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Structural condition assessment of reinforced-concrete bridges based on acoustic emission and strain measurements
Journal of Civil Structural Health Monitoring ( IF 4.4 ) Pub Date : 2020-09-05 , DOI: 10.1007/s13349-020-00433-0
Imane Bayane , Eugen Brühwiler

A reliable novel monitoring approach is developed to assess the structural condition of reinforced-concrete bridge elements. The approach is based on combining acoustic emission technique and strain gauge measurements, and it is illustrated by a case study of a composite steel–concrete viaduct in service since 1957. Monitoring was performed on its reinforced-concrete deck slab under traffic and environmental loading for one year. The monitoring setup and procedure are presented. The variation of acoustic emission signals is evaluated regarding strain and temperature measurements. Parametric study, pencil-break test, statistical analysis, crack classification and b-value analysis are performed to assess the structural condition. The acoustic emission activity of the reinforced-concrete slab is evaluated for 1 year under operational conditions. From the monitoring approach, it was possible to identify the nature of the cracking activity in the concrete slab as a function of traffic loading and temperature and to assess in time the condition of the slab-girder connection.



中文翻译:

基于声发射和应变测量的钢筋混凝土桥梁结构状态评估

开发了一种可靠的新型监测方法来评估钢筋混凝土桥梁构件的结构状况。该方法基于结合声发射技术和应变仪测量的结果,并以1957年以来投入使用的钢-混凝土复合高架桥为例进行了说明。在交通和环境负荷下,对其钢筋混凝土桥面板进行了监测。一年。介绍了监视设置和过程。关于应变和温度测量评估声发射信号的变化。参数研究,铅笔断裂测试,统计分析,裂缝分类和b进行值分析以评估结构条件。在运行条件下,对钢筋混凝土楼板的声发射活性进行了一年的评估。通过监测方法,可以确定混凝土板中裂缝活动的性质与交通荷载和温度的关系,并及时评估板梁连接的状况。

更新日期:2020-09-07
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