New structure-based model for estimating undrained shear strength
Identifieur interne : 000F31 ( Main/Exploration ); précédent : 000F30; suivant : 000F32New structure-based model for estimating undrained shear strength
Auteurs : Ozer Cinicioglu [Turquie] ; Dobroslav Znidarcic [États-Unis] ; Hon-Yim Ko [États-Unis]Source :
- Journal of geotechnical and geoenvironmental engineering [ 1090-0241 ] ; 2007.
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- Pascal (Inist)
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Abstract
This paper presents an experimental study of the strength in anisotropic clays by means of centrifuge model, cone penetration, and vane shear tests. To understand the effects of void ratio, overconsolidation ratio, and testing rate on the undrained shear strength (Su) of anisotropic Speswhite clay, a new centrifugal testing technique is designed to obtain constant overconsolidation ratio (OCR) profiles with varying void ratios (e), called the "descending gravity test." The parameters controlling the generation of peak shear strength are quantified. As a result of this function, a new material and rate-dependent surface is defined in the e-OCR-Su space, which is identified as a "structural state capacity surface" since it relates the anisotropic structure to structure inherent capacity and properties. A new function for the estimation of excess pore pressure (uex) generated by cone penetration is found. By combining the strength and pore pressure functions a new model is proposed, called the "CU model." The CU model is a structure-based model that provides reliable estimates of shear strength for in situ saturated clays using the knowledge of void and overconsolidation ratios. Finally, by combining Su-e-OCR and uex-e-OCR relationships, it estimates the void ratio and OCR profiles of anisotropic clays from piezocone penetration test results.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">New structure-based model for estimating undrained shear strength</title><author><name sortKey="Cinicioglu, Ozer" sort="Cinicioglu, Ozer" uniqKey="Cinicioglu O" first="Ozer" last="Cinicioglu">Ozer Cinicioglu</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Dept. of Civil Engineering, Bogazici Univ</s1><s2>Bebek, Istanbul, 34342</s2><s3>TUR</s3><sZ>1 aut.</sZ></inist:fA14><country>Turquie</country><wicri:noRegion>Bebek, Istanbul, 34342</wicri:noRegion></affiliation></author><author><name sortKey="Znidarcic, Dobroslav" sort="Znidarcic, Dobroslav" uniqKey="Znidarcic D" first="Dobroslav" last="Znidarcic">Dobroslav Znidarcic</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Dept. of Civil, Environmental and Architectural Engineering, Univ. of Colorado</s1><s2>Boulder, CO 80309</s2><s3>USA</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Colorado</region></placeName></affiliation></author><author><name sortKey="Ko, Hon Yim" sort="Ko, Hon Yim" uniqKey="Ko H" first="Hon-Yim" last="Ko">Hon-Yim Ko</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Dept. of Civil, Environmental and Architectural Engineering, Univ. of Colorado</s1><s2>Boulder, CO 80309</s2><s3>USA</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Colorado</region></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">08-0255282</idno><date when="2007">2007</date><idno type="stanalyst">PASCAL 08-0255282 INIST</idno><idno type="RBID">Pascal:08-0255282</idno><idno type="wicri:Area/PascalFrancis/Corpus">000281</idno><idno type="wicri:Area/PascalFrancis/Curation">000503</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000273</idno><idno type="wicri:doubleKey">1090-0241:2007:Cinicioglu O:new:structure:based</idno><idno type="wicri:Area/Main/Merge">000F44</idno><idno type="wicri:Area/Main/Curation">000F31</idno><idno type="wicri:Area/Main/Exploration">000F31</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">New structure-based model for estimating undrained shear strength</title><author><name sortKey="Cinicioglu, Ozer" sort="Cinicioglu, Ozer" uniqKey="Cinicioglu O" first="Ozer" last="Cinicioglu">Ozer Cinicioglu</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Dept. of Civil Engineering, Bogazici Univ</s1><s2>Bebek, Istanbul, 34342</s2><s3>TUR</s3><sZ>1 aut.</sZ></inist:fA14><country>Turquie</country><wicri:noRegion>Bebek, Istanbul, 34342</wicri:noRegion></affiliation></author><author><name sortKey="Znidarcic, Dobroslav" sort="Znidarcic, Dobroslav" uniqKey="Znidarcic D" first="Dobroslav" last="Znidarcic">Dobroslav Znidarcic</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Dept. of Civil, Environmental and Architectural Engineering, Univ. of Colorado</s1><s2>Boulder, CO 80309</s2><s3>USA</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Colorado</region></placeName></affiliation></author><author><name sortKey="Ko, Hon Yim" sort="Ko, Hon Yim" uniqKey="Ko H" first="Hon-Yim" last="Ko">Hon-Yim Ko</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Dept. of Civil, Environmental and Architectural Engineering, Univ. of Colorado</s1><s2>Boulder, CO 80309</s2><s3>USA</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Colorado</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Journal of geotechnical and geoenvironmental engineering</title><title level="j" type="abbreviated">J. geotech. geoenviron. eng.</title><idno type="ISSN">1090-0241</idno><imprint><date when="2007">2007</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of geotechnical and geoenvironmental engineering</title><title level="j" type="abbreviated">J. geotech. geoenviron. eng.</title><idno type="ISSN">1090-0241</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Clay</term><term>Overconsolidated soil</term><term>Penetration test</term><term>Pore pressure</term><term>Soil test</term><term>Undrained soil test</term><term>Void fraction</term><term>Water pressure</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Essai sol</term><term>Argile</term><term>Sol surconsolidé</term><term>Essai non drainé</term><term>Fraction vide</term><term>Essai pénétration</term><term>Pression eau</term><term>Pression pores</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">This paper presents an experimental study of the strength in anisotropic clays by means of centrifuge model, cone penetration, and vane shear tests. To understand the effects of void ratio, overconsolidation ratio, and testing rate on the undrained shear strength (S<sub>u</sub>) of anisotropic Speswhite clay, a new centrifugal testing technique is designed to obtain constant overconsolidation ratio (OCR) profiles with varying void ratios (e), called the "descending gravity test." The parameters controlling the generation of peak shear strength are quantified. As a result of this function, a new material and rate-dependent surface is defined in the e-OCR-S<sub>u</sub> space, which is identified as a "structural state capacity surface" since it relates the anisotropic structure to structure inherent capacity and properties. A new function for the estimation of excess pore pressure (u<sub>ex</sub>) generated by cone penetration is found. By combining the strength and pore pressure functions a new model is proposed, called the "CU model." The CU model is a structure-based model that provides reliable estimates of shear strength for in situ saturated clays using the knowledge of void and overconsolidation ratios. Finally, by combining S<sub>u</sub>-e-OCR and u<sub>ex</sub>-e-OCR relationships, it estimates the void ratio and OCR profiles of anisotropic clays from piezocone penetration test results.</div></front></TEI><affiliations><list><country><li>Turquie</li><li>États-Unis</li></country><region><li>Colorado</li></region></list><tree><country name="Turquie"><noRegion><name sortKey="Cinicioglu, Ozer" sort="Cinicioglu, Ozer" uniqKey="Cinicioglu O" first="Ozer" last="Cinicioglu">Ozer Cinicioglu</name></noRegion></country><country name="États-Unis"><region name="Colorado"><name sortKey="Znidarcic, Dobroslav" sort="Znidarcic, Dobroslav" uniqKey="Znidarcic D" first="Dobroslav" last="Znidarcic">Dobroslav Znidarcic</name></region><name sortKey="Ko, Hon Yim" sort="Ko, Hon Yim" uniqKey="Ko H" first="Hon-Yim" last="Ko">Hon-Yim Ko</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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