【摘要】 在役受腐蚀钢筋混凝土结构由于受到外界侵蚀介质的影响，其抗力水平随着结构服役时间的推移而处于不断的衰减过程中，在结构使用功能保持不变情况下结构可靠度逐渐降低，因此在确定设计基准期内难以完成预期设计功能。基于结构控制截面的强度衰减规律，从《建筑结构设计统一标准》出发，研究建立了不维修受腐蚀结构综合考虑其直接投资和服役效益的最佳设计可靠度指标的决策方法，对侵蚀性介质环境下工作的建筑结构的可靠性设计提供了一种建设性的理论指导更多还原

【Abstract】 For affected by outside erosive medium,the resistance level of corroded reinforced concrete structures is in the course of continuous decaying,with the servicing time,the structure reliability reduces constantly on the condition of invariable service function,which makes it difficult to achieve the expectant function in defined designing base time.According to The Unite Criteria of Structure Design,the paper,based on the law of the strength decaying of structure domination section,defines the decision of the best reliability index of unmaintenance corroded structure,which synthetically considers the direct investment and service benefits.It brings out a constructive theoretic direction for reliability design of working structures in erosive medium environment.更多还原