Durability evaluation of concrete structure based on fuzzy extension AHP

In the paper, Fuzzy extension AFTP(Analytic Hierarchy Process) model is proposed to evaluate concrete structure durability, according to the concrete durability indexes are multiple-levels, multiple-factors and fuzzy. In the method, the extension interval judgment matrix is applied to calculated the weight of every durability index, at the same time the fuzzy comprehensive evaluation method is used which can obtain every evaluate grade level by level, therefore the ultimate evaluation result is obtained. The fuzzy extension AHP method is applied in the office building of the third rolling mill of Ma'anshan steel company. The analysis result shows that the fuzzy extension AHP method is more scientific, comprehensive, accurate and convenient than the traditional AHP method, which can evaluate the durability of concrete structure effectively.