Investigation of Transfer Length, Development Length, Flexural Strength, and Prestress Losses in Lightweight Prestressed Concrete Girder

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dc.contributorVirginia Transportation Research Councilen
dc.contributorVirginia Techen
dc.contributor.authorCousins, Thomas E.en
dc.contributor.authorNassar, Adilen
dc.contributor.departmentCivil and Environmental Engineeringen
dc.date.accessed2013-11-21en
dc.date.accessioned2014-03-19T18:30:21Zen
dc.date.available2014-03-19T18:30:21Zen
dc.date.issued2003-04-01en
dc.description.abstractEncouraged by the performance of high performance normal weight composite girders, the Virginia Department of Transportation has sought to exploit the use of high performance lightweight composite concrete (HPLWC) girders to achieve economies brought about by the reduction of dead loads in bridges. Transfer length measurements (conducted on two AASHTO Type IV HPLWC prestressed girders) indicated an average transfer length of 17 inches, well below the AASHTO and ACI requirements. Two HPLWC AASHTO Type II girders and a 48 x 8 inch normal weight 4000-psi concrete deck were fabricated. The girders were cast of concretes with a compressive strength of 6380 psi and a unit weight of 114 pcf. Full scale testing of the girders was conducted to evaluate development length and flexural strength in HPLWC composite girders. Embedment lengths of five, six, and eight feet were evaluated. Tests indicated a development length of about 72 inches, marginally below the ACI and AASHTO requirements. All tested girders exceeded their theoretical flexural capacity by 24% to 30%. A third composite Type II girder was cast of high performance normal weight concrete and topped with a 48 x 8 inch normal weight 4000-psi concrete deck. This girder was intended as a control specimen. Prestress losses in the HPLWC AASHTO Type IV girders monitored over a nine-month period were found to be less than those calculated using the ACI and PCI models.en
dc.description.sponsorshipVirginia Department of Transportation 56804en
dc.description.sponsorshipFHWA 56804en
dc.format.extent44 pagesen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationThomas E. Cousins and Adil Nassar. "Investigation of Transfer Length, Development Length, Flexural Strength, and Prestress Losses in Lightweight Prestressed Concrete Girders," Virginia Transportation Research Council 530 Edgemont Road Charlottesville, VA 22903, Report No. FHWA/VTRC 03-CR20, April 2003.en
dc.identifier.govdocFHWA/VTRC 03-CR20en
dc.identifier.urihttp://hdl.handle.net/10919/46706en
dc.identifier.urlhttp://www.virginiadot.org/vtrc/main/online_reports/pdf/03-cr20.pdfen
dc.language.isoen_USen
dc.publisherVirginia Center for Transportation Innovation and Researchen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectHigh performance concreteen
dc.subjectLightweight concreteen
dc.subjectLow-permeability concreteen
dc.subjectPrestressed concrete bridge girdersen
dc.subjectStructural testingen
dc.subjectTransfer lengthen
dc.subjectDevelopment lengthen
dc.subjectFlexural strengthen
dc.titleInvestigation of Transfer Length, Development Length, Flexural Strength, and Prestress Losses in Lightweight Prestressed Concrete Girderen
dc.typeTechnical reporten
dc.type.dcmitypeTexten

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