Durability of Reinforced Concrete Structures under Coupling Action of Load and Chlorine Erosion

• 作者: Dongwei Yang Jiangkun Zhang Yang Li
• 来源期刊: 结构耐久性与健康监测(英文)
• 学科: 工学
• 关键词: Concrete DURABILITY reliability index coupling effect CHLORIDE ion DIFFUSION
• 年，卷（期）: 2018,（1）
• 页码范围: 51-63
• 页数: 13页
• 分类号: TG1

摘要

Diffusion behavior of chloride ion in reinforced concrete under bendingmoment was studied by taking the ratio of bending moment to ultimate flexural capacity asload level indicator. The function relationship between load level and chloride iondiffusion coefficient was established, based on that the limit state equation of the chlorideion critical concentration and chloride ion concentration on surface of the steel bar wasestablished. Then by applying Monte-Carlo method the corrosion probability ofreinforcement under different load levels in splash zone was calculated. Calculation resultsdemonstrated that compared with the durability reliability index considering loading effect,the reliability index without considering loading effect could be 100% higher. Inconsideration of requirement for concrete durability, some revision suggestion was putforward. It was recommended that for beam members with different design life in splashzone, the corresponding minimum cover thickness should be adjusted properly as well aswater-cement ratio limit.