摘要
裂隙岩体在静力或动力作用下产生的变形主要是裂隙的变形，岩石变形相对很小，两者不相连续。用非连续变形分析方法研究岩体的非连续特性才能得到微观的具体反映。在动力或静力作用下，位移实际上与时间有关，故对静力问题仍可用动力方法。只有对很小位移的静力问题，当岩体处于稳定情况下，才可忽略这一时间因素。对极大位移的动力问题，如爆炸等，用非连续变形分析方法计算能得到很好的结果。本文用非连续变形分析方法对以上问题作了探讨，并用算例对若干静力和动力问题进行了分析。
Under static and dynamic actions, the deformation in jointed rock mass is formed mainly from that of joints, and the deformation of rock block is very small. Both of them are discontinuous. Only if the method of discontinuous deformation analysis (DDA) is used, the discontinuity nature of rock mass can be concretely displayed. No matter whether the deformation is formed under statics or dynamic conditions, it is always related to the time factor. This means that the dynamic method can still be used in static problems. If the rock mass has very small displacement in static problems and is in very stable condition, the time factor can be neglected. For dynamic problems with large displacement such as blast, good calculative results can be gained by means of DDA. In this paper, the above problems and some static and dynamic examples are analysed and discussed.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
1996年第6期46-54,共9页
Chinese Journal of Geotechnical Engineering
关键词
裂隙岩体
非连续变形分析
静力
动力
岩体力学
jointed rock mass, discontinuous deformation analysis, block element, static method, dynamic method.
