TY  - EJOU
AU  - Zhang, Huayi 
AU  - Song, Maobin 
AU  - Shen, Lei 
AU  - Alkayem, Nizar Faisal 
AU  - Cao, Maosen 

TI  - Discrete Numerical Study on Type II Fracture of Partially Detached Concrete Panels in Cold Region
T2  - Structural Durability \& Health Monitoring

PY  - 2025
VL  - 19
IS  - 1
SN  - 1930-2991

AB  - The concrete panel of earth-rock dams in cold regions tends to crack due to the combination effect of non-uniform foundation settlement, ice expansion loads, and freeze-thaw damage. In this work, simulations are designed to investigate the effects of freeze-thaw damage degrees on the fracture behavior caused by the partial detachment and ice expansion loads on concrete panels. Results show that the range of detached panels and freeze-thaw damage degree are the dominant factors that affect the overall load-bearing capacity of the panel and the failure cracking modes, whereas the panel slope is a secondary factor. The failure cracking modes are found to be a combination of type II fracture modes, including compression-shear and tension-shear cracking. Besides, with the increase of detachment area and the degree of freezing-thawing damage, the concrete panels are prone to appear bending tension cracks at the bottom and a more serious smeared crack layer at the top.
KW  - Concrete panels; freeze-thaw damage; compression-shear crack; tension-shear crack

DO  - 10.32604/sdhm.2024.052869