A Numerical Study of Wave Propagation and Cracking Processes in Rock-Like Material under Seismic Loading Based on the Bonded-Particle Model Approach

Rockfall Susceptibility Assessment and Landscape Evolution of San Nicola Island (Tremiti Islands, Southern Adriatic Sea, Italy)

“…To better discriminate the triggering mechanisms of some of the detected landslide movements and to derive the role played by the main litho-structural and tectonic features, seismic features of San Nicola Island were taken into account. According to the geological and tectonic context of the area, seismic loading can contribute to the general slope instability, either by reducing the strength of rock masses by propagation and widening of present fractures, or by triggering rockfall and topple phenomena [80]. According to the DBMI15 v4.0 catalogue [59], indeed, San Nicola Island has suffered shaking produced by several earthquakes, starting from the XVII century and affecting both the Gargano and Southern Adriatic areas (Figure 10).…”

A hybrid finite-discrete element method for modelling cracking processes in sandy mudstone containing a single edge-flaw under cyclic dynamic loading

“…However, due to the strong nonlinear characteristics of the deformation or fracture process of jointed rock masses, it is very di cult to predict the strength and failure mode of rock masses 13 . Therefore, a better understanding of the crack initiation and growth in rock mass is helpful to the study of the mechanical mechanism of rock slope failure under seismic loading 11 .…”

“…The study of the crack initiation and growth rules of rock materials with pre-existing aws under dynamic loading has important theoretical signi cance and engineering value for revealing the macroscopic nonlinear mechanical behavior of rock fracture process under earthquake action and explaining the engineering fracture phenomenon caused by crack propagation. However, there is relatively few research on the true fracture process of rocks containing pre-existing aws under seismic loads, and resulting in an unclear understanding of it 11 . The numerical simulation of rock transition from continuous to discontinuous media under dynamic loads remains a challenge.…”

“…Hence compared to con ning pressure, the internal joints and aws in rock masses have a greater impact on the deformation, strength, and crack propagation form of the rock 7 . Then the stability of rock slopes is mainly controlled by internal joints and aws in the rock mass, and the fracture process of the rock mass can be seen as a macroscopic manifestation of crack initiation and growth [8][9][10][11][12] . The fundamental reason for the rock slope failure under earthquake is the deformation and fracture of the rock mass under external load, which is essentially the process of crack initiation and growth under seismic load.…”

“…Figure11-Fig.13not just shown the process of crack initiation, propagation and coalescence in different numerical models, but also provide the types of each microcracks (Tensile, Shear, and Mixed). This section will further analyze the fracture modes and failure mechanisms of macroscopic cracks in rock samples derived from different cases.…”