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| Evaluation of cracking condition for CRTS Ⅲ prefabricated slab track based on interval analytic hierarchy process |
Juan-juan REN1,2( ),Kuan LIU1,2,Wei-hua WANG3,Ying ZHANG1,2,Ke-xin YANG1,2,Ming-ming LIU1,2 |
1. MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu 610031, China
2. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
3. China Railway Design Group Limited Company, Tianjin 300308, China |
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Abstract The slab track cracking condition index for CRTS Ⅲ prefabricated slab track and the calculation methods were proposed to realize the cracking management, and aiming at the multi-cracks in a variety of cracking forms 437 valid questionnaires were obtained through expert consultation, and the Delphi method and interval analytic hierarchy process were used to establish the structural hierarchy to determine the weight of each parameter. After that the evaluation method proposed was applied based on engineering examples. Results show that the weights of parameters obtained by the comprehensive method combining the Delphi method and the interval analytic hierarchy process are more objective, compared with only using analytic hierarchy process. Furthermore, the slab track cracking condition index CCI was 75.30 points in the engineering example, which verified the rationality of the evaluation method. In short, the calculation results of the engineering example show that the evaluation method proposed can quantitatively analyze the cracking severity of the slab bed.
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Received: 10 February 2021
Published: 31 December 2021
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| Fund: 国家重点研发计划资助项目（2021YFF0502100）；国家自然科学基金资助项目（52022085）；四川省青年科技创新研究团队项目（22CXTD0051） |
基于区间层次分析的CRTS Ⅲ型板式无砟轨道开裂状况评估
为了实现对CRTS Ⅲ型板式无砟轨道开裂的伤损管理，提出针对多条不同开裂形式裂缝的CRTS Ⅲ型板式无砟轨道开裂状况评价指标和计算方法. 通过专家咨询获取437份有效调查问卷，采用德尔菲法和区间层次分析建立结构层次以确定各参数的权重，并将所提评估方法应用于工程实例. 结果表明：与层次分析法相比，结合德尔菲法和区间层次分析求取的参数权重更具客观性；工程实例中的开裂状况评价指标CCI为75.30分，评估方法的合理性得以验证，工程实例计算结果表明所提评估方法能够定量分析无砟道床的开裂严重程度.
关键词：
CRTS Ⅲ型板式无砟轨道,
开裂状况指标,
德尔菲法,
区间层次分析
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