摘要
氯离子扩散系数是氯盐环境下混凝土耐久性的主要指标,该文针对其建议了港珠澳工程混凝土耐久性的质量接收准则。首先给出了氯离子扩散系数设计指标和质量控制指标的不确定性对应关系,然后基于结构可靠性的基本原理,利用Fick第二定律模型,确定了不同环境作用、材料配比及保护层厚度下的氯离子扩散系数质量控制特征值,同时得出满足结构耐久性要求下限的氯离子扩散系数保证率为75%。最后考虑抽样方案中的使用者风险和生产者风险应平衡的原则,制定了港珠澳工程氯离子扩散系数的质量接收准则。
The chloride diffusion coefficient, DCl, is a main indicator of concrete durability in chloride-induced corrosion environments. Taking DCl as the control parameter, this paper proposes quality acceptance criteria for concrete durability in the HZM(Hong Kong-Zhuhai-Macao) sea-link project. First, an uncertainty relationship between the design parameter and the quality control parameter was established. Then, according to the fundamental reliability principle, this research developed quality control characteristic values of DCl in different exposure zones, using a durability design model based on Fick's Second Law, and further, the concrete assurance percentage corresponding to the lower limit requirement for structure durability was determined to be 75%. Finally, considering the balance between the consumer's risk and the producer's risk in any sampling plan, the acceptance criteria for the HZM project were given.
出处
《工程力学》
EI
CSCD
北大核心
2015年第3期175-182,共8页
Engineering Mechanics
基金
国家科技支撑计划项目(2011BAG07B04)
关键词
港珠澳工程
氯离子扩散系数
质量控制
可靠性
接收准则
HZM project
chloride diffusion coefficient
quality control
reliability
acceptance criteria
