Dynamic Earthquake Rupture Simulation on Dipping Faults

倾斜断层的动态地震破裂模拟

• 批准号: 9725709
• 负责人: Ralph Archuleta
• 金额: $ 8.94万
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-01-15 至 2000-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9725709&HistoricalAwards=false
• 关键词: Dynamic; Earthquake; Rupture; Simulation; Dipping

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. ***

本研究涉及利用最先进的有限元计算机程序对地震断层的动态破裂进行研究。地震断层破裂是一种非常复杂的物理现象，是目前地震学界研究的一个活跃领域。近年来许多地震的地面运动记录强调，了解地震断层破裂动力学对于理解观测到的地面运动，特别是在倾斜滑动断层上盘上的地面运动是至关重要的。特别是在非垂直断层情况下，地震波与破裂过程之间复杂的相互作用可能会对破裂传播和由此产生的地震动产生深远的影响。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态方程可解。有限元方法将用于提高我们对受倾斜断层自由表面影响的强运动的理解，以及受建模中使用的特定摩擦定律的影响。这项研究是国家减少地震危害计划的一个组成部分。＊＊＊