Detection and Cause Analysis of Expressway Viaduct Disease Based on Non-destructive Testing
In the non-destructive testing of expressway viaduct diseases,after selecting a suitable ultrasonic sensor,the sensor is placed at the bottom or side of viaduct,and the ultrasonic signal received by the sensor is recorded by the controller.Due to the possi-bility of clutter and noise in the ultrasonic signals obtained by sensors,filtering is required after the centralized procurement price sig-nal.Analysis of the treated signals identified the potential location and type of the disease.Based on ultrasonic non-destructive testing and signal analysis results,a comprehensive analysis is conducted on the causes of diseases in expressway viaduct from multiple aspects such as concrete quality,construction quality,and environmental factors.In the example results,there are subtle differences between the measured and theoretical frequencies of different mode orders.The measured frequency of the first order mode is 1.23 Hz,while the theoretical frequency is 1.21 Hz;the measured frequency of the third order mode is 6.78 Hz,while the theoretical frequency is 6.80 Hz.These differences can determine whether the bridge has a disease and its severity.
万方数据
维普
