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タイトルヨミ
ジバン カイセキ ニ ミル ブンキ ガイネン ト ヒ キョウジクセイ オ コウリョシタ コウセイ ホウテイシキ ノ コウガクテキ イギ
日本語以外のタイトル
Bifurcation Concept in Geotechnical Analysis and the Technological Significance of a Non-coaxial Constitutive Equation of Clay
ファイル
言語
日本語
著者
亀井 健史
内容記述(抄録等)
This paper describes bifurcation concept in geotechnical analysis and the technological significance of a non-coaxial constitutive equation of clay.
In unconfined compression tests, deformation of specimen is uniform in the early stage of loading. Deformation changes from uniform deformation to non-uniform deformation near maximum load. As that time localization of strain leads to failure of specimens through formation of shear bands. Therefore, signs of failure appear before destruction. Bifurcation analysis gives the bifurcation stress ratio, i.e., stress ratio at the onset of non-uniform deformation. Design and construction of civil engineering works using bifurcation stress ratio is safer than using stress ratio at failure.
By incorporating non-coaxiality into the clay model, Both current stresses and current stress rates influence plastic strain. Consequently, clays become easy to simple-shear. Bifurcation stress ratios became small when the clay model incorporating non-coaxiality was used for bifurcation analysis to model deformation of clay under plane strain undrained loading. Deformation analysis which models construction of earthfill on the soft ground using the clay model demonstrates clear transition from localized strain to fomation of shear bands.
掲載誌名
島根大学総合理工学部紀要. シリーズA
36
開始ページ
51
終了ページ
60
ISSN
13427113
発行日
2002-12-24
NCID
AA11157087
出版者
島根大学総合理工学部
出版者別表記
Interdisciplinary Faculty of Science and Engineering, Shimane University
資料タイプ
紀要論文
ファイル形式
PDF
著者版/出版社版
出版社版
業績ID
e18682
部局
(旧組織)大学院総合理工学研究科
備考
30-41+ / 1997-2007
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