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Evaluation of prestress losses in prestressed concrete specimens subjected to freeze–thaw cycles
School of Civil Science and Engineering, Yangzhou University, No.198 HuaYang XiLu, HanJiang District, Yangzhou 225127, P.R. China.
School of Civil Engineering, Southeast University, No.2 SiPaiLou, XuanWu District, Nanjing 210096, P.R. China.
School of Civil Engineering, Southeast University, No.2 SiPaiLou, XuanWu District, Nanjing 210096, P.R. China.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering. School of Civil Engineering, Southeast University, No.2 SiPaiLou, XuanWu District, Nanjing 210096, P.R. China.ORCID iD: 0000-0002-8372-1967
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2016 (English)In: Structure and Infrastructure Engineering, ISSN 1573-2479, E-ISSN 1744-8980, Vol. 12, no 2, p. 159-170Article in journal (Refereed) Published
Abstract [en]

Prestressed concrete structures are considered to be reliable and durable. However, their long-term performance when subjected to frost attack is still unclear. In this work, experiments were carried out to evaluate the prestress losses in post-tensioned prestressed concrete specimens subjected to freeze–thaw cycles (FTCs). Two cases were considered: in one case, a series of specimens were prepared and tested in a freeze–thaw chamber; in the second case, the same series of specimens were tested in an indoor environment (outside the chamber). The difference between the prestress losses of the specimens inside the freeze–thaw chamber and those outside the chamber equalled the prestress losses due to FTCs. When using mathematical models to predict the prestress losses due to the FTCs, it was found that they were relatively small when the concrete was slightly damaged. However, they increased rapidly when the FTCs were repeated. The eccentricity of the prestress wires led to larger prestress losses when subjected to FTCs. Moreover, the same cross section and eccentricity resulted in similar prestress losses due to the FTCs, and the relatively high-strength concrete could withstand more FTCs.

Place, publisher, year, edition, pages
Abington, UK: Taylor & Francis, 2016. Vol. 12, no 2, p. 159-170
Keywords [en]
concrete, post-tensioned, prestress loss, freeze –thaw cycles, experiments, mathematical model
National Category
Infrastructure Engineering Mathematical Analysis
Research subject
Structural Engineering; Mathematics
Identifiers
URN: urn:nbn:se:ltu:diva-83275DOI: 10.1080/15732479.2014.998241ISI: 000365600100002Scopus ID: 2-s2.0-84948387806OAI: oai:DiVA.org:ltu-83275DiVA, id: diva2:1537525
Available from: 2021-03-15 Created: 2021-03-15 Last updated: 2023-09-14Bibliographically approved

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