Jingyuan Li, Tomohiro Miki, Qiuning Yang, Mingjie Mao
{"title":"Influence of Corrosion Conditions on Prestressing Force and Residual Tensile Capacity of Corroded Prestressed Concrete Steel Strands","authors":"Jingyuan Li, Tomohiro Miki, Qiuning Yang, Mingjie Mao","doi":"10.3151/jact.21.956","DOIUrl":null,"url":null,"abstract":"</p><p>This paper investigates the mechanism of the corrosion pattern of wires on the prestressing forces of prestressed concrete (PC) strands. A rigid frame testing machine combined with an electrically accelerated corrosion device was used to test 16 steel strands. Specimens subjected to the tensile load of 50% of the tensile strength were divided into three groups according to the target corrosion level (mass loss). The rigid frame testing machine can remain the prestressing force, and the force and deformation were measured continuously during the corrosion test. The prestress was degraded in two stages; the beginning and development of the second stage being related to the maximum cross-sectional area loss and fracture type of the wires, respectively. The prestress loss of the strands was the result of the internal force balance after the deterioration of the tensile properties. It was found that the deterioration process of the ultimate tensile capacity related to the fracture type of the wire. The fracture type of PC strand was influenced by the shape and the distribution of the cross-sectional area loss of corroded wires.</p>\n<p></p>","PeriodicalId":14868,"journal":{"name":"Journal of Advanced Concrete Technology","volume":null,"pages":null},"PeriodicalIF":1.6000,"publicationDate":"2023-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Advanced Concrete Technology","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.3151/jact.21.956","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
This paper investigates the mechanism of the corrosion pattern of wires on the prestressing forces of prestressed concrete (PC) strands. A rigid frame testing machine combined with an electrically accelerated corrosion device was used to test 16 steel strands. Specimens subjected to the tensile load of 50% of the tensile strength were divided into three groups according to the target corrosion level (mass loss). The rigid frame testing machine can remain the prestressing force, and the force and deformation were measured continuously during the corrosion test. The prestress was degraded in two stages; the beginning and development of the second stage being related to the maximum cross-sectional area loss and fracture type of the wires, respectively. The prestress loss of the strands was the result of the internal force balance after the deterioration of the tensile properties. It was found that the deterioration process of the ultimate tensile capacity related to the fracture type of the wire. The fracture type of PC strand was influenced by the shape and the distribution of the cross-sectional area loss of corroded wires.
期刊介绍:
JACT is fast. Only 5 to 7 months from submission to publishing thanks to electronic file exchange between you, the reviewers and the editors.
JACT is high quality. Peer-reviewed by internationally renowned experts who return review comments to ensure the highest possible quality.
JACT is transparent. The status of your manuscript from submission to publishing can be viewed on our website, greatly reducing the frustration of being kept in the dark, possibly for over a year in the case of some journals.
JACT is cost-effective. Submission and subscription are free of charge . Full-text PDF files are available for the authors to open at their web sites.
Scope:
*Materials:
-Material properties
-Fresh concrete
-Hardened concrete
-High performance concrete
-Development of new materials
-Fiber reinforcement
*Maintenance and Rehabilitation:
-Durability and repair
-Strengthening/Rehabilitation
-LCC for concrete structures
-Environmant conscious materials
*Structures:
-Design and construction of RC and PC Structures
-Seismic design
-Safety against environmental disasters
-Failure mechanism and non-linear analysis/modeling
-Composite and mixed structures
*Other:
-Monitoring
-Aesthetics of concrete structures
-Other concrete related topics