Probabilistic evaluation of initiation time in RC bridge beams with load-induced cracks exposed to de-icing salts

被引：41

作者：

Lu, Zhao-Hui ^{[1
]}

Zhao, Yan-Gang ^{[2
]}

Yu, Zhi-Wu ^{[1
]}

Ding, Fa-Xing ^{[1
]}

机构：

[1] Cent S Univ, Sch Civil Engn & Architecture, Changsha 410075, Hunan, Peoples R China

[2] Kanagawa Univ, Dept Architecture & Bldg Engn, Kanagawa Ku, Yokohama, Kanagawa 2218686, Japan

来源：

CEMENT AND CONCRETE RESEARCH | 2011年 / 41卷 / 03期

基金：

国家高技术研究发展计划(863计划); 中国国家自然科学基金;

关键词：

Reinforced concrete beams; Chloride; Load-induced cracks; Corrosion initiation; Probabilistic model; CHLORIDE-INDUCED CORROSION; REINFORCED-CONCRETE; SERVICE LIFE; THRESHOLD CHLORIDE; PREDICTION; DIFFUSION; RELIABILITY; BARS;

D O I：

10.1016/j.cemconres.2010.12.003

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In this study, a reliability-based method for predicting the initiation time of reinforced concrete bridge beams with load-induced cracks exposed to de-icing salts is presented. A practical model for predicting the diffusion coefficient of chloride ingress into load-induced cracked concrete is proposed. Probabilistic information about uncertainties related to the surface chloride content and the threshold chloride concentration has been estimated from a wide review of previous experimental or statistical studies. Probabilistic analysis to estimate the time to corrosion initiation with/without considering the effect of the load-induced cracks on the chloride ingress into concrete has been carried out. Results of the analysis demonstrate the importance of considering the effect of the load-induced cracks for correct prediction of corrosion initiation in RC bridge beams exposed to chlorides. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：365 / 372

页数：8

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