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MS, Structural Engineering, 2009, Tianjin University, China
California Institute of Technology
1200 E. California Blvd., MS 252-21
So. Mudd Building, Rm 364
Pasadena, CA 91125
Fax: (626) 564-0715
Having a background in structural engineering, I am particularly interested in earthquakes that can cause severe damage to buildings. I am currently investigating two kinds of devastating effects of earthquakes: 1) the high-frequency source components and 2) the megathrusts:
1) We find that around most mature faults, the damaged fault zone structures can induce pulse-like rupture and high-frequency ground motions, which are hazardous for short-story buildings. We are studying how the trapped waves inside the damaged structure are related to the induced effects on earthquake ruptures.
2) The 2011 Tohoku-Oki earthquake (Mw9.0) is unexpected in terms of anomalous slip in the shallower region and high-frequency radiation in the deeper region. We present observation-based dynamic rupture model that can explain the frequency-dependent rupture process. We also present how the stress drop and fracture energy of the earthquake can be constrained by our models. We find the subduction wedge contributes to the up-dip rupture and resulted large slip, which may affect other megathrust earthquakes as well.