Probabilistic Corrosion Initiation Time Assessment of Existing Concrete Structures Under Marine Environment

被引：2

作者：

Wu, Lingjie ^{[1
]}

Kou, Xinjian ^{[1
]}

Jiang, Meng ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Naval Architecture Ocean & Civil Engn, Shanghai 200240, Peoples R China

来源：

ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING | 2015年 / 40卷 / 11期

关键词：

Chloride; Corrosion initiation time; Existing concrete structure; Sensitivity; CHLORIDE-INDUCED CORROSION; REINFORCED-CONCRETE; SERVICE-LIFE; PERFORMANCE; RELIABILITY; DURABILITY; SURFACE; STEEL; BEAMS;

D O I：

10.1007/s13369-015-1774-y

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Marine environment is one of the most aggressive exposure conditions for concrete structures. The paper presents a probabilistic evaluation of corrosion initiation time of 80-month-old concrete structures under tropical marine environment with optimization method and Monte Carlo simulations. Results indicate that concrete cover depth and diffusion coefficient obey normal distribution and lognormal distribution, respectively. With target probability of failure value of 10%, corrosion initiation time is about 40 years after completion of construction. Compared with Monte Carlo simulations, optimization algorithm is an efficient method applied to the problem of chloride diffusion taking into consideration the time-dependent property of chloride diffusion coefficient. Sensitivity analysis should consider the influence of distribution and coefficient of variation of random variables.

引用

页码：3099 / 3105

页数：7

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