钢筋混凝土构件质量综合评判的变权模型

Variable weight model for comprehensive identification of existing RC members' quality

为客观评价建筑物中钢筋混凝土构件的老化病害程度,在既有钢筋混凝土构件质量单因素评判的基础上,根据属性识别理论,建立了既有钢筋混凝土构件质量综合评判的变权模型。利用待评构件中各评价因子对构件质量的贡献率确定各评价因子的权重系数,由给定的置信度大小对构件质量进行综合评判,确定构件质量的特征状态。该方法不但可以进行属性分类识别,而且对于同一类的属性,还可以利用综合得分排序进行再分类。实例分析表明,该方法是解决既有建筑物老化病害钢筋混凝土构件质量评价的可行方法。

Ageing diseases of RC members of existing building structures often result in deficiency of members' loading capacity and descending of entire rigidity. As a result, the normal performance of the loading members is restricted. Based on the information of single factors of existing RC members' quality and the attribute identification theory, a variable weight model is established for comprehensive identification of existing RC members' quality. Weights are given according to the contribution rate of every evaluation factors to members' quality. According to the given degree of confidence, comprehensive identification of members' quality is proceeded and the characteristic state of members' quality is determined. Based on this method, the members can be sorted into several classes. And to the same class, further classification can be proceeded by the comprehensive scores. The analysis of a practical example shows that this method is feasible to solve the problem of quality identification for ageing RC members of existing building structures.