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

A Study on Limit State Design of Ground Structures by Dilatational Strain Energy

Research Project

Project/Area Number 08455208
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 構造工学・地震工学
Research InstitutionUniversity of Tsukuba

Principal Investigator

NISHIOKA Takashi  Institute of Engineering, University of Tsukuba Mechanics, 構造工学系, 教授 (30011141)

Co-Investigator(Kenkyū-buntansha) YAMADA Yasuo  Institute of Engineering, University of Tsukuba Mechanics, 構造工学系, 教授 (90111476)
Project Period (FY) 1996 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥4,400,000 (Direct Cost: ¥4,400,000)
Fiscal Year 1998: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1997: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1996: ¥1,900,000 (Direct Cost: ¥1,900,000)
KeywordsLimit Seismic Intensity / Ground Structures / Stability of the Ground / Mean Stress / Internal Friction Angle / Cohesion / Earthquake Reistance of the ground / Drucker-Pragar's Yield Condition / 形状弾性ひずみエネルギー / 終局限界状態 / 地盤 / トンネル / 地震 / 降伏条件 / 関連流水則 / 滑り線 / 関連流れ則 / 砂質土 / シールドトンネル
Research Abstract

The purpose of this paper is to make clear the ground stability around tunnel structures in earthquake by using dilatational elastic strain energy generated in the ground and to find proper index for earthquake resistance of the ground around tunnel structures.
In Chapter 1, the stability of earth materials under plane strain condition is discussed by using dilatational elastic strain energy When dilatational elastic strain energy in the ground reaches its maximum defined by cohesion, internal friction angle and mean stress of the ground, shear zone spreads in the ground. The direction of shear zone is decided by the dilatational angle and internal friction angle of the ground.
In Chapter 2 and 3, the earthquake resistance of the ground around the box tunnel and shield tunnel is discussed by quasi-static analysis of elasto-plastic finite element method. Limit Seismic Intensity is defined as the time when shear zone connects between ground surface and upper parts of tunnels, as the seismic intensity increases. Aocording to FEM calculation, it is shown that LSI depends on cohesion, internal friction angle and mean stress of the ground.
In Chapter 4, dynamic response calculation in earthquake shows that LSI is the good index for earthquake resistance design of the ground around structures, because DSI shows the largest intensity of the ground than in dynamic response calculation.
The Chapter 5 is the conclusion.

Report

(4 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • 1996 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] 西岡 隆: "シールドトンネルの地震時終局状態について" トンネル工学研究論文・報告集. 7. 343-348 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 吉川正治・西岡隆: "圧縮状態における地盤材料の破壊に関する研究" トンネル工学研究論文・報告集. 8. 71-78 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Takashi NISIOKA: ""Ultimate State of Shield-tunnels Under Earthquakes"" Proc.of Tunnel Eng.Vol.7. 343-348 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Masaharu KIKKAWA & Takashi NISHIOKA: ""Collapse of Earth Materials under Compression"" Proc.of Tunnel Eng.Vol.8. 71-78 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 吉川正治・西岡隆: "圧縮状態における地盤材料の破壊に関する研究" トンネル工学研究論文・報告集. 8. 71-78 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 西岡 隆: "シールドトンネルの地震時終局状態について" トンネル工学研究論文報告集. Vol.7. 343-348 (1997)

    • Related Report
      1997 Annual Research Report

URL: 

Published: 1996-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi