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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>INFLUENCE OF SEISMIC HISTORY ON LIQUEFACTION OF SANDS</title>
      <link>https://trid.trb.org/View/52911</link>
      <description><![CDATA[It is shown both analytically and experimentally that deposits of sand subjected to low magnitude earthquakes that are not sufficiently strong to cause liquefaction will develop an increased resistance to liquefaction in subsequent earthquakes even though they may undergo no significant change in density.  Accordingly, in order to determine the liquefaction characteristics of a sand it is necessary to perform tests on samples having the same density and structure as the in-situ material and conduct the tests, whenever possible, with the correct in-situ value of K sub 0.  The study also indicates that the standard penetration resistance (or any in-situ measure of penetration resistance) is likely to provide a reasonable index of the liquefaction characteristics of a saturated sand deposit.  Available data on field performance have been summarized to develop a correlation between penetration resistance and the cyclic stress ratio at which liquefaction has been found to occur in the field. /ASCE/]]></description>
      <pubDate>Thu, 16 Feb 1978 00:00:00 GMT</pubDate>
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      <title>AT-REST LATERAL EARTH PRESSURE OF A CONSOLIDATING CLAY</title>
      <link>https://trid.trb.org/View/52923</link>
      <description><![CDATA[It is pointed out that while the above paper reports a thorough study of the fundamental mechanism, the study also has the basic data to consider K sub 0 (t) during the process of consolidation under a particular loading increment.  Supplementing selective data on the time-dependent behavior of K sub 0 (coefficient of earth pressure at rest) will provide invaluable information in establishing the appropriate rheological behavior of the particular clay sample-formation under study.  A viscoelastic model has been considered as a first approximation to establish the time-dependent nature of K sub 0 clay formation during the geological time span.  K sub o (t) is about unity at the initial stage of slurry depesition.  Afterwards, K sub 0 (t) exhibits a low minimum value with the formation of soil skeleton during the initial stage of primary consolidation, and then reincreases and approaches equilibrium value in line with the stage of secondary consolidation.]]></description>
      <pubDate>Thu, 16 Feb 1978 00:00:00 GMT</pubDate>
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