... Discontinuous Deformation Analysis (3D DDA). The original DDA developed by Shi [1] is a two- dimensional (2D) numerical model for the statics and dynamics of discontinuous block systems. With many people contributing to its development and application, 2D DDA is well developed in terms of both theory...

... greatly affect the stability of a jointed rock mass. While traditional limit equilibrium methods typically do not adequately incorporate kinematics, the Discontinuous Deformation Analysis (DDA) method actually models the kinematics of motion along discontinuities. Analysis of the "two block sliding...

... discontinuous deformation analysis (DDA) technique to rock fall simulations. In order to make the method meet the practical requirements, the original DDA has been improved in the following aspects: 1). reducing error from large rigid body rotation; 2). considering damping effect due to resistance in the air...

... contact interaction and friction resistance between the pile and the vicinity of soil or gravel, static and dynamic discontinuous numerical models are needed to analyze this problem. In this paper discontinuous deformation analysis with finite element mesh in each block is used to model the simulation...

... ABSTRACT : This paper presents a simplified formulation of 2D solid-fluid interactions using the concept of Shis manifold method, which separates mathematical mesh from physical mesh. Solid blocks are formulated mainly according to Shis discontinuous deformation analysis. The mathematical...

... ABSTRACT ABSTRACT: This paper presents two extensions to the Discontinuous Deformation Analysis (DDA) method originally proposed by Shi for modeling the response of blocky rock masses to mechanical loading. First, a sub-blocking capability is presented whereby blocks are discretized into sub...

...). The author would like to thank Mr. Jerry Rule and Dr. Don Banks for their helps. REFERENCES Shi, Gen-hua 1993. Block system modeling Southampton UK and Boston USA 595 discontinuous deformation analysis. t> L>. Figure 1. The penetration of a missile at a velocity of 300 meters per second into a blocky rock...

... ABSTRACT ABSTRACT: This paper presents new capabilities of the discontinuous deformation analysis (DDA) when combined with "the artificial joint concept". These capabilities refine the determination of the refined stress distribution and permit simulating fracture propagation in intact blocks...

... ABSTRACT ABSTRACT: The Discontinuous Deformation Analysis (DDA) is a numerical model for analyzing the mechanics of discontinuous, jointed rock systems. One application of the DDA method is to use the method to evaluate the behavior of tunnel openings in jointed rocks stabilized with rock...

.... remediation displacement Reservoir Characterization siphon rock slope remediation project universal distinct element code Belden Siphon land reclamation discrete element modeling discontinuous deformation analysis Anchor verification limit equilibrium analysis failure mechanism stiffness...

... ABSTRACT ABSTRACT: A penstock rock slope was analyzed by two methods of stability analysis. They are a limiting equilibrium analysis initially developed by Goodman and Bray, and Discontinuous Deformation Analysis (DDA). Because the latter needs no assumption of a failure mode, and takes...