Conference paper Embargoed Access

A liquefaction surface to describe liquefaction phenomena in unsaturated sandy soils

Mele, Lucia; Lirer, Stefania; Flora, Alessandro


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            <foaf:name>University of Napoli Federico II</foaf:name>
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        <foaf:name>Lirer, Stefania</foaf:name>
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            <foaf:name>Guglielmo Marconi University, Rome</foaf:name>
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        <foaf:name>Flora, Alessandro</foaf:name>
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    <dct:title>A liquefaction surface to describe liquefaction phenomena in unsaturated sandy soils</dct:title>
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    <dct:description>&lt;p&gt;The energetic interpretation of liquefaction tests indicates that the behavior of unsaturated&lt;br&gt; sands can be related to the specific energy spent to liquefaction In this paper, an insight&lt;br&gt; is proposed on the role played by the two components of such a specific energy: the specific&lt;br&gt; volumetric energy to liquefaction (Ev,liq) and the specific deviatoric energy to liquefaction (Es,liq).&lt;br&gt; It is argued that Ev,liq (which is nil in saturated soils) can be considered as a state variable to&lt;br&gt; quantify the increase of cyclic resistance caused by a reduced degree of saturation, being thus&lt;br&gt; constant along a given cyclic resistance curve. Es,liq is instead related to a specific value of cyclic&lt;br&gt; resistance ratio or number of cycles at liquefaction via the value of the volumetric component. In&lt;br&gt; fact, for saturated tests (Ev,liq=0) Es,liq is constant for a fixed number of cycles at liquefaction (Nliq).&lt;br&gt; For unsaturated tests, Es,liq increases as Ev,liq increases for a given value of Nliq. The three variables&lt;br&gt; (Ev,liq, Es,liq and Nliq) define a &amp;ldquo;liquefaction surface&amp;rdquo; describing the resistance to liquefaction of&lt;br&gt; unsaturated soils.&lt;/p&gt;</dct:description>
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