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軟弱地盤上盛土の進行破壊のシミュレーション

発表形態：: 原著論文
主要業績：: 主要業績
単著・共著：: 共著
発表年月：: 2009年08月

DOI：
会議属性：: 指定なし
査読：: 有り
リンク情報：

日本語フィールド

著者：

柴　錦春、Carter, J. P. 読み: チャイ　ジンチュン、Carter, J. P.

題名：

軟弱地盤上盛土の進行破壊のシミュレーション

発表情報：

Computer and Geotechnics 巻: 36 ページ: 1024-1038

キーワード：

進行破壊、数値解析、盛土、軟弱地盤

概要：

ひずみ軟化現象をモデリングできる構成式を提案し、有限要素法解析ソフトに導入し、佐賀の有明粘土地盤上実際破壊した盛土のシミュレーションに適応した。

抄録：

英語フィールド

Author：

Chai, J.-C., Carter, J. P.

Title：

Simulation of the progressive failure of an embankment on soft soil

Announcement information:

Computer and Geotechnics Vol: 36 Page: 1024-1038

Keyword：

Progressive failure, numerical analysis, embankment, soft ground

An abstract：

A pragmatic strain-softening constitutive model, which is based on Modified Cam Clay, was applied to the simulation of the progressive failure of an embankment constructed on a deposit of sensitive (strain-softening) clay in Saga, Japan. A comparison of the predictions for this case indicates that if softening is ignored, only relatively small deflections and consolidation settlements are predicted, especially after construction. In contrast, for the case where softening is included in the analysis, progressive failure within the clay induces large shear deformations and finally failure of the embankment is predicted. This comparison suggests that softening-induced progressive failure should be considered in the design of embankments on such soils, and the residual strength of the deposit may have an important influence on the overall factor of safety of the construction. Detailed analyses of predicted excess pore water pressures, shear strains and shear stress levels in the ground indicate that considering the strain-softening process: (a) is associated with the buildup of excess pore water pressure; (b) promotes strain localization; and (c) results generally in a larger zone of soil involved in the failure.