基于移动区间关联性趋势的两线三区预警体系研究  

Research on Two⁃line and Three⁃zone Early Warning System Based on Mobile Interval Correlation Trend

作　　者：吴文广 曹成斌 刘兴旺 梅大鹏 刘华[2,3] WU Wenguang;CAO Chengbin;LIU Xingwang;MEI Dapeng;LIU Hua(China Railway Shanghai Group Co.Ltd.,Nanjing 210015,China;China Railway Bridge&Tunnel Technologies Co.Ltd.,Nanjing 210061,China;China Railway Major Bridge Reconnaissance&Design Institute Co.Ltd.,Wuhan 430050,China)

机构地区：[1]中国铁路上海局集团有限公司,南京210015 [2]中铁桥隧技术有限公司,南京210061 [3]中铁大桥勘测设计院集团有限公司,武汉430050

出　　处：《铁道建筑》2021年第12期71-75,共5页Railway Engineering

基　　金：国家重点研发计划(2016YFC0802202);江苏省科学技术厅项目(BE2018049)。

摘　　要：为了准确评估桥梁结构的安全状态,设定科学准确的预警阈值并建立合理的预警体系,以南京大胜关长江大桥运营监测系统为背景,提出基于运营监测数据关联性趋势的预警阈值设定方法,采用关联性趋势分析及概率统计方法建立两线三区预警体系。结果表明:与结构响应数据固定且单一的时程预警指标相比,关联性趋势预警属于综合预警体系,能够充分利用海量监测数据并分析其变化规律;关联性趋势预警阈值随关联性特征变化而变化,动态阈值具有更高的精度和灵敏度,该监测系统能够更科学地实时预警。关联性预警阈值设定方法具有一般性和通用性。In order to accurately evaluate the safety state of the bridge structure,set a scientific and accurate early warning threshold and establish a reasonable early warning system,taking the operation monitoring system of Nanjing Dashengguan Yangtze River Bridge as the background,a method for setting early warning threshold based on the correlation trend of operation monitoring data was proposed,and a two-line and three-zone early warning system was established by using the correlation trend analysis and probability statistics methods.The results show that compared with the stable and single time-history early warning index of structural response data,the correlation trend early warning belongs to the comprehensive early warning system,which can make full use of the massive monitoring data and analyze its change law.The correlation trend early warning threshold changes with the change of the correlation characteristics.The dynamic threshold has higher accuracy and sensitivity.The system can give a more scientific real-time early warning.The method for setting relevance early warning threshold is general and universal.

关 键 词：桥梁 健康监测 数据自诊断 关联性 区间估计 预警阈值 

分 类 号：U448[建筑科学—桥梁与隧道工程]