• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Fandamental Study on Liguefaction and Laterel Spread by LAT exporiments and Numerical Simulations

Research Project

Project/Area Number 13650535
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Geotechnical engineering
Research InstitutionUniversity of Tsukuba

Principal Investigator

YAMADA Yasuo  Institute of Engineering Mechanics and Systems, Professor, 機能工学系, 教授 (90111476)

Co-Investigator(Kenkyū-buntansha) MATSUSHIMA Takashi  Institute of Eng. Mech. And Systems, Associate Professor, 機能工学系, 助教授 (60251625)
Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2002: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 2001: ¥1,700,000 (Direct Cost: ¥1,700,000)
KeywordsLiguefaction / Lateral Spread due to Liguefaction / experiment for visualzation / Discrete Element Method / Micromechanies / LAT(Laser-Aided Tomography) / 平面ひずみ試験 / 流動化 / 剛性回復 / 粒状体
Research Abstract

Since the 1995 Hyogoken-Nanbu earthquake it has been widely recognized that liquefaction-induced lateral spreading may cause severe damage to facilities located in urban coastal areas in Japan. However its mechanism is still unclear because the behavior of liquefied soil is essentially complicated, being controlled by the microscopic behavior of soil particles and the pore water. This research aims to develop both experimental and numerical tools to observe such microscopic behavior of liquefied soils for studying in detail the mechanism of liquefaction-induced lateral spreading.
The experimental study consists of three programs. First, a series of hollow-cylindrical torsional shear tests on Toyoura sand was performed under various drainage and loading conditions to show the importance of recovery of shear resistance of liquefied sand. Secondly, a plane-strain compression apparatus, LAT/PSC, was newly developed for visualizing the interior of the specimen using Laser-Aided Tomography technique. Monotonic loading tests using this device brought successfully both macroscopic and microscopic information during shear deformation. Thirdly, visualization of pore fluid motion was attempted by using PIV technique. The combination of LAT and PIV allows us to obtain the information on particle-pore fluid interaction which is essential in liquefaction phenomena.
Meanwhile, a series of Discrete Element simulations was also conducted to understand well the deformation mechanism of liquefied sand. Simulations of cyclic simple shear tests under constant volume condition showed that the distributions of both actual and potential contact points characterized the recovery of shear resistance. This implies the necessity for including the evolution law of such contact points in the development of constitutive equation for liquefied sand.

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] 岩田直泰ほか: "液状化による側方流動時の剛性回復特性とその評価"第36回地盤工学研究発表会概要集. 1999-2000 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 坪川洋友ほか: "LATによる粒状体内部構造評価とその精度"土木学会第57回年次学術講演会講演概要集. III. 1369-1370 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 松本優明ほか: "液状化に伴う側方流動の個別要素法シミュレーション"土木学会第57回年次学術講演会講演概要集. III. 947-948 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 岩田直泰ほか: "液状化流動地盤の間隙水圧消散特性及び側方変形特性評価"土木学会第57回年次学術講演会講演概要集. III. 1163-1164 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 松本優明ほか: "液状化に伴う流動におけるミクロ構造の個別要素法解析"第38回地盤工学研究発表会概要集. (未定). (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Iwata, N,, Matsumoto, H., Matsushima, T., Yamada, Y.: "Estimation of recovery of shear resistance of liquefied soil (in Japanese)"37th annual conference of Japanese Geotechnical Society. 1999-2000 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Tsubokawa, Y., Saomoto, H., Matsushima, T., Yamada, Y.: "Observation and quantification of 3-D granular fabric by LAT (in Japanese)"57th annual conference of Japanese Society of Civil Engineers. III. 1369-1370 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Matsumoto, H., Iwata, N., Matsushima, T., Yamada, Y.: "DEM simulation of earthquake-induced lateral spread in element test (in Japanese)"57th annual conference of Japanese Society of Civil Engineers. III. 947-948 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Iwata, N., Matsumoto, H., Matsushima, T., Yamada, Y.: "Dissipation of excess pore water pressure and lateral displacement of liquefied sand (in Japanese)"57th annual conference of Japanese Society of Civil Engineers. III. 1163-1164 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Matsumoto, H., Saomoto, H., Matsushima, T., Yamada,: "Y. DEM simulation of granular fabric change due to liquefaction-induced lateral flow (in Japanese)"38th annual conference of Japanese Geotechnical Society. in printing. (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Matsushima, T., Saomoto, H.: "Discrete Element Modeling for Irregularly-shaped Sand Grains"Proc. NUMGE2002 : Numerical Methods in Geotechnical Engineering. 239-246 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 岩田直康 ほか: "液状化による側方流動時の剛性回復特性とその評価"第37回地盤工学研究発表会概要集. 1999-2000 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 坪川洋友 ほか: "LATによる粒状体内部構造評価とその精度"土木学会第57回年次学術講演会講演概要集. III. 1369-1370 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 松本優明 ほか: "液状化に伴う側方流動の個別要素法シミュレーション"土木学会第57回年次学術講演会講演概要集. III. 947-948 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 岩田直泰 ほか: "液状流動化地盤の間隙水圧消散特性及び側方変形特性評価"土木学会第57回年次学術講演会講演概要集. III. 1163-1164 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 松本優明 ほか: "液状化に伴う流動におけるミクロ構造の個別要素法解析"第38回地盤工学研究発表会概要集. (未定). (2003)

    • Related Report
      2002 Annual Research Report

URL: 

Published: 2001-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi