水资源与水工程学报2016，Vol.27Issue(2)：216-222,7.DOI:10.11705/j.issn.1672-643X.2016.02.40
单裂隙岩石高温作用下的力学性能分析
Analysis of mechanical property single fracture rock under action of high temperature
摘要
Abstract
According to similarity theory, the paper simulated natural fracture rock through prefabricating crack in simulation material,and analyzed the influence of high temperature and fissure angle on mechani-cal properties of rock mass under temperature of 20-800 ℃ , and compared the experimental results of white sandstone;based on the Lemaitre strain equivalence principle and macroscopic statistical distribu-tion theory, it established the damage equation of high temperature and loading rock mass. The research results show that before 400℃, the mechanical properties of simulation materials and white sandstone are improved with the increase of temperature,after 400 ℃,the mechanical performance begin to degradate, 400 ℃ is presumed as the stress -strain curve threshold of white sandstone;the uniaxial compressive strength and longitudinal wave velocity of blocks decrease as the increase of prefabricated crack angle, when the angle is more than 45°,the trend is contrary. The damage of high temperature and loading rock mass is a coupled process of high temperature and stress. The total damages are smaller than the sum of high temperature and load damage. The trend of fracture inclination angle and high temperature effect on rock damage is consistent with the trend of the strength关键词
模拟材料/高温/裂隙倾斜角/单轴压缩/损伤演化模型Key words
simulation material/high temperature/fissure angle/uniaxial compression/damage evolu-tion model分类
建筑与水利引用本文复制引用
徐赔,陈有亮,王苏然,李晓鹏,杨振坤..单裂隙岩石高温作用下的力学性能分析[J].水资源与水工程学报,2016,27(2):216-222,7.基金项目
国家自然科学基金项目(10872133) （10872133）
上海市自然科学基金项目(14ZR1428200) （14ZR1428200）
上海理工大学土木工程专业学位研究生培养基地项目 （）
