论文部分内容阅读
为了提高混凝土结构耐久性评估结果的准确性和客观性,提出了一种基于灰色系统理论的混凝土结构耐久性评估方法.该方法首先以现场检测的数据为依据,进行“少数据”建模,并用非线性数学模型取代传统的线性模型对评估指标值进行归一化处理;然后应用层次分析法改进初始专家权重,并构造变权重;再基于灰色理论对样本及评价指标进行分析,并以灰色关联度作为划分混凝土结构或构件耐久性技术状态的主要依据;最后通过算例分析,说明了该方法的应用过程,并验证了该方法计算结果的可靠性.计算结果表明:基于灰色关联度的在役混凝土结构耐久性评估方法能够有效减小主观因素和专家知识对评估结果的影响,且计算过程简单,适于实际工程应用.
In order to improve the accuracy and objectivity of the assessment results of the durability of concrete structures, a method of assessing the durability of concrete structures based on the gray system theory is proposed. This method first makes a “less data” based on the data of on-site inspection And use the nonlinear mathematical model to replace the traditional linear model to normalize the evaluation index value. Then, the analytic hierarchy process (AHP) is used to improve the initial expert weight and construct the variable weight. Then the gray theory is used to analyze the sample and the evaluation index The gray relational degree is taken as the main basis for dividing the technical state of durability of concrete structures or components. Finally, an example is given to illustrate the application process of the method, and the reliability of the method is verified. The calculation results show that the gray correlation Degree durability of existing concrete structure assessment method can effectively reduce the impact of subjective factors and expert knowledge on the assessment results, and the calculation process is simple and suitable for practical engineering applications.