@article{Liu2024, 
author = {Guomin Liu and Mei Huang and Mingming Cao and Hua Chen},
title = {Experimental Study on Creep Characteristics and Damage Model of Carbonaceous Slate After Freeze-Thaw},
year = {2024},
journal = {Journal of Highway and Transportation Research and Development (English Edition)},
volume = {18},
number = {2},
pages = {46-55},
keywords = {tunnel engineering, carbonaceous slate, creep, freezing-thaw, loading, damage model},
url = {https://www.sciopen.com/article/10.26599/HTRD.2024.9480013},
doi = {10.26599/HTRD.2024.9480013},
abstract = {Taking the carbonaceous slate of Zhuokeji tunnel on the Wenchuan-Ma, erkang expressway as the research subject, triaxial compression creep tests were conducted under various freeze-thaw cycles to analyze the creep strain characteristics and long-term strength of the carbonaceous slate. Assuming that the aging damage of rock under load follows the Weibull probability density distribution, the loaded damage variable is defined. The freeze-thaw damage variable is defined according to the phenomenological theory of damage mechanics. Considering the coupling effect of freeze-thaw and stress, a total damage variable for freeze-thaw and load is constructed. Based on the creep behavior of carbonaceous slate, the structure of the H-H|N-N|S creep model is determined. Based on this, the damage evolution is carried out, and a new creep damage model that can reflect the coupling of freeze-thaw and stress is obtained, which is extended to a three-dimensional stress state. The solution method for model parameters is provided, and the damage evolution law is analyzed. The creep characteristics of carbonaceous slate are identified using the established model. A traditional model is introduced for comparison, and the simulation comparison curve is analyzed to verify the feasibility and rationality of the new model.}
}