A Practical Method of Multi-dimensional Risk Evaluation for Soil Liquefaction Based on Microtremor Survey and Geological Information

2016 Fiscal Year Final Research Report

• Project/Area Number: 26289196
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Building structures/Materials
• Research Institution: Building Research Institute (2016); National Institute for Land and Infrastructure Management (2014-2015)
• Principal Investigator: Arai Hiroshi 国立研究開発法人建築研究所, 構造研究グループ, 主任研究員 (40302947)
• Co-Investigator(Renkei-kenkyūsha): HAYASHI Yasuhiro 京都大学, 工学研究科, 教授 (70324704)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 簡易液状化解析 / 水平地盤変位 / 建物地震荷重 / 微動H/Vスペクトル / 逆解析 / S波速度構造 / 多次元的地震リスク評価

Outline of Final Research Achievements

A practical method estimating both acceleration response characteristics and lateral displacement of liquefied ground is proposed for aseismic design of buildings with pile foundations, which mainly consists of the one-dimensional equivalent-linear dynamic response analysis with the shear modulus ratio inferred by the adjusted N-value from the standard penetration test. The accuracy and reliability of the proposed method are revealed through the strong motion simulations using the geological information and S-wave velocity profiles estimated from microtremor surveys at the liquefied sites during the past earthquakes.

Free Research Field

建築基礎構造・地盤地震工学