A Constitutive Model for Damage of Highway Subgrade Soil under the Coupling of Freeze-Thaw Cycles and Loads

DOI

10.2991/978-94-6463-610-9_11How to use a DOI?

Keywords

Highway subgrade soil; freeze-thaw cycle; Coupling effect; Damage constitutive model

Abstract

To investigate the influence of freeze-thaw cycles and loading on the mechanical characteristics of highway subgrades, a damage constitutive model under the coupled effect of freeze-thaw cycles and loading was constructed by integrating the Weibull distribution with Lemaitre’s effective stress principle, based on statistical principles and damage mechanics. The theoretical expressions for model parameters were determined according to the geometric conditions at the peak point of the stress-strain curve. The proposed damage constitutive model was validated using experimental data. Results indicated that the developed damage constitutive model showed good agreement with the experimental stress-strain curves, and all required parameters could be obtained through triaxial tests. With the number of freeze-thaw cycles held constant, the peak stress and elastic modulus of the highway subgrade increased with rising confining pressure. Conversely, keeping the confining pressure unchanged, the peak stress and elastic modulus decreased with an increase in the number of freeze-thaw cycles. The model effectively described the stress-strain relationship of subgrade soils in seasonal frozen ground regions and provided a theoretical reference for subgrade engineering in permafrost areas.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Download article (PDF)

TY  - CONF
AU  - Jiawei Wang
AU  - Xiaojian Ren
PY  - 2024
DA  - 2024/12/16
TI  - A Constitutive Model for Damage of Highway Subgrade Soil under the Coupling of Freeze-Thaw Cycles and Loads
BT  - Proceedings of the 2024 International Conference on Rail Transit and Transportation (ICRTT 2024)
PB  - Atlantis Press
SP  - 95
EP  - 103
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-610-9_11
DO  - 10.2991/978-94-6463-610-9_11
ID  - Wang2024
ER  -