... three-dimensional (3-D) contact detection algorithm is of vital importance in large-scale computing of discontinuous deformation analysis. The contact detection algorithm takes up a large proportion of the whole calculation time because of the increasing calculation number in three-dimensional case...

...Harmonising Rock Engineering and the Environment Qian & Zhou (eds) © 2012 Taylor & Francis Group, London, ISBN 978-0-415-80444-8 Discontinuous deformation analysis: Advances and challenges G.W. Ma School of Civil and Resource Engineering, University of Western Australia, Crawley WA, Australia...

...Harmonising Rock Engineering and the Environment Qian & Zhou (eds) © 2012 Taylor & Francis Group, London, ISBN 978-0-415-80444-8 Application of two-dimensional discontinuous deformation analysis G.H. Shi DDA Company, Belmont, California, USA ABSTRACT: In the field of practical rock engineering...

... ABSTRACT In the classical Discontinuous Deformation Analysis (DDA) the contact conditions are enforced through what is referred to as an open-close iteration scheme. The open-close iteration involves repeatedly fixing and removing the artificial springs between blocks in contact and thus falls...

... with a tension cutoff. Thereafter, to avoid possible rotation-induced material domain area change and improve the calculation efficiency, the NMM model is converted into a Discontinuous Deformation Analysis (DDA) model based on a strain and kinematic energy conservation transition technique, and the follow-up...

... ABSTRACT The Discontinuous Deformation Analysis (DDA) is introduced as a potential technique that allows a realistic incorporation of kinematics in rock slope stability analysis. A comparative study with Sarma's method is proposed to investigate the stability analysis of a classic rock slope...

... of the mountain slopes fractured along the slip zone of seismogenic fault, firstly by the fault movement, which triggered rock avalanches. The ground vibration played a minor role in the causative mechanism of rock avalanches. In this paper, the Discontinuous Deformation Analysis (DDA) is adopted to verify...

... discontinuities. Numerical methods used are Multiple Yield Model (MYM) for small deformation and Discontinuous Deformation Analysis (DDA) for large deformation. The method consists of numerical analyses based on the investigation of geographical feature, geological structure and mechanical properties of rock...

... ABSTRACT The Discontinuous deformation analysis (DDA) has been widely used to model the motions of blocky masses. A linear polynomial function often used in the DDA can ease the complex contact determination between the blocks. However, this linear displacement function generates constant...

... geklueftetem Fels. Das Verhalten und die Druckverteilungen in den unterschiedlich geneigten und gekluefteten Felsenmassen wird mit Hilfe des Discontinuous Deformation Analysis Programms (DDA) simuliert, und mit Laborversuchen verglichen. Die Resultate bestatigen, dass DDA der Gewölbewirkung im „Trapdoor...