基于熵权-模糊综合评价的混凝土评价可行性研究

Feasibility Study of Concrete Evaluation Based on Entropy Weight-fuzzy Comprehensive Evaluation

以混凝土为例,采用基于熵权的模糊综合评价模型量化其绿色度,将混凝土绿色度划分为四个等级(优、良、中和差),然后采用比较客观的熵权法确定评价指标权重,建立隶属度矩阵,最后结合加权平均型的模糊综合评价模型计算混凝土绿色度,该方法为评判建材产品绿色度提供一定理论依据和参考价值。通过以兰新铁路第二双线第五标段梁体结构C50高性能混凝土为研究对象,最大隶属度原则为判断依据,采用所提方法得出其混凝土绿色度为中,与原文献结果相吻合。实证分析表明,采用基于熵权的模糊综合评价模型对混凝土进行评价是合理可行的,且计算过程简便,具有一定的实用价值。

Taking concrete as an example,this paper uses the fuzzy comprehensive evaluation model based on entropy weight to quantify its green degree. The green degree of concrete was divided into four grades（ excellent, good, neutralization difference）, then the weights of evaluation indexes were determined by the more objective entropy weighting method,the membership matrix was established,and finally the green degree of concrete was calculated with the fuzzy comprehensive evaluation model in a weighted average way. Taking C50 high performance concrete of one beam structure of the fifth standard section of the second double line of Lanzhou-Sinkiang railway as the research object,and the principle of maximum membership degree as judgment basis,the green degree of the concrete is evaluated as average which is in accordance with the original document result. This empirical analysis shows that it is reasonable and feasible to use the fuzzy comprehensive evaluation model on the basis of entropy weight to evaluate the concrete,and it can also provide a theoretical basis and reference value for assessing the green performance of building materials. Furthermore,the calculation process of this method is much simpler.