根据化工侵蚀性环境下工作的钢筋混凝土结构的服役特点，研究了结构基于强度维修准则时的加固策略，针对工程实际中常存在的待维修结构要求条件，分别建立了在不同前提情况下的结构维修加固决策的数学模型，并依此设计了在役钢筋混凝土结构基于维修目标可靠度条件下的构件截面维修加固策略。 According to the service characteristics of reinforced concrete structures working under the aggressive environment of chemical industry, the reinforcement strategies of structures based on strength maintenance criteria were studied. According to the requirements of the structure requirements to be maintained in engineering practice, the structural maintenance under different preconditions was established respectively. The mathematical model of the reinforcement decision was made, and based on this, the maintenance and reinforcement strategy of the component section under the condition of reliability of the maintenance target was designed for the in-service reinforced concrete structure.