华中科技大学学报（自然科学版）2025，Vol.53Issue(8)：82-89,8.DOI:10.13245/j.hust.250400
一般大气环境下RC结构钢筋初锈极限状态目标可靠指标
Calibration of target reliability index of RC structures for corrosion-initiation limit state in atmospheric environment
摘要
Abstract
Regarding the issue of determining the target reliability index value for the initial rust durability limit state of RC structural steel bars in general atmospheric environments,referring to the current standard for determining the target reliability index of bearing capacity limit state,the corresponding durability probability control level was determined through calibration method combined with analogy method.Firstly,based on the carbonization depth prediction model and carbonization depth database,the probability characteristics of the uncertainty coefficients of each model were calculated.Secondly,the Monte Carlo method was used to determine the implicit reliability indicators of each model design.Finally,the target reliability index for this stage was determined by analogy with the reliability index of the initial rust durability limit state of steel bars adopted by existing scholars.The research reveals that the target reliability index for the durability limit state of reinforcement corrosion initiation in atmospheric conditions is 0.9,indicating that the values adopted by current codes and scholars are overly conservative.This finding offers a theoretical probabilistic foundation for the durability design concerning the corrosion-initiation limit state of steel reinforcement in atmospheric conditions,and provides a data basis for the target reliability indices of other environment and the remaining durability limit states.关键词
一般大气环境/钢筋初锈/目标可靠指标/模型不定性系数/校准法Key words
atmospheric environment/corrosion-initiation limit state/target reliability index/coefficient of model uncertainty/calibration method分类
建筑与水利引用本文复制引用
陈柳灼,周炎,姚继涛,李昆..一般大气环境下RC结构钢筋初锈极限状态目标可靠指标[J].华中科技大学学报（自然科学版）,2025,53(8):82-89,8.基金项目
湖北省自然科学基金青年项目(2024AFB302) （2024AFB302）
防灾减灾湖北省重点实验室开放基金资助项目(2022KJZ14). （2022KJZ14）
