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Book ChapterDOI

An Assessment of the Deterioration of Flexural Capacity of a Pretensioned Concrete Girder Due to Strand Corrosion

TL;DR: In this paper, the effect of chloride-induced corrosion in the flexural capacity of a pretensioned concrete girder in an existing girder-and-slab deck bridge was analyzed.
Abstract: This paper illustrates the effect of chloride-induced corrosion in the flexural capacity of a pretensioned concrete girder in an existing girder-and-slab deck bridge. The numerical study of the time-wise variation of the flexural capacity is based on a proposed model for the loss of cross-sectional area of the prestressing strands. It was observed that almost 46% of the total area of strands can get affected due to chloride-induced corrosion of the girder, by the end of its service life. The corresponding flexural capacity of the girder gets reduced by 50% of its initial capacity.
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Journal ArticleDOI
TL;DR: In this article, the authors discuss the magnitude of the problem, the corrosion damage and identify those methodologies that have either been used or could potentially be used to provide increased corrosion protection of prestressing steels.
Abstract: In the last decade, there has evolved an increasing awareness and understanding of environmental effects and their potential for long-term degradation of the structures we build. Today, there is a better understanding of such phenomena as carbonation of concrete and the ingress of chloride ions even in crack-free concrete. As a result of these factors and recent evidence of severe corrosion damage, in many countries an increasing concern has arisen among engineers regarding possible corrosion damage to prestressing tendons and long-term service life. This paper discusses the magnitude of the problem, the corrosion damage and identifies those methodologies that have either been used or could potentially be used to provide increased corrosion protection of prestressing steels.

41 citations