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Author:

Lu, Zhao-Hui (Lu, Zhao-Hui.) | Wu, Shi-Yu (Wu, Shi-Yu.) | Tang, Zhuo (Tang, Zhuo.) | Zhao, Yan-Gang (Zhao, Yan-Gang.) | Li, Wengui (Li, Wengui.)

Indexed by:

EI Scopus SCIE

Abstract:

The corrosion of steel strands due to the chloride contamination is one of the most common causes for the degradation of prestressed concrete infrastructure. In this paper, an experimental study was performed to investigate the bond behaviors between steel strands and concrete after suffered the chloride corrosion. Total twenty central and off-center pull-out specimens with different corrosion levels were prepared and tested, in which the electrochemical acceleration method was employed to induce various corrosion levels. The effects of corrosion rate, stirrup configuration and holding condition of concrete to the steel strands on the bond behaviors of steel strands were studied and compared, in terms of the failure mode, bond-slip relationship, bond strength, and bond toughness. The results show that both the ultimate bond strength and characteristic bond strength decreased with the increase of corrosion degree. The presence of stirrups can significantly enhance the bond performance, indicating the more ductile failure characteristic and increased bond toughness. Moreover, the prediction results using empirical and analytical models are also compared with the experimental results to verify their applicability and accuracies in predicting the bond strength of steel strands after corrosion.

Keyword:

Steel strands Bond behavior Concrete Chloride corrosion Pull-out test

Author Community:

  • [ 1 ] [Lu, Zhao-Hui]Beijing Univ Technol, Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Wu, Shi-Yu]Beijing Univ Technol, Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China
  • [ 3 ] [Zhao, Yan-Gang]Beijing Univ Technol, Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China
  • [ 4 ] [Lu, Zhao-Hui]Cent South Univ, Sch Civil Engn, Changsha 410075, Hunan, Peoples R China
  • [ 5 ] [Tang, Zhuo]Univ Technol Sydney, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia
  • [ 6 ] [Li, Wengui]Univ Technol Sydney, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia
  • [ 7 ] [Zhao, Yan-Gang]Kanagawa Univ, Dept Architecture, Kanagawa Ku, 3-27-1 Rokkakubashi, Yokohama, Kanagawa 2218686, Japan

Reprint Author's Address:

  • [Li, Wengui]Univ Technol Sydney, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia

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Source :

MATERIALS AND STRUCTURES

ISSN: 1359-5997

Year: 2021

Issue: 3

Volume: 54

3 . 8 0 0

JCR@2022

ESI Discipline: MATERIALS SCIENCE;

ESI HC Threshold:116

JCR Journal Grade:2

Cited Count:

WoS CC Cited Count: 21

SCOPUS Cited Count: 21

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 12

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