Three Dimensional Stress Drop Models for Slip Zones in the Earth's Crust

地壳滑移带的三维应力降模型

• 批准号: 9105467
• 负责人: John Rudnicki
• 金额: $ 15.3万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-09-01 至 1994-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9105467&HistoricalAwards=false
• 关键词: Three; Dimensional; Stress; Drop; Models

This research applies an accurate and efficient method for analyzing cracks in a three-dimensional elastic half-space to the study of slip zones in the earth's crust. Previous studies are extended to consider the effects of non-uniform stress drop, segmented faults, and coupling of normal and shear stresses due to near-surface slip and non-planar slip zones and advance of slip zones. In addition, calculations are done to determine stresses and surface deformations due to the advance of shear faults into and around locked, or more resistant, portions of the shallow crust. The goal of these studies is to understand better the mechanics of earthquake slip and, in particular, conditions that control the initiation and termination of earthquake ruptures. This research is a component of the National Earthquake Hazard Reduction Program.

本研究将一种准确、高效的三维弹性半空间裂纹分析方法应用于地壳滑移带的研究。 先前的研究扩展到考虑非均匀应力降、分段断层以及由于近地表滑移和非平面滑移区以及滑移区前进而导致的法向应力和剪应力耦合的影响。 此外，还进行计算以确定由于剪切断层推进到浅地壳的锁定部分或更具抵抗力的部分及其周围而产生的应力和表面变形。 这些研究的目的是更好地了解地震滑动的力学，特别是控制地震破裂的起始和终止的条件。 这项研究是国家地震减灾计划的一部分。