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通过构建以不规则五边形最小面积为特征向量的评价函数,将对既有钢筋混凝土拱肋承载力的定性描述定量化,并利用雷达图推算出承载力评定的检算系数Z1的标度评价值,有效地消除了各项因素之间的线性关系。基于最小二乘法拟合了检算系数Z1与其标度评价值之间的曲线方程。用检算系数Z1对不考虑损伤的有限元计算结果进行修正,获得承载力评定值,并对两片服役多年的既有钢筋混凝土拱肋的承载力开展试验研究。结果表明,承载力评定值与试验结果吻合较好,可为既有钢筋混凝土拱肋的承载力评估提供科学依据。
By constructing the evaluation function with the smallest area of irregular pentagon as the eigenvector, the qualitative description of the bearing capacity of the existing reinforced concrete arch rib is quantified, and the scale of the bearing coefficient evaluation factor Z1 is deduced by using the radar chart Evaluation value, effectively eliminating the linear relationship between the various factors. Based on the least squares method, the curve equation between the estimation coefficient Z1 and its scale evaluation value is fitted. The calculation result of finite element without considering the damage is corrected by the coefficient Z1 to obtain the evaluation value of the bearing capacity, and the experimental research on the bearing capacity of two existing reinforced concrete arch ribs with years of service is carried out. The results show that the evaluation value of the bearing capacity is in good agreement with the test result, which can provide a scientific basis for the assessment of the bearing capacity of the existing reinforced concrete arch rib.