Modification of the discontinuous deformation analysis method and its application to seismic response analysis of large underground caverns

Application of the discontinuous deformation analysis method to stress wave propagation through a one-dimensional rock mass

“…Generally, the incident wave is not given in the form of velocity time history, and the Newmark integration method used in the DDA method can be applied to transform the acceleration or displacement time history into the velocity time history. 24 Another problem need to be pay attention is the approach if DDA do the computation with damping. Since the damping can reduce the energy of the incident wave, the dynamic damage would be underestimated.…”

“…[17][18][19] Additionally, to meet the demands of specific engineering problems, researchers can expediently modify the original DDA program with an open source code. [20][21][22] The authors [23][24][25] have developed the DDA method by modifying the boundary setting and stress wave inputting. These modifications enable DDA study the stress wave propagation across the rock mass.…”

Study on the Damping of the Discontinuous Deformation Analysis Based on Two-Block Model

“…Meanwhile, the DDA method has been widely applied to the seismic response of rock masses. Zhang et al [7] investigated the seismic response analysis of large underground caverns with the modified DDA method. Zhang et al [8] studied the run-out analysis of the Daguangbao landslides subjected to near-fault multidirection earthquake forces.…”

Detection of contacts between three-dimensional polyhedral blocks for discontinuous deformation analysis

“…With continuous modifications and improvements, twodimensional (2-D) DDA has been more efficient and suitable to cover practical engineering problems of rockfall, 4-7 landslide, [8][9][10][11][12][13][14][15][16] tunneling and mining, [17][18][19][20][21] cavern and underground opening, [22][23][24][25][26][27] masonry structure, [28][29][30] fracture propagation, 31,32 rock blasting [33][34][35] and many others. [36][37][38][39][40][41][42] However, the applications of 2-D DDA are inappropriate to many practical problems because the majority of discontinuities are not always perpendicular to the cross-section of the model.…”