Variations of Steel Corrosion and It-induced and Affected Cracks in RC Tensile Ties Accelerately Deteriorated by Impressed-Current Method

Jian-Guo Dai, Ema Kato, Mitsuyasu Iwanami, Hiroshi Yokota

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic research

Abstract

This paper performed carefully an experimental program to investigate the cracking distributing characteristics in eighteen 2.0m long uni-axial RC tensile ties, most of which experienced accelerated corrosion by impressed current method. Test variables for these ties include bar type, bar diameter, and tie confinement condition. Two types of cracks are focused for discussion in this paper. One is the corrosion-induced crack before the tensile loading. The main task is to clarify the statistical distribution characteristics of corrosion-induced steel mass loss and corrosion-induced surface crack widths. Another focus is the crack of corroded tensile RC ties subjected to mechanical loading. This loading crack is strongly influenced by the corrosion-induced bond loss. A solid benchmark database is available through this study that can be used for calibrating the existing models which predict corrosion-induced crack widths or corrosion induced bond loss. An integrated understanding achieved in this study on the cracking behavior of corroded RC ties can help improve the corrosion evaluation in deteriorated RC members. Moreover, the statistical characteristics learned from tests of the steel corrosion and its induced and influencedcracks can be referred for performing the reliability-based service life analysis of corrosion affected concrete structures.
Original languageEnglish
Title of host publicationLife Cycle Management of Coastal Concrete Structures
EditorsH. Yokota, T. Shimomura
PublisherPort and Airport Research Institute
Pages101-108
Number of pages8
ISBN (Print)4-903750-00-0
Publication statusPublished - 2006
Externally publishedYes

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