Experimental Evaluation of Transfer Length in Pretensioned Concrete Beams Using 2,400-MPa Prestressed Strands
Publication: Journal of Structural Engineering
Volume 142, Issue 11
Abstract
Prestressed (PS) strands are widely used to develop prestressed concrete (PSC) and are stronger than other types of structural steel used in the construction industry. Because of their high strength, PS strands are more effective for use in structures than other materials. Recently, high-strength 2,400-MPa PS strands have been developed and are being considered as an alternative to conventional 1,860-MPa PS strands. However, there have been no reports of research or proposed regulations for pretensioned 2,400-MPa strands in PSC. In this study, 28 PSC beams were fabricated by using 2,400-MPa PS strands, and the transfer length of the PSC was measured. Experiments were performed to evaluate several parameters such as the compressive strength of concrete, steel–fiber volume ratio, and stirrup reinforcement along with different de-tensioning methods in order to determine their effects on the transfer length. In addition, the transfer length with the 2,400-MPa PS strands was measured and compared with the transfer length predicted by previously proposed models.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
This research was supported by a grant (13SCIPA01) from Smart Civil Infrastructure Research Program funded by Ministry of Land, Infrastructure and Transport (MOLIT) of the Korean government and Korea Agency for Infrastructure Technology Advancement(KAIA).
References
ACI (American Concrete Institute). (2014). “Building code requirements for structural concrete (ACI 318-14) and commentary.” ACI 318, Farmington Hills, MI.
Barnes, R. W., Grove, J. W., and Burns, N. H. (2003). “Experimental assessment of factors affecting transfer length.” ACI Struct. J., 100(6), 740–748.
Briere, V., Harries, K. A., Kasan, J., and Hager, C. (2013). “Dilation behavior of seven-wire prestressing strand—The Hoyer effect.” Const. Build. Mater., 40, 650–658.
BS (British Standards). (2004). “Design of concrete structures. Part 1-1: General—Common rules for building and civil engineering structures.” Eurocode 2, London.
Hoyer, E., and Friedrich, E. (1939). “Beitrag zür frage der hafspaannung in eisenbeton-bauteilen.” Beton und Eisen, 30(6), 107–110 (in German).
Kaar, P. H., LaFraugh, R. W., and Mass, M. A. (1963). “Influence of concrete strength on strand transfer length.” PCI J., 8(5), 47–67.
Kim, J. H., Moon, D. Y., Ji, G. S., and Kim, K. S. (2008). “Dynamic behavior of pretensioned concrete member during detensioning.” KSCE, 28(5), 747–756.
Kim, J. K., Seong, T. R., Jang, K. P., and Kwon, S. H. (2013). “Tensile behavior of new 2, 200 MPa and 2, 400 MPa strands according to various types of mono anchorage.” Struct. Eng. Mech., 47(3), 383–399.
Mitchell, D., Cook, W. D., Khan, A. A., and Tham, T. (1993). “Influence of high strength concrete on transfer and development length of pretensioning strand.” PCI J., 38(3), 52–66.
Oh, B. H., and Kim, E. S. (2000). “Realistic evaluation of transfer lengths in pretensioned, prestressed concrete members.” ACI Struct. J., 97(6), 821–830.
Oh, B. H., Lim, S. N., Lee, M. K., and Yoo, S. W. (2014). “Analysis and prediction of transfer length in pretensioned, prestressed concrete members.” ACI Struct. J., 111(3), 549–560.
Russell, B. W., and Burns, N. H. (1997). “Measurement of transfer lengths on pretensioned concrete elements.” J Struct. Eng., 541–549.
Steinberg, E., Beier, J. T., and Sargand, S. (2001). “Effects of sudden prestress force transfer in pretensioned concrete beams.” PCI J., 46(1), 64–75.
Zi, G., Rabczuk, T., and Wall, W. (2007). “Extended meshfree methods without branch enrichment for cohesive cracks.” Comput. Mech., 40(2), 367–382.
Zia, P., and Mostafa, T. (1977). “Development length of prestressing strands.” PCI J., 22(5), 54–65.
Information & Authors
Information
Published In
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Oct 26, 2015
Accepted: Mar 11, 2016
Published online: May 18, 2016
Discussion open until: Oct 18, 2016
Published in print: Nov 1, 2016
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.