中文摘要：

鉴于现阶段酸性气体作用对受力混凝土工作性能影响研究的匮乏，采用数值计算与实例相结合的方法分析了酸性侵蚀气体对服役钢筋混凝土结构可靠度的影响，给出了混凝土中和高度、混凝土损伤高度和截面尺寸的时变规律及其与时变可靠度指标的关系。并与一般大气环境条件对比，得到了酸性侵蚀介质对受力混凝土结构产生加剧腐蚀的定量结论。对侵蚀介质环境下的建筑结构可靠性设计提供了建设性理论指导。

英文摘要：

Considering the shortage of working performance research on loading concrete structure under the influence of acid gases, influence of the acid corrosion gases on the reliability of Existing RC structure is analyzed for the first time. Time-dependent rules of the concrete＇s neutralizing height, damaging height, sectional dimension and the relationship between time-dependent reliability index are given. The quantitative conclusion that acid corrosion medium brings erosive deterioration for loading concrete structure is obtained by contrast with the general air environment. It provides the constructive theoretic direction for reliability design of structures in corrosion medium environment.