Study on prestress loss and safety performance of retard-bonded prestressed cast-in-place piles

Wenwei Zhu, Xuelin Yang, Haoyi Zhou, Jingli Yang and Xinlin Yao

PLOS ONE, 2026, vol. 21, issue 8, 1-17

Abstract: The retard-bonded prestressed cast-in-place pile (RBPCP) represents a novel anti-floating structural technology with prominent advantages, including low cost and improved crack resistance. The structure and design methodology of the RBPCP and a new arrangement form for the retard-bonded prestressed reinforcing bar (RBPR) were presented. The test equipment and two-stage loading method were developed to facilitate static uplifting load tests of RBPCPs. Test study and numerical analysis on the prestress loss were conducted. The results indicate that the prestress loss in the pile increases with pile depth. Comparative analysis between required prestress and reserve prestress indicates that such loss exerts a negligible influence on the lower pile part. Moreover, the entire pile can maintain a compressive stress state as long as the tension load reaches the designed uplift bearing capacity. Therefore, the RBPCP demonstrates outstanding safety performance and is suitable for widespread application in engineering.

Date: 2026
References: Add references at CitEc
Citations:

Downloads: (external link)
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0352608 (text/html)
https://journals.plos.org/plosone/article/file?id= ... 52608&type=printable (application/pdf)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0352608

DOI: 10.1371/journal.pone.0352608

Access Statistics for this article

More articles in PLOS ONE from Public Library of Science
Bibliographic data for series maintained by plosone ().