Permanent Deformation Characteristics of Coarse Grained Subgrade Soils under Train-Induced Repeated Load

5Citations
Citations of this article
9Readers
Mendeley users who have this article in their library.

Abstract

This paper presents the results of a laboratory experiment that aimed to characterize the permanent deformation behavior of coarse grained soils. To evaluate the effects of the cyclic stress amplitude, initial mean stress, and initial stress ratio on the permanent axial deformation, six series of repeated load triaxial tests were performed. The results indicate that permanent deformation of coarse grained soils increased with increasing cyclic stress amplitude. In particular, for relative low cyclic stress levels, accumulation rate of permanent deformation decreased progressively with number of cycles and eventually reached an equilibrium state. The initial stress ratio was also found to obviously facilitate the buildup of axial deformation since it means higher deviatoric stress as the mean pressure kept constant. As the initial stress ratio was less than the slope of static failure line, the experimental results indicated that the increase of initial mean stress enhanced the capability of resisting deformation. A simplified mechanistic empirical prediction model was proposed, which predicted the permanent deformation as product of four independent functions about cyclic stress amplitude, initial mean stress, initial stress ratio, and number of load cycles. Satisfactory predictions of the permanent deformation behavior of coarse grained soils were obtained with the proposed model.

Cite

CITATION STYLE

APA

Ling, X., Li, P., Zhang, F., Zhao, Y., Li, Y., & An, L. (2017). Permanent Deformation Characteristics of Coarse Grained Subgrade Soils under Train-Induced Repeated Load. Advances in Materials Science and Engineering, 2017. https://doi.org/10.1155/2017/6241479

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free