基于中心点白化权函数的桥梁技术状况评定

Bridge Technique Condition Assessment Based on Central Point Triangle Whiten Weight Function

目的在现存桥梁技术状况评定的基础上,结合主观与客观多种因素,提出一种可降低主观因素在桥梁评定时产生影响的方法.方法通过自然环境、人类活动和桥梁自身状况三方面指标的序列曲线几何形状,应用灰色关联法分析与桥梁状况指数的紧密性,从而确定各指标所占权重.同时,根据实际值结合中心点三角白化权模型,得到三个方面对应的综合聚类系数,以此判断影响桥梁的主要因素,对技术状况进行综合评定.结果本体系对16年富峰桥技术状况进行评定,由综合聚类表表明自然环境和桥梁自身状况都属于"合格状态",综合聚类数值分别为0. 546 3和0. 372 8.结合该桥三方面影响的权重值0. 189、0. 241、0. 570,综合判定该桥梁属于"合格状态",对原评定结果"不合格状态"进行修正,减少了人为主观在工程评定中的影响.结论利用灰色系统理论对桥梁技术状况进行评定,可以充分考虑影响桥梁状况的多种因素,降低人为主观造成评定时的误差,能够得到更加准确客观3的桥梁技术状况评定结果.

Based on the assessment of existing bridge technology status,combined with subjective and objective factors,this paper proposed a method to reduce the influence of subjective factors on bridge assessment. Through the sequence curve geometry of the natural environment,human activities and the status of the bridge itself,the gray correlation method is used to analyze the tightness of the bridge condition index,so as to determine the weight of each indicator. At the same time,according to the actual value and the central point triangle whitening weight model,the comprehensive clustering coefficients corresponding to the three aspects are obtained,so as to judge the main factors affecting the bridge and comprehensively evaluate the technical status. This system evaluates thetechnical status of Fufeng Bridge in 2016,the comprehensive clustering table shows that the natural environment and the bridge itself are in the 'qualified state',and the comprehensive clustering values are 0. 546 3 and 0. 372 8 respectively. Combined with the weight values of the three aspects of the bridge,the factors are 0. 189,0. 241,and 0. 570. The bridge could be comprehensively judged to belong to the ' qualified state',that correct the original evaluation result ' unqualified state',which reduces the influence of human subjectivity in engineering evaluation. Using gray system theory to evaluate the technical status of bridges,we can fully consider the various factors affecting the condition of bridges,reducing the error caused by the human subjective assessment,and obtain more accurate and objective evaluation of the bridge technology status.