HR: 1340h
AN: S53A-1075    [Abstracts]
TI: A Hybrid Boundary Integral Equation and Domain Finite Element Method for Dynamic Rupture in Heterogeneous Media: Antiplane Case
AU: * Goto, H
EM: goto@catfish.dpri.kyoto-u.ac.jp
AF: Disaster Prevention Research Institute, Kyoto University, Gokasho, Uji, Kyoto, 611-0011 Japan
AU: Ramirez-Guzman, L
EM: lramirez@andrew.cmu.edu
AF: Civil and Environmental Engineering, Carnegie Mellon University, 5000 Forbes Ave., Pittsburgh, PA 15213-3890 United States
AU: Bielak, J
EM: jbielak@andrew.cmu.edu
AF: Civil and Environmental Engineering, Carnegie Mellon University, 5000 Forbes Ave., Pittsburgh, PA 15213-3890 United States
AB: In recent years, dynamic source models have been increasingly used to represent the rupture propagation process during earthquakes. Several numerical approaches, such as the finite difference and the finite element methods, have been proposed for dynamic rupture modeling. These techniques, however, do not represent accurately stress fields close to the slip area, due to the presence of singularities at tips and edges. In practice, they can also have difficulty representing faults of arbitrary shape. The boundary integral equation method, on the other hand, can represent correctly the singular stress fields within the slip area and can deal with faults of arbitrary shape, but cannot be readily applied to complex media with heterogeneous materials and arbitrary geometries. In this study, we propose a new hybrid approach that combines the advantages of the boundary integral equation method and the domain finite element method. The formulation is presented in detail for the SH-wave problem, and is illustrated by several examples involving oblique faults in a highly heterogeneous half space with an irregular free surface.
DE: 7209 Earthquake dynamics (1242)
SC: Seismology [S]
MN: Fall Meeting 2005