Analyzing these risk factors in depth which cause scaffolding collapse, we make a comprehensive evaluation for the safety of fastener steel-tube scaffold. During evaluating the safety of fastener steel-tube scaffold, the quantitative analysis of mechanical calculation is used in the fuzzy comprehensive evaluation. The perfect combination which integrate quantitative analysis and qualitative analysis together make a scientific and rational result of the evaluation. And this will provide some theoretical guidance for the construction in the future. The study shows that the method which is used to study the safety of fastener steel-tube scaffold integrating mechanical calculation and fuzzy comprehensive evaluation together takes on good reliability. The fuzzy comprehensive evaluation integrating quantitative analysis and qualitative analysis together takes on good practicability.%在分析引起脚手架发生坍塌的主要因素的基础上,对扣件式钢管脚手架的安全性进行综合评价.而且在评价过程中,将力学计算中的定量分析运用到模糊综合评价中,使定量分析与定性分析两者相结合,这样将使得评价结果更加科学合理,也可为将来的工程建设提供更为重要的理论指导.通过研究表明,将模糊综合评价与力学计算分析相结合来研究扣件式钢管脚手架的安全性,具有很好的可靠性；而且模糊综合评价法使定量分析与定性分析相结合,具有很好的实用性.
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