Development of an experimental system for analyzing the rheology of dense granular materials and fault gouge under seismic conditions

地震条件下致密颗粒材料和断层泥流变分析实验系统的开发

• 批准号: 0732715
• 负责人: Ze'ev Reches
• 金额: $ 24.38万
• 依托单位: University of Oklahoma Norman Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-01-15 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0732715&HistoricalAwards=false
• 关键词: Development; experimental; system; analyzing; rheology

0732715RechesThis grant supports a two year collaborative effort to develop a rotary shear device for studying the rheology of dense granular materials and fault gouge under earthquake conditions. In order to simultaneously subject materials to large slip, fluid confinement, elevated pore pressure, high slip velocity, and high normal stress, the device will combine a commercially available loading and monitoring device together with a PI developed sealed annular cell that will contain the granular material and allow loading under in situ seismic conditions and a servo-controlled hydraulic system that is capable of continuous, monotonous change of slip velocity. Components of the instrument will be assembled at the University of Oklahoma though the final instrument will be housed and maintained at the USGS in Menlo Park, CA. If successful, the device is anticipated to produce novel experimental data that may lead to advances in our understanding of earthquake rupture mechanics.***

0732715研究经费支持一项为期两年的合作项目，开发一种旋转剪切装置，用于研究地震条件下致密颗粒材料和断层泥的流变学。为了同时使材料承受大滑移、流体约束、高孔隙压力、高滑移速度和高法向应力，该设备将结合商用加载和监测设备以及PI开发的密封环形单元，该单元将包含颗粒材料，并允许在原位地震条件下加载，以及能够连续、单调地改变滑移速度的伺服控制液压系统。仪器的组件将在俄克拉何马大学组装，但最终仪器将被安置在加利福尼亚州门洛帕克的美国地质勘探局进行维护。如果成功，该设备有望产生新的实验数据，这可能会导致我们对地震破裂力学的理解取得进展