A novel elastic-body-rotation model for concrete cover spalling caused by non-uniform corrosion of reinforcement

被引：22
作者：
Su, Ray Kai Leung [1 ]
Zhang, Yanlong [1 ]
机构：
[1] Univ Hong Kong, Dept Civil Engn, Pokfulam Rd, Hong Kong, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 213卷
关键词：
Concrete cover; Non-uniform corrosion; Cover spalling; Analytical model; LOCALIZED STEEL CORROSION; CRACK-PROPAGATION; ACCELERATED CORROSION; MACROCELL CORROSION; REBAR CORROSION; RC BEAMS; SURFACE CRACKING; FILLED PASTE; RUST LAYER; TIME;
D O I：
10.1016/j.conbuildmat.2019.04.096
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
A novel elastic-body-rotation model is proposed to analyze the mechanism and the process of cover cracking and spalling caused by the non-uniform corrosion of widely spaced reinforcements. The width of the cover surface cracks, bulging of the concrete surface and maximum thickness of the corroded steel can be predicted by using the proposed model. The predicted bulging of the concrete cover has been validated by the experimental and numerical results. Using the validated model, the effects of the diagonal crack angle, tensile strength of concrete and cover thickness on the bulging of the cover surface and the thickness of the corroded steel for initiating and widening cracks are investigated with a parametric study. It is found that the diagonal cracking angle has a major influence on the cover surface crack width. In addition, the degree of corrosion in rebars and the width of internal diagonal cracks can be evaluated by simply measuring the width of surface cracks or the bulging of cover surface. (C) 2019 Elsevier Ltd. All rights reserved.
引用
收藏
页码：549 / 560
页数：12
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