摘要
通过平面应力条件下闭合断续节理岩体的破坏试验，采用自行研制的高压柔性加载装置施加垂向和侧向荷载，用千分表和激光散斑照相技术量测试体位移场，用应变花量测试体平面应力场． 结果表明，激光散斑法用于测定闭合断续节理岩体的位移场效果良好，其测值比对应点千分表测值偏小１４％ 左右．据所测得的位移场和应力场，研究了裂纹尖端应力场的演变及裂纹扩展的路径，分析了试体的变形和破坏特征，测定了翼裂纹初裂角，探讨了试体的破坏机理．
Biaxial compression tests on rockmass containing intermittent jonts under plane stress condition were made, where a new high pressure soft loading appratus was employed, and laser speckle photo technique was used for measuring displacement field. Experiment results indicate that the laser speckle method is effective, its measuring value is about 14% less than the measuring value of dial gauge. The initiation angle of wing crack, the evolution of stress field at the joint tip and the path of crack extension were studied. The deformation and failure characteristics and fracture mechanism of rockmass were also analyzed.
出处
《实验力学》
CSCD
北大核心
1999年第4期520-527,共8页
Journal of Experimental Mechanics
基金
台湾中兴工程顾问社资助
关键词
平面应力加载条件
闭合断续节理
岩体力学
试验
plane stress condition, close intermittent joints, laser speckle photo technique, model test
