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根据各检测指标的评定标度,运用未确知测度理论建立各检测指标的测度函数;根据各部位检测数据建立外观裂缝、混凝土强度、碳化深度、保护层厚度、钢筋锈蚀的单指标未确知测度矩阵,并以每个指标各部位未确知测度的平均值作为该指标的未确知测度,形成多指标未确知测度矩阵;综合考虑各检测指标权重,求得桥梁结构的未确知测度,根据置信度识别准则对桥梁结构的健康状况进行评估.评估结果表明,该方法减小了桥梁耐久性评估中评估专家的主观性,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.
According to the evaluation scale of each test index, the measurement function of each test index is established by using the unascertained measurement theory. According to the test data of each part, the single index of appearance crack, concrete strength, carbonation depth, protective layer thickness and steel corrosion is not known Measure the matrix, and take the average of unascertained measure of each part of each indicator as the unascertained measure of the indicator to form a multi-indicator unascertained measure matrix; comprehensively consider the weight of each detection indicator to obtain the unascertained bridge structure The evaluation results show that this method reduces the subjectivity of evaluation experts in bridge durability assessment and makes the evaluation conclusion more credible. The calculation results are in good agreement with other methods Compared with a higher accuracy.