Multi-level fuzzy comprehensive evaluation approach of construction crane and implementation

Xin Wang, Qilu Huang, S. Gao, Jing Li
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引用次数: 1

Abstract

Construction cranes as major lifting equipments are widely used in infrastructure construction projects. With the number of manufacturers increasing and the series of products becoming more and more complete, the evaluation of their overall performances is becoming a focus point. Moreover, the comprehensive evaluation of the construction crane is a multi-level, multi-factor decision-making process. In this paper, on the basis of fully grasping cranes' performances, a comprehensive index system of construction cranes is established by system engineering analysis method and Delphi method. To evaluate cranes' performances by the proposed index system, a multi-level fuzzy comprehensive evaluation approach is put forward. In this approach, fuzzy numbers are used to quantize the qualitative indices, and combination weighting method based on fuzzy number judgement matrix is presented to determine the weights of indices. Based on analytic hierarchy process (AHP), fuzzy optimal model is built to implement comprehensive evaluation from low level to high level. As one kind of construction cranes, 6 types of truck cranes as an example are evaluated by the proposed index system and approach. The results actually reflect the development trend of truck cranes, and indicate that the indices can fully show the properties of the cranes. Therefore, the reasonability and availability of the proposed index system and approach are illustrated.
工程起重机多层次模糊综合评价方法及实施
建筑起重机作为主要的起重设备,在基础设施建设工程中得到了广泛的应用。随着生产企业数量的增加和产品系列的日益齐全,对其综合性能的评价成为人们关注的焦点。而且,工程起重机的综合评价是一个多层次、多因素的决策过程。本文在充分掌握起重机性能的基础上,运用系统工程分析法和德尔菲法,建立了建筑起重机综合性能指标体系。为了用所提出的指标体系评价起重机的性能,提出了多级模糊综合评价方法。该方法利用模糊数对定性指标进行量化,并提出基于模糊数判断矩阵的组合赋权法确定指标的权重。基于层次分析法(AHP),建立模糊优化模型,实现由低到高的综合评价。作为工程起重机的一种,以6种汽车起重机为例,采用所提出的指标体系和方法对其进行了评价。研究结果较好地反映了汽车起重机的发展趋势,表明该指标能较好地反映汽车起重机的性能。从而说明了所提出的指标体系和方法的合理性和有效性。
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