|Table of Contents|

Comprehensive evaluation of bridge inspection indexes based on entropy weight extension matter-element model(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2022年6期
Page:
42-52
Research Field:
桥梁工程·交通基础设施智能化运维技术专栏
Publishing date:

Info

Title:
Comprehensive evaluation of bridge inspection indexes based on entropy weight extension matter-element model
Author(s):
ZHANG Yang1;  LIU Jia1;  LIANG Pan1;  XIA Zi-li2;  LIANG Peng1
(1. School of Highway, Chang’an University, Xi’an 710064, Shaanxi, China; 2. Hong Kong-Zhuhai-Macao Bridge Authority, Zhuhai 519000, Guangdong, China)
Keywords:
bridge engineering;  evaluation method;  entropy weight extension method;  matter-element model;  bridge detection index;  defect legend;  comprehensive correlation
PACS:
U443.35
DOI:
10.19721/j.cnki.1671-8879.2022.06.005
Abstract:
In view of the problems that current bridge technical condition inspection index was divided too broad and the grading evaluation standard was not intuitive, a subdivision method of inspection index was proposed, the defect legend was introduced into the classification evaluation standard, and a comprehensive evaluation method for the subdivided bridge inspection index was proposed. Firstly, on the basis of summarizing relevant standards at home and abroad, the bridge inspection indexes were subdivided into several secondary inspection indexes, and a grading evaluation standard based on qualitative description, quantitative description and defect legend was established. Secondly, in order to evaluate the subdivided inspection indexes, a comprehensive evaluation method of bridge inspection indexes based on entropy-weight extension matter-element model was proposed. The classical domain was divided and the correlation function was constructed for each secondary inspection index. The entropy weight method was introduced to determine the weight of each secondary inspection index. Then, the comprehensive correlation value of the inspection index about each level was calculated, and the inspection index grades of bridge components and elements were obtained. Finally, this method was applied to the index evaluation case of steel girder corrosion of a cross-sea cable-stayed bridge, and the corrosion was subdivided into three secondary inspection indexes, such as spot rust, general rust and pinpoint rust. Corresponding grading evaluation standards were established, and the entropy-weight extension evaluation model of the corrosion on steel main girder was constructed, and the corrosion index grade of each component and element was obtained through calculation. The results show that the proposed comprehensive evaluation method of bridge inspection indexes based on entropy-weight extension matter-element model can objectively calculate the weight of secondary inspection index, according to the measured value of the inspection index, and can accurately evaluate the inspection index scale of bridge components and elements. The evaluation results are more consistent with the maintenance strategies adopted by the actual bridges, and can be used as input data and useful supplements for the evaluation of bridge technical condition.9 tabs, 2 figs, 29 refs.

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Last Update: 2022-12-20