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Title:

TRACK MODULUS: ITS MEANING AND FACTORS INFLUENCING IT

Accession Number:

00677726

Record Type:

Component

Availability:

Transportation Research Board

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Washington, DC 20001 USA
Order URL: http://www.trb.org/Publications/Pages/262.aspx

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Order URL: http://worldcat.org/isbn/0309061016

Abstract:

Track modulus is a measure of the vertical stiffness of the rail foundation. Another parameter, track stiffness, is a measure of the vertical stiffness of the entire track structure. Both are related to the track performance. In order to provide a basis for assessing and modifying track performance, the definitions of track modulus and track stiffness are reviewed, and four methods of determining track modulus or track stiffness are discussed. On the basis of analysis with a track structure model, the effects of superstructure and substructure factors influencing track modulus are illustrated and the means of altering track modulus are suggested. Finally, the relationship between the track modulus and track performance is discussed. The subgrade soil conditions are shown to have the greatest influence on track modulus and stiffness. Next in importance are the combined ballast-subballast thickness and the vertical tie-fastener stiffness.

Supplemental Notes:

This paper appears in Transportation Research Record No. 1470, Railroad Research Issues.

Monograph Title:

Railroad research issues

Monograph Accession #:

01401292

Language:

English

Authors:

Selig, Ernest T
Li, Dingqing

Pagination:

p. 47-54

Publication Date:

1994

Serial:

Transportation Research Record

Issue Number: 1470
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309061016

Features:

Figures (8) ; References (14) ; Tables (4)

Old TRIS Terms:

Subject Areas:

Geotechnology; Highways; Railroads

Files:

TRIS, TRB, ATRI

Created Date:

May 22 1995 12:00AM

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