Analyzes on water flow by liquefaction and development of liquefaction sensor

水液化流量分析及液化传感器的研制

• 批准号: 07555145
• 负责人: TAKADA Shiro
• 金额: $ 6.85万
• 依托单位: Kobe University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555145/
• 关键词: Liquefaction sensor; Liquefaction; Excess pore water pressure; Optimum arrangement; Neural network; Monitoring; Lateral flow; Response spectra

Present research project started just after the 1995 Hyogoken Nanbu Earthquake. Most of coastal areas of Kobe harbor were liquefied including man-made lands of Port-Island and Rokko Island due to severe ground motions. Effective liquefaction sensors had been developed before the Earthquake, more quick emegency response could have been performed. The present project has been done under the many lessons by the Earthquake. Main research results are summarized as follows :(1) Experiments and theoretical analyzes by FEM could estimate the water volume due to liquefaction.(2) Seismometers turned out to be used for liquefaction sensors by analyzing a lot of seismograms observed at liquefied ground sites during the 1995 Hyogoken Nanbu Earthquake.(3) Micro topography and ground conditions are classified depending on the possibility of liquefaction.(4) FEM analyzes clarified that the amplification of ground motions was enlarged when the liquefaction occurred deep in the ground.(5) Development of sensors is expected for measuring lateral ground flow and subsidence by liquefaction.

本研究项目是在1995年兵库县南部地震后开始的。由于剧烈的地面运动，包括港口岛和六港岛的人工陆地在内的科比港的大部分沿海地区都发生了液化。地震前已经开发出有效的液化传感器，可以进行更快速的应急反应。本项目是在地震的诸多教训下完成的。主要研究成果如下：（1）通过试验和有限元理论分析可以估算液化水量。(2)通过分析1995年兵库县南部地震液化场地的大量地震记录，发现地震仪可用作液化传感器。(3)根据液化的可能性对微地形和地面条件进行分类。(4)有限元分析表明，当液化发生在地下深处时，地震动的放大作用增大。(5)预计将开发用于测量液化引起的侧向地面流动和沉降的传感器。

项目成果

E.Zhai, M.Miyajima and M.Kitaura: "Nonlinear Amplification of Vertical Ground Motions in the 1995 Hyogoken Nambu Earthquake, Journal of Geotechnical Engineering" JSCE. No.582. 1-10 (1997)

E.Zhai、M.Miyajima 和 M.Kitaura：“1995 年兵库县南部地震中垂直地面运动的非线性放大，岩土工程杂志”JSCE。

S.Takada, J.Ueno: "Numerical Simulation for up-lifted manhole during liquefaction" Soil Dynamics and Earthquake Engineering. 115-124 (1995)

S.Takada，J.Ueno：“液化过程中提升沙井的数值模拟”土壤动力学和地震工程。

佐藤忠信: "兵庫県南部地震で発生した強震域での加速度応答スペクトルの推定" 第31回地盤工学研究発表会発表講演集. (1996)

佐藤忠信：《兵库县南部地震强震区加速度反应谱的估计》第31届岩土工程研究会议论文集（1996年）。

上野淳一: "Numerical simulation for up-lifted manhole during liquefaction" Soil Dynamics and Earthquake Engneering VII. 7. 115-123 (1995)

Junichi Ueno：“液化过程中抬升检修孔的数值模拟”土壤动力学与地震工程 VII。7. 115-123 (1995)

高田至郎: "地震動と被害特性" 土木学会誌. 80. 50〜57 (1995)

高田四郎：《地震运动和损伤特性》日本土木工程学会杂志 80. 50-57 (1995)。