桥梁耐久性评估中指标权重系数计算方法研究

Research on Computation of Weight Coefficient of Bridge's Durability Evaluation

在桥梁耐久性评估中,综合不同专家对指标相对重要性的评判,建立最终的表达指标相对重要性的不确定判断矩阵;然后运用随机理论在判断矩阵中各指标相对重要性的取值区间内随机选取数值作为两个指标间的相对重要性参数,形成多个判断矩阵;最后由各判断矩阵计算对应的权重系数,并以其平均值作为指标的最终权重系数.从而减小了桥梁耐久性评估中评估指标权重系数计算的主观性,使评估结论更具可信性,计算结果与其他方法相比具有较高的精度.

In the durability evaluation of bridge,different experts＇ evaluation was considered together and the final uncertain judgment matrix was constructed to express relative importance of evaluation index;secondly,the random value in the interval of relative importance index is used to form many judgment matrix;finally,different weight coefficient is obtained according to the judgment matrix above,the average value of weight coefficient is the final index weight value.Thus,subjectivity of different experts is reduced and the evaluation conclusion is more credible.The research showed that the computation accuracy in this paper was very high.