Stability evaluation of a tunnel in swelling ground by a simplified multi-scale analysis using a secant stiffness

DOI Open Access
  • LIU Xiaodong
    Department of Civil and Environmental Engineering, School of Engineering, Tohoku University
  • UNOSAWA Hitoshi
    East Nippon Expressway Company Limited
  • KATO Junji
    Department of Civil and Environmental Engineering, School of Engineering, Tohoku University
  • KYOYA Takashi
    Department of Civil and Environmental Engineering, School of Engineering, Tohoku University

Bibliographic Information

Other Title
  • 割線剛性を用いた簡便なマルチスケール解析による膨張性地山のトンネル安定性評価

Abstract

<p>The present study proposes a numerical method to evaluate mechanical influence on tunnel structures caused by severe hygroscopic expansion of the swelling clay minerals. These swelling clay minerals are often called smectite and known to degrade the stiffness of ground due to its own damage. Assuming that this specific physical material behavior can be expressed by an isotropic continuous damage model from engineering viewpoint, we develop a numerical evaluation method for soundness degree of tunnel structures based a decoupling multi-scale analysis. In this context, tunnel structures with surroundings are assumed to be the macrostructure, while material level is to be microstructure. These hierarchically nonlinear numerical analysis needs certain computational efforts. With this background, we formulate a simplified secant solution to solve the nonlinear mechanical problem with a cheap computation cost. The performance of the proposed method is verified by a series of numerical examples.</p>

Journal

Related Projects

See more

Keywords

Details 詳細情報について

  • CRID
    1390282763058990976
  • NII Article ID
    130007497442
  • DOI
    10.11421/jsces.2018.20180014
  • ISSN
    13478826
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
    • KAKEN
  • Abstract License Flag
    Disallowed

Report a problem

Back to top