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

Authors

Qideng Sun, University of WollongongFollow
Buddhima Indraratna, University of WollongongFollow
Ngoc Trung Ngo, University of WollongongFollow

RIS ID

130330

Publication Details

Sun, Q., Indraratna, B. & Ngo, N. (2019). Effect of increase in load and frequency on the resiliency of railway ballast. Géotechnique, 69 (9), 833-840.

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.