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Effect of increase in load and frequency on the resiliency of railway ballast

Journal Article


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Abstract


  • This paper presents the results of a series of large-scale cyclic triaxial tests conducted on ballast subjected to increased load and frequency of loading. For a given loading, the laboratory test data demonstrate that the resilient modulus of ballast is influenced by the frequency of loading. Both strain hardening and strain softening can be observed in response to increasing magnitude of load and frequency. A correlation between the resilient modulus and bulk stress is introduced to describe both the strain-hardening and strain-softening behaviour of ballast under different frequencies. A good corroboration between the cyclic stress ratio and the accumulated permanent strain and the resilient strain is demonstrated.

Publication Date


  • 2018

Citation


  • Sun, Q., Indraratna, B. & Ngo, N. (2018). Effect of increase in load and frequency on the resiliency of railway ballast. Géotechnique, Online First 1-8.

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=2858&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1856

Number Of Pages


  • 7

Start Page


  • 1

End Page


  • 8

Volume


  • Online First

Place Of Publication


  • United Kingdom

Abstract


  • This paper presents the results of a series of large-scale cyclic triaxial tests conducted on ballast subjected to increased load and frequency of loading. For a given loading, the laboratory test data demonstrate that the resilient modulus of ballast is influenced by the frequency of loading. Both strain hardening and strain softening can be observed in response to increasing magnitude of load and frequency. A correlation between the resilient modulus and bulk stress is introduced to describe both the strain-hardening and strain-softening behaviour of ballast under different frequencies. A good corroboration between the cyclic stress ratio and the accumulated permanent strain and the resilient strain is demonstrated.

Publication Date


  • 2018

Citation


  • Sun, Q., Indraratna, B. & Ngo, N. (2018). Effect of increase in load and frequency on the resiliency of railway ballast. Géotechnique, Online First 1-8.

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=2858&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1856

Number Of Pages


  • 7

Start Page


  • 1

End Page


  • 8

Volume


  • Online First

Place Of Publication


  • United Kingdom