一种单层工业厂房上部承重结构体系可靠性评定方法

Reliability evaluation method for upper load-bearing structural system of single-layer industrial plant

中文关键词: 单层工业厂房  上部承重结构  可靠性  层次分析法  灰色聚类分析

英文关键词: single-story industrial building  upper load-bearing structure  reliability  analytic hierarchy process  grey clustering analysis

中文摘要:

      为评定单层工业厂房上部承重结构可靠性，提出了一种将层次分析法（AHP）与灰色聚类分析法相结合的可靠性等级评估方法。依据《工业建筑可靠性鉴定标准》（GB50144-2008）相关规定，提出采用承载能力、结构整体性、使用状况、结构水平位移作为灰色聚类分析的聚类指标，并采用层次分析法确定各指标对结构体系可靠性影响的权重；采用层次分析法，充分考虑构件的位置、类型对上部承重结构可靠性的影响程度差异，确定构件权重系数，评定上部承重结构承载功能等级；提出聚类指标灰类等级划分标准，并根据厂房现状及承载能力验算结果，为聚类指标赋予白化数；通过聚类分析，构造聚类向量，按最大隶属度原则，确定结构体系可靠性等级及隶属度。经过工程实例验证，依据本文所提方法所得评定结果，与《工业建筑可靠性鉴定标准》（GB50144-2008）评定结果一致，能够满足工程实际的应用。

英文摘要:

      In order to evaluate the reliability of the upper load-bearing structure of single-story industrial buildings, a reliability evaluation method combining the analytic hierarchy process (AHP )and grey cluster analysis is proposed. According to the relevant regulations of ‘Industrial Building Reliability Appraisal Standard (GB50144-2008)’, it is proposed to adopt the bearing capacity, structural integrity, use status and structural horizontal displacement as the clustering index of gray cluster analysis, and use AHP to determine the weight of the influence on the reliability of the structural system of each index; AHP is used to fully consider the different influence of the location and type of the component on the reliability of the upper load-bearing structure to determine the weight coefficient of the component and evaluate the carrying capacity level of the upper load-bearing structure; According to the classification standard of the class and the calculation result of the carrying capacity, the whitening number is assigned to the clustering index. The clustering vector is constructed by clustering analysis, and the reliability level and membership degree of the structural system are determined according to the principle of maximum membership degree. After verification by engineering examples, the evaluation results obtained according to the method proposed in this paper are consistent with the evaluation results of ‘Industrial Building Reliability Appraisal Standard’(GB 50144-2008), which can meet the practical application of the project.