混凝土结构钢筋脱钝的随机可靠度分析

李卓莹; 周新刚; 刘志勇

doi:10.13204/j.gyjz200808017

混凝土结构钢筋脱钝的随机可靠度分析

doi: 10.13204/j.gyjz200808017

1.
烟台大学土木工程学院,烟台 264005

详细信息

作者简介:
李卓莹男 1981年出生硕士研究生.E-mail:lizhuoying@eyou.com

计量
- 文章访问数: 69
- HTML全文浏览量: 3
- PDF下载量: 59
- 被引次数: 0
出版历程
- 收稿日期: 2007-09-17
- 刊出日期: 2008-08-20

RELIABILITY ANALYSIS OF THE STEEL BAR DEPASSIVATION IN REINFORCED CONCRETE STRUCTURES

1.
School of Civil Engineering,Yantai University Yantai 2640050

摘要

摘要: 根据混凝土临界氯离子浓度和氯离子扩散系数与水灰比、环境温度等的关系式,计算出不同条件下受氯盐侵蚀混凝土结构50年内钢筋表面的氯离子浓度。在分析钢筋混凝土结构钢筋表面氯离子浓度随服役年限关系的基础上,用Monte Carlo方法对钢筋脱钝的随机可靠度进行分析。对保护层厚度、水灰比和环境温度等随机变量对海工混凝土结构钢筋脱钝概率的影响进行探讨。
- 寿命预测 /
- 钢筋脱钝 /
- Fick第二定律 /
- MonteCarlo方法 /
- 随机变量
Abstract: The relationships between the critical chloride concentration in marine concrete,the chloride diffusion coefficient of concrete and the water cement ratio,temperature of environment are established.The chloride concentration near surface of the steel bars in concrete eroded by the sea water in 50 years is analyzed.Based on the analysis of the relation of chloride concentration near surface of the steel bars to service time,the reliability of the steel bars depassivation is investigated by Monte Carlo method.The influence of stochastic variables,such as concrete cover to reinforcement,water-cement ratio,temperature of environment,etc,on the reliability of the steel bars depassivation in marine concrete is discussed.
- service life prediction /
- steel bar depassivation /
- fick's second law /
- monte carlo method /
- stochastic variables

HTML全文

参考文献(8)

[2] 中国工程院士木水利与建筑学部.混凝土结构耐久性设计与施工指南.北京:中国建筑工业出版社,2005

General Guidelines for Durability Design and Redesign.The European Union-Brite EuRam,BRPR-CT95-0132,BE95-1347.2000.2:90-95

[3] Zhang T.Gjorv O E.Effect of Ionic Interaetiou in Migration Testing of Chloride Diffusivity in Concrete.Cement and Concrete Research,1995,25:1 535-1 542

[4] Amey S L,Johnson D A,Mihenberger M A,et al.Temperalure Dependence of Compressive Strength of Conversion-Inhibited High Alumina Cement Concrete.ACI Structural Journal,1998,95 (1):27-36

[5] Bentz E C,Thomas M D A.Life-365 Service Life Prediction ModelTM-Computer Program for Predicting the Service Life and Life-Cycle Costs of Reinforced Concrete Exposed to Chlorides.Versionl.1.2001.12

[6] 黄克中,毛善培.随机方法与模糊数学应用.上海:同济大学出版社,1987

[7] 赵国藩,金伟良.结构可靠度理论.北京:中国建筑工业出版社,2000

[8] 保护层厚度专题研究组.钢筋混凝土保护层厚度取值的建议.建筑结构学报,1982(5):13-22

施引文献

资源附件(0)

访问统计