By Guowei MA, Yingxin ZHOU
This e-book includes the 7 keynote papers written by means of the specialists, foreign popular researchers and experts and seventy three technical papers which mirror the state-of-the-practice at the research of Discontinuous Deformation: New improvement and purposes. those papers have been chosen after a rigorous evaluation method. It represents the newest advances in numerical and analytical equipment on the topic of rock mechanics and engineering. Following the culture of the sequence, the most schemes of the papers are at the key block concept and its engineering functions, the discontinuous deformation research (DDA) procedure and the numerical manifold technique (NMM). even if, different correct themes, for instance, the distinct/discrete point technique, the meshless process, the finite aspect technique in rock mechanics and engineering purposes also are incorporated. For rock plenty the place the discontinuities dominate their behaviour in a rock engineering approach corresponding to rock slopes and underground rock caverns, the research of discontinuous deformation is of serious significance within the balance research and engineering layout. it's was hoping that this publication serves as an invaluable reference for either researchers and engineers at the new advancements and functions of a number of the to be had modeling suggestions and instruments during this more and more very important box of rock mechanics and engineering. issues lined: * Key Block conception and Engineering purposes * Discontinuous Deformation research (DDA) strategy * Numerical Manifold strategy (NMM) * Distinct/Discrete point strategy (DEM) * software of UDEC, 3DEC and PFC codes * Meshless technique and Rock Engineering functions * touch Algorithms * Wave Propagation via Rock Joint and Jointed Rock Mass * Deformation research of Heterogeneous fabrics * different complex Analytical and Numerical equipment in Rock Engineering * Experimental recommendations and size of Discontinuous Deformation * Case experiences and different correct subject matters
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Extra resources for Analysis of Discontinuous Deformation New Developments and Applications
2. Mechanical parameters In the simulation model, the landslide body consists of four types of rock material, which include residual deposits in the surface layer, strongly weathered rock mass, weakly weathered rock mass and foundation rock which is located below the lowest sliding surface. The thickness of the residual deposit and the strongly weathered rock mass is about 15∼20 m. In addition, at the bottom of the slope, a layer of silt sand, which has been formed by downstreem reservoir sedimentation, and in thickness of 20 m, is considered.
6). Figure 6. Input of height-deviation to triangle elements. 43 Analysis of Discontinuous Deformation: New Developments and Applications Figure 7. Input of height-deviation to triangle elements. The analysis results were shown in Fig. 7. In this figure, we can see that there appeared a great variation in the trajectory and velocity, when the roughness of the topographic model was taken into consideration, in comparison with the case where only the velocity ratio deviations were taken into account.
4−8 In order to reproduce the kinematical process of the Tangjiashan landslide and to study the induced stresses characteristics in the barrage body, DDA is employed here, and a lot of case-trial calculations have been carried out with the final shape and location of the barrage as the objective, and the representative acceleration records obtained by strong-motion observation in this earthquake as the basic conditions. It is shown that the calculation results are quite acceptable and some new knowledge about the characteristics related to the high speed landslide triggered by the strong Wenchuan earthquake have been revealed by DDA.
Analysis of Discontinuous Deformation New Developments and Applications by Guowei MA, Yingxin ZHOU