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A liquefaction surface to describe liquefaction phenomena in unsaturated sandy soils

Mele, Lucia; Lirer, Stefania; Flora, Alessandro

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  <identifier identifierType="DOI">10.5281/zenodo.3463558</identifier>
      <creatorName>Mele, Lucia</creatorName>
      <affiliation>University of Napoli Federico II</affiliation>
      <creatorName>Lirer, Stefania</creatorName>
      <affiliation>Guglielmo Marconi University, Rome</affiliation>
      <creatorName>Flora, Alessandro</creatorName>
      <affiliation>University of Napoli Federico II</affiliation>
    <title>A liquefaction surface to describe liquefaction phenomena in unsaturated sandy soils</title>
    <date dateType="Issued">2019-07-19</date>
  <resourceType resourceTypeGeneral="Text">Conference paper</resourceType>
    <alternateIdentifier alternateIdentifierType="url"></alternateIdentifier>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsVersionOf">10.5281/zenodo.3463557</relatedIdentifier>
    <rights rightsURI="">Creative Commons Attribution 1.0 Generic</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
    <description descriptionType="Abstract">&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;</description>
      <funderName>European Commission</funderName>
      <funderIdentifier funderIdentifierType="Crossref Funder ID">10.13039/501100000780</funderIdentifier>
      <awardNumber awardURI="info:eu-repo/grantAgreement/EC/H2020/700748/">700748</awardNumber>
      <awardTitle>Assessment and mitigation of liquefaction potential across Europe: a holistic approach to protect structures / infrastructures for improved resilience to earthquake-induced liquefaction disasters</awardTitle>
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