摘要
为了利用损伤力学理论分析岩体结构中的不连续块体,作者首先介绍了不连续块体的裂隙面积密度和等效损伤体等概念,进而分析了等效损伤体的损伤张量和真应力。在提出平均有效应力的概念之后,完成了有限单元法的离散化过程,最后给出了一个完整的计算不连续块体的数值方法。
There are discontinuous units in rock mass which are different from both intact rock and high fractured rock. Discontinuous units should be analysed by damage mechanics instead of continuum mechanics. From the area density of fissures a damaged body is defined to he composed of discontinuous units. Damage tensor and pure stress are studied on such a body. Assuming an average effective stress, the constiutive relation for the equivalent damaged body and the reiteration formula- about the finite element methed are then derived. Finally, some simple examples for compulation give satisfactory results.
出处
《地质科学》
CAS
CSCD
北大核心
1991年第3期288-297,共10页
Chinese Journal of Geology(Scientia Geologica Sinica)
关键词
岩体
结构力学
面积密度
损伤张量
area density, Equivalent damaged body, damage tensor, average effective stress