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dc.contributor.authorRauch, Alan F.en_US
dc.date.accessioned2014-03-14T20:21:29Z
dc.date.available2014-03-14T20:21:29Z
dc.date.issued1997-05-05en_US
dc.identifier.otheretd-219182249741411en_US
dc.identifier.urihttp://hdl.handle.net/10919/30346
dc.description.abstractIn historical, large-magnitude earthquakes, lateral spreading has been a very damaging type of ground failure. When a subsurface soil deposit liquefies, intact blocks of surficial soil can move downslope, or toward a vertical free face, even when the ground surface is nearly level. A lateral spread is defined as the mostly horizontal movement of gently sloping ground (less than 5% surface slope) due to elevated pore pressures or liquefaction in undelying, saturated soils. Here, lateral spreading is defined specifically to exclude liquefaction failures of steeper embankments and retaining walls, which can also produce lateral surface deformations. Lateral spreads commonly occur at waterfront sites underlain by saturated, recent sediments and are particularly threatening to buried utilities and transportation networks. While the occurrence of soil liquefaction and lateral spreading can be predicted at a given site, methods are needed to estimate the magnitude of the resulting deformations. In this research effort, an empirical model was developed for predicting horizontal and vertical surface displacements due to liquefaction-induced lateral spreading. The resulting model is called "EPOLLS" for Empirical Prediction Of Liquefaction-induced Lateral Spreading. Multiple linear regression analyses were used to develop model equations from a compiled database of historical lateral spreads. The complete EPOLLS model is comprised of four components: (1) Regional-EPOLLS for predicting horizontal displacements based on the seismic source and local severity of shaking, (2) Site-EPOLLS for improved predictions with the addition of data on the site topography, (3) Geotechnical-EPOLLS using additional data from soil borings at the site, and (4) Vertical-EPOLLS for predicting vertical displacements. The EPOLLS model is useful in phased liquefaction risk studies: starting with regional risk assessments and minimal site information, more precise predictions of displacements can be made with the addition of detailed site-specific data. In each component of the EPOLLS model, equations are given for predicting the average and standard deviation of displacements. Maximum displacements can be estimated using probabilities and the gamma distribution for horizontal displacements or the normal distribution for vertical displacements.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartApxa.pdfen_US
dc.relation.haspartApxb.pdfen_US
dc.relation.haspartApxc.pdfen_US
dc.relation.haspartApxd.pdfen_US
dc.relation.haspartApxe.pdfen_US
dc.relation.haspartChp01.pdfen_US
dc.relation.haspartChp02.pdfen_US
dc.relation.haspartChp03.pdfen_US
dc.relation.haspartChp04.pdfen_US
dc.relation.haspartChp05.pdfen_US
dc.relation.haspartChp06.pdfen_US
dc.relation.haspartChp07.pdfen_US
dc.relation.haspartChp08.pdfen_US
dc.relation.haspartChp09.pdfen_US
dc.relation.haspartChp10.pdfen_US
dc.relation.haspartChp11.pdfen_US
dc.relation.haspartChp12.pdfen_US
dc.relation.haspartEtd.pdfen_US
dc.relation.haspartRefer.pdfen_US
dc.relation.haspartVita.pdfen_US
dc.rightsI hereby grant to Virginia Tech or its agents the right to archive and to make available my thesis or dissertation in whole or in part in the University Libraries in all forms of media, now or hereafter known. I retain all proprietary rights, such as patent rights. I also retain the right to use in future works (such as articles or books) all or part of this thesis or dissertation.en_US
dc.subjectslope stabilityen_US
dc.subjectlifeline damageen_US
dc.subjectlateralspreadingen_US
dc.subjectground deformationen_US
dc.subjectsoil liquefactionen_US
dc.titleEPOLLS: An Empirical Method for Prediciting Surface Displacements Due to Liquefaction-Induced Lateral Spreading in Earthquakesen_US
dc.typeDissertationen_US
dc.contributor.departmentCivil Engineeringen_US
dc.description.degreePh. D.en_US
thesis.degree.namePh. D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineCivil Engineeringen_US
dc.contributor.committeechairMartin, James R. IIen_US
dc.contributor.committeememberBrandon, THomas L.en_US
dc.contributor.committeememberMitchell, James K.en_US
dc.contributor.committeememberKriz, Ronald D.en_US
dc.contributor.committeememberFilz, George M.en_US
dc.contributor.committeememberDuncan, James Michaelen_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-219182249741411/en_US
dc.date.sdate1998-07-21en_US
dc.date.rdate1998-05-05
dc.date.adate1997-05-05en_US


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