Friction experiments using a large scale shaking table for the understanding of earthquake source dynamics

2015 Fiscal Year Final Research Report

• Project/Area Number: 23340131
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Solid earth and planetary physics
• Research Institution: National Research Institute for Earth Science and Disaster Prevention
• Principal Investigator: Fukuyama Eiichi 国立研究開発法人防災科学技術研究所, 観測・予測研究領域 地震・火山防災研究ユニット, 総括主任研究員 (60360369)
• Co-Investigator(Kenkyū-buntansha): KAWAKATA Hironori 立命館大学, 理工学部, 教授 (80346056)
• Co-Investigator(Renkei-kenkyūsha): MIZOGUCHI Kazuo 電力中央研究所, 地球工学研究所, 主任研究員 (50435583) ; YAMASHITA Futoshi 防災科学技術研究所, 観測予測領域 地震火山防災研究ユニット, 主任研究員 (90374165) ; TAKIZAWA Shigeru 防災科学技術研究所, 観測予測領域 地震火山防災研究ユニット, 客員研究員 (80114099)
• Project Period (FY): 2011-04-01 – 2016-03-31
• Keywords: 地震発生メカニズム / 岩石摩擦 / 大型振動台

Outline of Final Research Achievements

We constructed a friction testing apparatus for meter-scale rock specimens using a large scale shaking table facility. The obtained friction data is significantly different from those already obtained by centimeter-scale experiments. To investigate the fundamental cause of this difference, we conducted the experiments under the same condition using the same rock sample for both meter- and centimeter-scale specimens. We finally constructed a model explaining the difference. We identified from the model that spatially heterogeneous wear on the sliding surfaces cases different friction behavior.

Free Research Field

地震学