混凝土耐久性评价指标体系及寿命预测研究

Research on evaluation index system of durability and life prediction for concrete structure

根据我国环境特征将建筑所处环境类型进行了划分,针对不同环境下各耐久性因素的影响程度不同建立了混凝土耐久性综合评价指标体系;结合熵的性质,运用可拓层次分析法确定单一环境下各影响因素指标的权重,解决了传统层次分析法中专家认识的不全面和不统一性问题,又在一定程度上消除了指标权重计算的主观作用;在此基础上,编制了混凝土耐久性评价及剩余寿命预测软件,经实例检验正确,具有一定的应用价值。

According to the different environment characteristics of china, the envirolarnent are divided into five types.Concrete durabili- ty evaluation index system is established in connection with different influence degree of durability factors in different environment.Com- bining with the properties of entropy,the weight of each influence factor index in a specific environment is determined by using extension analytic hierarchy process, in order to avoid the disunity and incomplete of traditional AHP and eliminate the subjectivity to a certain ex- tent in the process of index weight calculation.On this basis, an application sot%vare of the concrete durability evaluation and the life pre- diction for existing structure is programmed, which is applied in the living example.The analysis result shows that the application software has some important application value and practical significance, which can evaluate the durability of concrete structure effectively.