基于变权集对-可拓耦合模型的脚手架安全评价

Scaffold Safety Evaluation Based on Variable Weight Set Pair-Extension Coupling Model

脚手架安全评价是建筑工程安全管理的重要部分,为准确判断脚手架工程安全等级和等级转变趋势,建立了脚手架变权集对-可拓耦合评价模型。通过变权理论对指标的常权权重进行修正,考虑了评价指标值的水平组态对指标权重的影响;将集对分析和可拓理论相结合,建立了脚手架集对-可拓耦合评价模型,运用三分原理对可拓集合论域进行划分,有效地刻画了评价指标的不确定性并克服了评价中的不相容问题。将该模型应用于某脚手架工程,结果显示:脚手架工程安全等级为Ⅱ级,但略有偏向级的趋势。与传统脚手架安全评估方法相比,评估结果更精确,同时也验证了模型的可行性。

Scaffold safety evaluation is an important part of the safety management of construction engineering.To accurately judge the safety level and level change trend of scaffold engineering,a variable weight set pair-extension coupling evaluation model of scaffold has been established.Considering the influence of the horizontal configuration of the evaluation index value on the index weight,the constant weight of the index is modified by variable weight theory.Combining set pair analysis with extension theory,the scaffolding set pair-extension coupling evaluation model is established.The extension set domain is divided by the three-part principle,which effectively describes the uncertainty of evaluation index and overcomes the incompatibility problem in the evaluation.The model is applied to a scaffold project.The results found that the safety level of the scaffold project is II,but with a slight tendency toward IIl.Compared with the traditional scaffold safety evaluation methods,this evaluation results are more accurate,and the feasibility of the model is also verified.