Study on the liquefaction-induced damage to structures during huge earthquakes by focusing on long time ground shaking

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420487
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Geotechnical engineering
• Research Institution: Tokyo Denki University
• Principal Investigator: YASUDA Susumu 東京電機大学, 理工学部, 教授 (90192385)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 巨大地震 / 揺動 / ライフライン / 戸建て住宅

Outline of Final Research Achievements

Problems of liquefaction damage during a huge earthquake were studied. First, a number of cyclic torsional tests with several seismic waves were conducted. The test results showed that seismic waves with long earthquake motions cause liquefaction despite their small amplitude. Next, seismic response analysis and shaking table tests were conducted. As a result, it has been shown that the long time shaking of the liquefied ground causes a kind of sloshing, which causes disconnection of the buried pipes. Finally, hearing from the residents and some analyzes showed that liquefaction damage accelerated due to the aftershocks that continue to occur after the main shock.

Free Research Field

地盤工学