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Spacing requirements of 0.7 in. (18 mm) diameter prestressing strands

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Spacing requirements of 0.7 in. (18 mm) diameter prestressing strands

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dc.contributor.author Dang, C.N. es_ES
dc.contributor.author Floyd, R.W. es_ES
dc.contributor.author Hale, W.M. es_ES
dc.contributor.author Martí Vargas, José Rocío es_ES
dc.date.accessioned 2017-05-22T10:36:16Z
dc.date.available 2017-05-22T10:36:16Z
dc.date.issued 2016
dc.identifier.issn 0887-9672
dc.identifier.uri http://hdl.handle.net/10251/81574
dc.description.abstract [EN] The use of 0.7 in. (18 mm) diameter strands for pretensioned concrete girders is advantageous when increasing the flexural capacity and extending girder spans. The current codes have no design guidelines for predicting transfer length, development length, and minimum strand spacing for this greater-diameter strand. This study measures transfer and development lengths and evaluates the applicability of using a strand spacing of 2.0 in. (51 mm) for 16 pretensioned concrete beams with 0.7 in. diameter strands. These beams were fabricated with high-strength, conventional concrete or self-consolidating concrete. The Standard Test Method for Evaluating Bond of Seven-Wire Steel Prestressing Strand (ASTM A1081) was used to quantify the strand surface conditions. The experimental results indicate that the current ACI 318-14 and AASHTO LRFD specifications overestimate the measured transfer and development lengths for the beams. Transfer and development lengths of the beams containing two strands placed at 2.0 in. spacing were equal to or slightly greater than those of the beams containing one strand. Finally, the concrete region around the strands showed no sign of cracking. es_ES
dc.description.sponsorship The authors thank Insteel Industries Inc. for providing the strands and RJ Peterman and Associates Inc. for conducting the ASTM A1081 test method for strand bond for this research. The authors thank Don Logan for providing the financial support to conduct the ASTM A1081 test method for strand bond. The authors are also thankful to Richard Deschenes Jr., Cameron Murray, Joseph Daniels III, William Phillips, Doddridge Davis, Alberto Ramirez, and Ryan Hagedorn for helping fabricate the beams at the Engineering Research Center at the University of Arkansas.
dc.language Inglés es_ES
dc.relation.ispartof PCI Journal es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Bond es_ES
dc.subject Bridge es_ES
dc.subject Development length es_ES
dc.subject High-strength concrete es_ES
dc.subject Strand es_ES
dc.subject Surface condition es_ES
dc.subject Transfer length es_ES
dc.subject.classification INGENIERIA DE LA CONSTRUCCION es_ES
dc.title Spacing requirements of 0.7 in. (18 mm) diameter prestressing strands es_ES
dc.type Artículo es_ES
dc.rights.accessRights Cerrado es_ES
dc.contributor.affiliation Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros de Caminos, Canales y Puertos - Escola Tècnica Superior d'Enginyers de Camins, Canals i Ports es_ES
dc.description.bibliographicCitation Dang, C.; Floyd, R.; Hale, W.; Martí Vargas, JR. (2016). Spacing requirements of 0.7 in. (18 mm) diameter prestressing strands. PCI Journal. 61(1):70-87. http://hdl.handle.net/10251/81574 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://www.pci.org/publications/pci_journal/2016/january/doi/spacing_requirements_of_0_7_in__(18_mm)_diameter_prestressing_strands/ es_ES
dc.description.upvformatpinicio 70 es_ES
dc.description.upvformatpfin 87 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 61 es_ES
dc.description.issue 1 es_ES
dc.relation.senia 326112 es_ES


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