Modeling earthquakes with off-fault damage using the combined finite-discrete element method

Autor: Esteban Rougier, Kurama Okubo, Harsha S. Bhat, Zhou Lei
Rok vydání: 2020
Předmět:
Field (physics)
0211 other engineering and technologies
Computational Mechanics
FOS: Physical sciences
Hardware_PERFORMANCEANDRELIABILITY
02 engineering and technology
Fault (geology)
01 natural sciences
Physics::Geophysics
Physics - Geophysics
Computer Science::Hardware Architecture
Earthquake rupture
0101 mathematics
Computer Science::Operating Systems
Computer Science::Distributed
Parallel
and Cluster Computing
021101 geological & geomatics engineering
Civil and Structural Engineering
Stress concentration
Fluid Flow and Transfer Processes
Numerical Analysis
geography
geography.geographical_feature_category
Deformation (mechanics)
Crust
Discrete element method
Geophysics (physics.geo-ph)
010101 applied mathematics
Computational Mathematics
Modeling and Simulation
Fracture (geology)
Geology
Seismology
Zdroj: Computational Particle Mechanics. 7:1057-1072
ISSN: 2196-4386
2196-4378
Popis: When a dynamic earthquake rupture propagates on a fault in the Earth's crust, the medium around the fault is dynamically damaged due to stress concentrations around the rupture tip. Recent field observations, laboratory experiments and canonical numerical models show the coseismic off-fault damage is essential to describe the coseismic off-fault deformation, rupture dynamics, radiation and overall energy budget. However, the numerical modeling of "localized" off-fault fractures remains a challenge mainly because of computational limitations and model formulation shortcomings. We thus developed a numerical framework for modeling coseismic off-fault fracture networks using the combined finite-discrete element method (FDEM) and we applied it to simulate dynamic ruptures with coseismic off-fault damage on various fault configurations. This paper addresses the role of coseismic off-fault damage on rupture dynamics associated with a planar fault, as a base case, and with a number of first-order geometrical complexities, such as fault kink, step-over and roughness.
Comment: arXiv admin note: text overlap with arXiv:1901.01771
Databáze: OpenAIRE
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