Download PDF by Guowei MA, Yingxin ZHOU: Analysis of Discontinuous Deformation New Developments and

By Guowei MA, Yingxin ZHOU

This e-book includes the 7 keynote papers written via the specialists, overseas well known 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 evaluate technique. It represents the newest advances in numerical and analytical equipment regarding rock mechanics and engineering. Following the culture of the sequence, the most schemes of the papers are at the key block conception and its engineering purposes, the discontinuous deformation research (DDA) approach and the numerical manifold strategy (NMM). besides the fact that, different suitable themes, for instance, the distinct/discrete aspect process, the meshless procedure, the finite point process in rock mechanics and engineering purposes also are integrated. For rock plenty the place the discontinuities dominate their behaviour in a rock engineering procedure similar to rock slopes and underground rock caverns, the research of discontinuous deformation is of severe value within the balance research and engineering layout. it truly is was hoping that this e-book serves as an invaluable reference for either researchers and engineers at the new advancements and purposes of some of the to be had modeling ideas and instruments during this more and more very important box of rock mechanics and engineering. subject matters lined: * Key Block conception and Engineering functions * Discontinuous Deformation research (DDA) approach * Numerical Manifold procedure (NMM) * Distinct/Discrete aspect process (DEM) * program of UDEC, 3DEC and PFC codes * Meshless process and Rock Engineering purposes * touch Algorithms * Wave Propagation via Rock Joint and Jointed Rock Mass * Deformation research of Heterogeneous fabrics * different complicated Analytical and Numerical tools in Rock Engineering * Experimental strategies and dimension of Discontinuous Deformation * Case stories and different suitable issues

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Acknowledgements This research work is supported by the National Science Foundation of China with contract No. 50639090, and the Project of Xdc2007-10 founded by Ministry of Water and Resources of People’s Republic of China. The authors thank to Dr. Gen-hua Shi for his valuable advice in the field of DDA engineering applications. 35 Analysis of Discontinuous Deformation: New Developments and Applications References 1. Yin Yueping. Researches on the geo-hazards triggered by Wenchuan earthquake, Sichuan [J].

Its characteristic is its high adaptability in comparison with the curve of exponential function or other regression curves. 0. K of SF in Eq. (3) is designated as the revised velocity, expressing the gradient of the curve. The reflective velocity may be obtained from Eq. (4) by using the SF curve. SF = 1 1+ Vn in K (3) Vn out = Rn (scaled) × SF × Vn in (4) Vout = RV (scaled) × SF × Vin (5) On the other hand, we have clarified that the velocity ratio (Rv ) has also the dependent property on the incident velocity of the normal direction, based on the laboratory experimental results of dropping a quartz ball on the reflective plate of rock and wood.

Figure 2. Original scenery of Tangjiashan site (from upstream view). the seismic intensity was in the grade of ten to eleven. Figure 1 shows the seismic intensity distribution map of the Wenchuan earthquake. ∗ Corresponding author. com Figure 3. Spatial morphology of landslide (from downstream view). 7m Foundation rock of Qingping group in the lower Cambrian muddy siltstone by deposit Figure 4. Geological section of the landslide. Before the landslide occurred, the top elevation of the hill at the right bank of the river was about 1580 m, and the slope height was 900 m with the dip angle of 40◦ in its upper part and 30◦ in the lower part.

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