Dynamic Earthquake Rupture Simulation on Dipping Faults

9725709阿克莱塔本研究利用最先进的有限元计算机程序对地震断层动态破裂进行了研究。地震断层破裂是一种非常复杂的物理现象，是当前地震界研究的一个活跃领域。近期许多地震中的地面运动记录强调，了解地震断层破裂的动力学对于理解观测到的地面运动是至关重要的，特别是在倾滑断层的上盘。特别是，在非垂直断裂的情况下，地震波与破裂过程的复杂相互作用可能会对破裂的传播和所产生的地面运动产生深刻的影响。许多研究试图建立地震断层破裂的解析或数值模型，但大多数都需要广泛的简化和近似才能使动力学方程可解。有限元方法将被用来促进我们对受倾斜断层的自由面影响的强运动的理解，以及受建模中使用的特殊摩擦定律的影响。这项研究是国家减少地震灾害计划的一部分。***

9725709 Archuleta This research involves the investigation of dynamic earthquake fault rupture by means of state-of-the-art finite element computer codes. Earthquake fault rupture is a very complex physical phenomenon that is currently an active area of study in the seismological community. Ground motion recordings during many recent earthquakes have emphasized that an understanding of the dynamics of earthquake fault rupture is crucial in understanding the observed ground motion, especially on the hanging wall of dip slip faults. In particular, in the case of non-vertical faulting, the complicated interaction between seismic waves and the rupture process may lead to profound effects in the rupture propagation and resultant ground motion. Many studies have attempted to create analytical or numerical models of earthquake fault rupture, but most have required extensive simplifications and approximations to make the dynamic equations solvable. The finite element method will be used to advance our understanding of strong motion as affected by the free surface for a dipping fault, and as affected by the particular friction law used in the modeling. This research is a component of the National Earthquake Hazard Reduction Program. ***