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《Journal of Earthquake Engineering and Engineering Vibration》 2009-02
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Study on optimal placement of acceleration sensors for health monitoring of a long-span continuous rigid-frame bridge

ZONG Zhouhong1,SUN Jianlin1,2,XU Liqun1,LI Jiawei1(1.College of Civil Engineering,Fuzhou University,Fuzhou 350108,China;2.Headquarters of Expressway Construction in Fujian Province,Fuzhou 350001,China)  
In this paper,a long-span continuous rigid frame bridge with span arrangement of 145+2×260+145m was selected as an engineering background.Firstly,the selection methods of acceleration sensor position were briefly introduced,considering the optimal placement algorithm and the evaluation criterion,and secondly,a three-dimensional finite element(FE) model of the bridge was constructed,and the field ambient vibration testing was conducted,then,the dynamic characteristics of the bridge were extracted from the FE analysis and the testing.Thirdly,the optimal placement scheme of acceleration sensors for the bridge health monitoring was studied,on the basis of the MAC matrix and standard of Fisher's information matrix.Finally,the optimal placement scheme of acceleration sensors was presented according to the real damage condition of the bridge.The real time monitoring results indicate that the first 10 orders of vibration frequencise and modal shapes can be extracted and the scheme can meet the needs of the bridge's long-term health monitoring.
【Fund】: 福建省高等学校新世纪优秀人才支持计划项目(TW2006-29);; 福建省科技三项(2006F5001);; 福州大学科技发展基金联合资助(2006-XQ-29)
【CateGory Index】: U446.2
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