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Advances in Materials Science and Engineering
Volume 2017 (2017), Article ID 9858506, 15 pages
https://doi.org/10.1155/2017/9858506
Research Article

A Parameter Sensitivity Analysis of the Effect of Rebar Corrosion on the Stress Field in the Surrounding Concrete

1Department of Bridge Engineering, College of Civil Engineering, Tongji University, Shanghai 20009, China
2Ningbo Highway Administration Bureau, Ningbo 315040, China

Correspondence should be addressed to Fangyuan Li; nc.ude.ijgnot@ilyf

Received 16 December 2016; Accepted 4 April 2017; Published 30 April 2017

Academic Editor: Wei Zhou

Copyright © 2017 Fangyuan Li and Wenya Ye. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Rebar corrosion results in a change in the stress field in the surrounding concrete, which in turn accelerates the deterioration of the concrete structure. In addition to the protective layer, the compressive stress under which concrete is prestressed also affects the effect of corrosion-induced rebar expansion on the stress field in the concrete. The present study simulates the effect of corrosion-induced rebar expansion on the stress field in the concrete using the finite element method (FEM) by applying a virtual radial displacement to the product of corrosion-induced rebar expansion. Based on an analysis of the effect of multiple rebars on the stress field in ordinary concrete, stress distribution in the protective layer of the concrete is determined. Afterward, the locations where there is damage to the surface concrete caused by rebar corrosion are determined. After verifying the feasibility of the FEM analysis, the effect of corrosion-induced ordinary rebar expansion in a typical prestressed concrete segment is determined by analyzing the characteristics of corrosion-induced rebar expansion occurring in various prestressed concrete specimens.