Bond of 13 mm prestressing steel strands in pretensioned concrete members

• DOI: 10.1016/j.engstruct.2012.03.056
• Publication Date: 2012-05-07T17:48:29Z
• Authors: J.R. Martí-Vargas; P. Serna; J. Navarro-Gregori; L. Pallarés
• Keywords: Development length; INGENIERIA DE LA CONSTRUCCION; Prestress; Anchorage length; Transfer length; 02 engineering and technology; Transmission length; Bond; Strand; Concrete; 0201 civil engineering

This paper presents an experimental research work to determine both the transmission and the anchorage lengths of seven-wire prestressing steel strands in different concrete mixes. A testing technique based on a bond behavior analysis by measuring the force supported by the prestressing strand on a series of specimens with different embedment lengths has been used. Relationships between the average bond stress for both the transmission length and anchorage length as a function of the concrete compressive strength have been found. Equations to compute transmission and anchorage lengths of 13 mm prestressing strands have been obtained. The experimental results have been compared with the theoretical prediction from proposed equations in the literature and with experimental results from other authors. 2012 Elsevier Ltd. All rights reserved.<br/>The content of this article forms part of the research work that the Institute of Concrete Science and Technology (ICITECH) is presently conducting in conjunction with PREVALESA and ISOCRON. This study has been funded by the Spanish Ministry of Education and Science and ERDF (Project BIA2006-05521). The authors wish to thank the above companies as well as the concrete structures laboratory technicians at the Universitat Politecnica de Valencia for their cooperation. Finally, the authors also wish to pay their respects to C.A. Arbelaez.<br/>