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Home  >  Journal list  >  Journal of the Society of Materials Science, Japan  >  Vol.55  No.5 (2006)  >  pp.507-514

Journal of the Society of Materials Science, Japan
<<Previous article Vol.55  No.5 (2006)   pp.507 - 514 Next article>>

On the Possibility of Identifying Nonlinear Constitutive Laws by Back Analysis

Shinichi AKUTAGAWA1), Akiko HASEGAWA2), Ryo YAMASHITA3), Kunifumi TAKEUCHI4), Jaeho LEE5) and Shunsuke SAKURAI6)
1) Dept. of Architecture and Civil Eng., Kobe Univ.
2) Mori Build. Corporation
3) Osaka City Office
4) Obayashi Corporation
5) Kobe Univ.
6) Construction Eng. Res. Inst.


Back analysis of a ground deformational behavior involving nonlinear behavior is discussed. It is of primary importance to make reliable prediction of deformational behavior for shallow tunnels in soft ground. However, predictions made often prove to be incorrect due to complexity of constitutive law and other relevant factors. Back analysis therefore becomes more important, for it may be used to interpret measured displacement to derive non-linear material characteristics. The paper shows some example in which a deformational mechanism is studied in the light of inhomogeneous distribution of Young's module, from which a logic is derived to identify two different types of non-linear constitutive relationships.


Keyword:
Tunnel, Back analysis, Nonlinear problems, Strain softening behavior

Received: August 09, 2005
Published online: June 03, 2006
Copyright (c) 2006 by The Society of Materials Science, Japan

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