010

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