Grade 300 Prestressing Strand and the Effect of Vertical Casting Position

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dc.contributor.authorCarroll, James Christopheren
dc.contributor.committeecochairCousins, Thomas E.en
dc.contributor.committeecochairRoberts-Wollmann, Carin L.en
dc.contributor.committeememberSotelino, Elisa D.en
dc.contributor.committeememberWang, Linbingen
dc.contributor.departmentCivil Engineeringen
dc.date.accessioned2014-03-14T20:15:44Zen
dc.date.adate2009-09-01en
dc.date.available2014-03-14T20:15:44Zen
dc.date.issued2009-08-20en
dc.date.rdate2009-09-01en
dc.date.sdate2009-08-26en
dc.description.abstractThe purpose of this study was to investigate the influence an increase in strand strength and the effect the as-cast vertical location had on transfer length, development length, and flexural strength and to resolve the discrepancies regarding the definition of the top-bar/strand effect. Two types of test specimens were fabricated and tested investigating each respective item. The increase in strand strength was found to influence transfer length, development length, and flexural strength, while the as-cast vertical location was only found to influence transfer length, and in turn development length. Contrary to the historical definition, the top-bar/strand effect was found to be more dependent on the amount of concrete cast above the strand than the amount below it, with transfer lengths showing a steady increase with a decrease in the amount of concrete cast above the strand. As a result of the findings of this study, a new transfer length equation was proposed and a previously proposed flexural bond length equation was recommended for use in lieu of the current code provisions. The current equations for flexural strength were found to give adequate estimates for flexural strength, although a decrease in ductility was noted.en
dc.description.degreePh. D.en
dc.identifier.otheretd-08262009-190405en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-08262009-190405/en
dc.identifier.urihttp://hdl.handle.net/10919/28806en
dc.publisherVirginia Techen
dc.relation.haspartDISSERTATION.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectFlexural strengthen
dc.subjectTop-strand effecten
dc.subjectBonden
dc.subjectDevelopment lengthen
dc.subjectPrestressed concreteen
dc.subjectTransfer lengthen
dc.subjectGrade 300 stranden
dc.titleGrade 300 Prestressing Strand and the Effect of Vertical Casting Positionen
dc.typeDissertationen
thesis.degree.disciplineCivil Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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