Dynamic Forces Measurement of Cables in Structural Health Monitoring
- 建筑土木－会议论文 
Now a day, cable plays a more and more important role in civil engineering. As an effective construction member, cable is used in many long-span spatial structures. The cable tension measurement is required in the construction control, assessment and long-term monitoring of cable-supported structures. Mostly, the detection uses the Fourier Transform to get the frequencies of the cable, and then applies the vibration-based cable tension theory to evaluate the cable tension. As a conventional method for cable tension measurement, the Fourier Transform can only be used in the static cable tension force test, but not dynamic cable tension test. The cable dynamic tension describes the load-deformation behavior of cables subjected to dynamic loading. It represents the intrinsic dynamic properties of cables. In order to get the dynamic cable force, time-frequency analysis must be done. In this paper, wavelet transform tool is used to analyze the signal, and obtain the cable tension dynamic change along with the time.