Spontaneous Rupture Sequences on Non-Planar Elastodynamic Faults: The Interaction of Geometrical Heterogeneities and Stress Heterogeneities and the Observable Consequences

非平面弹性动力断层的自发破裂序列：几何异质性和应力异质性的相互作用以及可观察到的后果

• 批准号: 0229834
• 负责人: Bruce Shaw
• 金额: $ 11.37万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-01-01 至 2004-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0229834&HistoricalAwards=false
• 关键词: Spontaneous; Rupture; Sequences; Non; Planar

ShawEAR-0229834Geometrical and material heterogeneities in faults have long been viewed as a crucial feature affecting earthquake behavior. More recently, the role of stress heterogeneities has begun to be recognized as a potentially central feature, particularly with the demonstration that stress heterogeneities alone already can produce a remarkably rich and complex set of earthquake-like behaviors on uniform planar faults. What is missing is an understanding of how the two types of heterogeneities, the static geometrical and material heterogeneities, and the dynamic stress heterogeneities, might combine and interact to produce even more realistic behavior. Building from earlier work in which we successfully integrated physical models of complex fault systems with the elastodynmics of repeating events, we are working to continue this line of research of the interaction of geometrical and dynamical heterogeneities. We are working to both further develop the theory, by further developing the modeling capability to extend from the scalar to the tensor case, and to further develop our ability to test the theory, by exploring the observable consequences.

断层的几何和物质不均匀性长期以来一直被视为影响地震行为的重要特征。 最近，应力不均匀性的作用已经开始被认为是一个潜在的中心特征，特别是随着应力不均匀性本身已经可以在均匀平面断层上产生一组非常丰富和复杂的类似地震的行为的证明。 所缺少的是理解两种类型的不均匀性，静态几何和材料不均匀性，以及动态应力不均匀性，如何联合收割机结合并相互作用以产生更真实的行为。从早期的工作中，我们成功地集成了复杂的故障系统与重复事件的弹性力学的物理模型的建设，我们正在努力继续这条线的几何和动力学的不均匀性的相互作用的研究。我们正在努力进一步发展理论，通过进一步发展从标量扩展到张量情况的建模能力，并通过探索可观察到的后果进一步发展我们测试理论的能力。