Development of Efficient Anchorage Device and Estimation of Its Bearing Strength of Posttensioning Anchorage Zone
Publication: Journal of Structural Engineering
Volume 144, Issue 3
Abstract
The posttensioning anchorage system of prestressed concrete consists of an anchorage device and lateral reinforcements for the enhancement of the concrete surrounding the anchorage device. In this paper, experimental and analytical studies were conducted in order to develop an efficient anchorage device and to design an equation of the bearing strength in the posttensioning anchorage zone. Eighteen load transfer specimens were tested, and the results were compared with the AASHTO and National Cooperative Highway Research Program (NCHRP) equations to investigate how they estimated the ultimate resisting capacity of the anchorage zone. The finite-element model for the numerical analyses was verified by comparison with the test results. Three-dimensional nonlinear analyses were carried out for the three design variables: (1) the location, (2) the length, and (3) the number of ribs used to evaluate the effect of each variable on the bearing strength. The best efficiency of the anchorage device was shown when a rib was placed at the opposite end of the bearing plate or when two ribs were evenly placed over the anchorage device. From the results of the parametric studies, the modified bearing capacity equation that implied the effect of additional transverse ribs was suggested.
Get full access to this article
View all available purchase options and get full access to this article.
References
AASHTO. (2002). Standard specifications for highway bridges, 17th Ed., Washington, DC.
AASHTO. (2014). AASHTO LRFD bridge design specifications, 7th Ed., Washington, DC.
Abaqus [Computer software]. Dassault Systèmes, Waltham, MA.
ACI (American Concrete Institute). (2014). “Building code requirements for structural concrete and commentary.” ACI 318-14, Farmington Hills, MI.
Breen, J. E. (1994). “Anchorage zone reinforcement for post-tensioned concrete girder.”, Transportation Research Board, Washington, DC.
Cervenka, V., and Ganz, H. R. (2014). “Validation of post-tensioning anchorage zones by laboratory testing and numerical simulation.” Struct. Concr., 15(2), 258–268.
Dassault Systèmes. (2011). “Abaqus 6.11 user’s manual.” Dassault Systèmes, Waltham, MA.
EOTA (European Organization for Technical Approvals). (2002). “Guideline for European technical approval of post-tensioning kits for prestressing of structures.”, Brussels, Belgium.
Kwak, H.-G., and Kim, D.-Y. (2006). “Cracking behavior of RC panels subject to biaxial tensile stresses.” Comput. Struct., 84(5–6), 305–317.
Lee, J., and Fenves, G. L. (1998). “Plastic-damage model for cyclic loading of concrete structures.” J. Eng. Mech., 892–900.
Maekawa, K., Okamura, H., and Pimanmas, A. (2003). Non-linear mechanics of reinforced concrete, CRC Press, Boca Raton, FL.
Park, R., Priestley, M. J. N., and Gill, W. D. (1982). “Ductility of square-confined concrete columns.” J. Struct. Div., 108(ST4), 929–950.
PTI (Post-Tensioning Institute). (2006). Post-tensioning manual, 6th Ed., Chicago.
Richart, F. E., Brandtzaeg, A., and Brown, R. L. (1928). A study of the failure of concrete under combined compressive stresses, Univ. of Illinois, Urbana, IL.
Roberts, C. L. (1990). “Behavior and design of the local anchorage zone of post-tensioned concrete members.” Master’s thesis, Univ. of Texas at Austin, Austin, TX.
Sanders, D. H. (1990). “Design and behavior of anchorage zones in post-tensioned concrete members.” Ph.D. thesis, Univ. of Texas at Austin, Austin, TX.
Vecchio, F. J., and Collins, M. P. (1993). “Compression response of cracked reinforced concrete.” J. Struct. Eng., 3590–3610.
Wurm, P., and Daschner, F. (1977). “Versuche uber Teilflaechenbelastung von Normalbeton [Test results of normal weight concrete subjected to partial load].” Deutscher Ausschuss fur Stahlbeton, 286, 1–80 (in German).
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 144 • Issue 3 • March 2018
Copyright
©2017 American Society of Civil Engineers.
History
Received: Sep 19, 2016
Accepted: Jul 27, 2017
Published online: Dec 20, 2017
Published in print: Mar 1, 2018
Discussion open until: May 20, 2018
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.