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Cyclic deformation of granular material subjected to moving-wheel loads

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Title: Cyclic deformation of granular material subjected to moving-wheel loads
Authors: Ishikawa, Tatsuya Browse this author →KAKEN DB
Sekine, Etsuo Browse this author
Miura, Seiichi Browse this author
Keywords: base course
cyclic load
special shear test
Issue Date: May-2011
Publisher: Canadian Science Publishing
Journal Title: Canadian Geotechnical Journal
Volume: 48
Issue: 5
Start Page: 691
End Page: 703
Publisher DOI: 10.1139/T10-099
Abstract: This paper describes a new testing method to examine the mechanical behavior of railroad ballast subjected to repeated train passages on ballasted track. Two types of cyclic loading tests, namely a single-point loading test and a moving-wheel loading test, were performed with small-scale models of ballasted track. Next, a "multi-ring shear apparatus" was developed as a type of torsional simple shear apparatus, and the applicability of a newly proposed multi-ring shear test to an element test of railroad ballast subjected to moving-wheel loads was examined by comparing the results of multi-ring shear tests with those of small-scale model tests. As a result, it was recognized that cumulative strain obtained from multi-ring shear tests is almost equivalent to the one derived from small scale-model tests. Moreover, it was revealed that the difference between loading methods has a considerable influence on the cyclic plastic deformation of railroad ballast because settlement in a moving-wheel loading test was much larger than the one in a single-point loading test. These results lead to the conclusion that a multi-ring shear test has an excellent applicability to the estimation of deformation behavior of granular materials subjected to moving-wheel loads.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 石川 達也

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