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https://hdl.handle.net/20.500.14094/90007726
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2024-04-20
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90007726 (fulltext)
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メタデータID
90007726
アクセス権
open access
出版タイプ
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タイトル
Practical method to estimate parameters of elasto-plastic constitutive model for unsaturated soils from compaction curve
著者
Tachibana, Shinya ; Matsumoto, Masayoshi ; Iizuka, Atsushi
著者ID
A0089
研究者ID
1000090432567
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=aec50f4adaf6f97a520e17560c007669
著者名
Tachibana, Shinya
橘, 伸也
タチバナ, シンヤ
所属機関名
都市安全研究センター
著者名
Matsumoto, Masayoshi
著者ID
A0403
研究者ID
1000040184361
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=0377c7775de5d912520e17560c007669
著者名
Iizuka, Atsushi
飯塚, 敦
イイヅカ, アツシ
所属機関名
都市安全研究センター
収録物名
Soils and Foundations
巻(号)
60(5)
ページ
1287-1298
出版者
Elsevier B.V.
刊行日
2020-10
公開日
2021-01-08
抄録
The input parameters for the hardening law for the elasto-plastic constitutive model of unsaturated soils are generally fitting parameters that control the degree of hardening response and cannot easily be determined without the results of experimental tests in which the changes in suction, water content, and volume are measured or controlled. However, it is next to impossible to complete such precise experimental tests on all the geomaterials comprising the earth structure to be analysed, such as an embankment. It is important, therefore, to establish a method for determining these parameters from more easily attainable data on the material. This paper presents a practical method for estimating the input parameters related to hardening/softening due to desaturation/saturation in the elasto-plastic constitutive model proposed by Ohno et al. (2007a) from a compaction curve, which is frequently obtained and widely used in engineering practice. In the proposed method, the input parameters are estimated by simultaneously solving three theoretical equations, each of which holds for a different point, indicating the statically compacted state on the dry side of the compaction curve, while the approximately represented compaction curve is used instead of a hand-drawn one. The paper demonstrates that the proposed method enables the estimation of the input parameter values within a range small enough so as not to affect the results of the simulation, irrespective of the way in which the points on the represented compaction curve are selected. The validity of the estimated parameters is verified and then discussed through a series of static compaction test simulations.
キーワード
Unsaturated soils
Compaction curve
Elasto-plastic constitutive equation
Hardening law
カテゴリ
都市安全研究センター
学術雑誌論文
権利
© 2020 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society.
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/BY-NC-ND/4.0/).
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資源タイプ
journal article
言語
English (英語)
ISSN
0038-0806
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NCID
AA00700879
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関連情報
DOI
https://doi.org/10.1016/j.sandf.2020.08.005
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