黑龙江科技大学学报2026，Vol.36Issue(5)：744-752,759,10.DOI:10.3969/j.issn.2095-7262.2026.05.007
冻融-荷载作用下红砂岩的宏、细观损伤特征
Macroscopic and microscopic damage characteristics behind red sandstone under freeze-thaw and loading
摘要
Abstract
This paper seeks to explore the macro-and micro-damage evolution laws behind red sand-stone under the coupling effect of freeze-thaw cycles and loading.The study includes using the freeze-thaw cycle tests,uniaxial compression tests,theoretical analysis,and discrete element numerical simula-tion methods to systematically analyze the mechanical property degradation,energy dissipation character-istics,and micro-damage mechanisms of the red sandstone;and developing a freeze-thaw damage consti-tutive model with elastic properties.The results show that with the increase in freeze-thaw cycles,the peak strength and elastic modulus of red sandstone decrease nonlinearly.After 35 freeze-thaw cycles,the elastic modulus drops by 52.83%,and the failure mode changes from brittle to ductile.The uniaxial simulation tests on freeze-thawed red sandstone indicate that after 35 freeze-thaw cycles,the contact force among mineral particles inside the sandstone decreases by 31.4%,with the increase of the total number of cracks by 29.0%,and together with the failure process dominated by shear cracks,indicating that the numerical simulation results highly matches the experimental findings.关键词
冻融循环/能量耗散/损伤本构模型/矿物颗粒接触力/裂纹分布特征Key words
freeze-thaw cycle/energy dissipation/damage constitutive model/mineral particle con-tact force/crack distribution characteristics分类
建筑与水利引用本文复制引用
高红梅,张露..冻融-荷载作用下红砂岩的宏、细观损伤特征[J].黑龙江科技大学学报,2026,36(5):744-752,759,10.基金项目
国家自然科学基金项目(52474218) （52474218）
黑龙江省省属高等学校基本科研业务费项目(2025-KYYWF-ZR0621) （2025-KYYWF-ZR0621）
