EERI Chapter Georgia Tech

Dear all,

Please join us at the second EERI Student Seminar in 2017 this Friday. Pizza and soda will be provided.

Time: 12:00 PM, Friday, October 27, 2017
Title: A new hybrid numerical scheme for modelling elastodynamics in unbounded media with near-source heterogeneities
Location: College of Computing, Room 102

Speaker: PhD Candidate, Setare Hajarolasvadi
University of Illinois at Urbana-Champaign
Civil and Environmental Engineering Dept.

Abstract: The Finite Difference (FD) and the Spectral Boundary Integral (SBI) methods have been used extensively to model spontaneously propagating shear cracks, which are useful idealizations of natural earthquakes, in a variety of engineering and geophysical applications. This talk focuses on proposing a new modelling approach, in which these two methods are combined through consistent exchange of boundary tractions and displacements. Benefiting from the flexibility of FD and the efficiency of spectral boundary integral methods, the proposed hybrid scheme will solve a wide range of problems in a computationally efficient way. We demonstrate the validity of the approach using two examples for dynamic rupture propagation: one in the presence of a low-velocity layer and another in which off-fault plasticity is permitted. We discuss possible potential uses of the hybrid scheme in earthquake cycle simulations as well as an exact absorbing boundary condition.

Bio: Setare Hajarolasvadi is currently a PhD candidate in the department of Civil and Environmental Engineering at the University of Illinois at Urbana-Champaign. She completed her Bachelor’s degree at Sharif University of Technology, Iran, and started her graduate studies at UIUC in 2014 where she joined the “Mechanics of Complex Systems” group and started working with Professor Ahmed E. Elbanna. She is also the corporate chair and a graduate adviser of the EERI student chapter at UIUC. Her research focuses on earthquake mechanics and multiscale modeling of earthquake cycles.