利用移动主成分分析识别结构损伤  

Structural damage identification using moving principal component analysis

作　　者：李欣 郭恩国 Li Xin;Guo Enguo(Guangzhou Qiyun Real Estate Development Co.,Ltd.,Guangzhou 510770,China;Guangzhou Testing Centre of Construction Quality and Safety Co.,Ltd.,Guangzhou 510440,China)

机构地区：[1]广州市启韵房地产开发有限公司,广东广州510770 [2]广州建设工程质量安全检测中心有限公司,广东广州510440

出　　处：《山西建筑》2021年第14期132-134,137,共4页Shanxi Architecture

摘　　要：针对主成分分析无法连续监测桥梁结构运营状态的问题,利用移动主成分分析识别桥梁结构损伤发生时刻。以简支梁为例,结合数值模拟和实验,分析动力响应数据,验证了该方法的准确性和有效性。仿真和实验结果都表明,利用移动主成分分析可以准确地识别损伤发生时刻,监测出桥梁运行状态下的损伤行为,对土木工程结构的长期监测具有重要意义。Aiming at the problem that principal component analysis cannot continuously monitor the operation state of bridge structure,the moving principal component analysis is used to identify the damage time of bridge structure.Taking a simply supported beam as an example,combined with numerical simulation and experiment,the dynamic response data are analyzed to verify the accuracy and effectiveness of the method.The simulation and experimental results show that the moving principal component analysis can accurately identify the damage time and monitor the damage behavior of the bridge in operation,which is of great significance for the long-term monitoring of civil engineering structures.

关 键 词：随机荷载 损伤识别 结构健康监测 移动主成分分析 

分 类 号：U448.217[建筑科学—桥梁与隧道工程]