STUDY OF CT MESO-EXPERIMENT OF ROCK DAMAGE UNDER CYCLIC LOAD
LI Shuchun1，2，XU Jiang1，YANG Chunhe1，3，PU Yibin2，MA Wei2
(1. Key Laboratory for the Exploitation of Southwestern Resources and the Environmental Disaster Control Engineering，Ministry of Education，Chongqing University，Chongqing 400030，China；2. State Key Laboratory of Frozen Soil Engineering，Cold and Arid Regions Environmental and Engineering Research Institute，Chinese Academy of Sciences，Lanzhou，Gansu 730000，China；3. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China)
Abstract：The computerized tomography(CT) real-time tests of fatigue damage meso-propagation law of rock under two-grade cyclic loads have been accomplished using specified loading equipment of CT machine. It is shown that in the first grade of cyclic load equal to the strength of 38% to 76%，the standard deviation of CT number under the maximum stress increases with the increase of the number of cycle；while the density and CT number tend to decrease with relatively small variations. The process shows that the accumulation of damage is slow. In the second grade of cycle load equal to the strength of 45% to 90%，although the number of cycle is less than that in the first grade，the changes of standard deviation of CT number under the maximum stress，density and CT number are larger than those in the first grade；in the cycle before failure，the standard deviations of CT number，density and CT number change greatly.
李树春,许江，杨春和,蒲毅彬，马巍. 循环荷载下岩石损伤的CT细观试验研究[J]. 岩石力学与工程学报, 2009, 28(08): 1604-1609.
LI Shuchun1，2，XU Jiang1，YANG Chunhe1，3，PU Yibin2，MA Wei2. STUDY OF CT MESO-EXPERIMENT OF ROCK DAMAGE UNDER CYCLIC LOAD. , 2009, 28(08): 1604-1609.
