Distributed monitoring of deformation of PCC pile under horizontal load using OFDR technology

Abstract

To study the horizontal bearing behavior of cast-in-place concrete (PCC) pipes, a horizontal static load model test is conducted based on the optical frequency domain reflectometry (OFDR) technology. The deformation distribution in the pile is studied. Results show that the pile moment increases with the horizontal load, whereas the position of the maximum point of moment is roughly unchanged. Moreover, the calculated and measured values of horizontal displacement at the pile top are compared; results show that the values are in agreement, which demonstrates that the deformation of a PCC pile can be successfully measured using the OFDR technology.

Field Test Study on Deformation Monitoring of Antifloating Anchor Using Optic Fiber Sensor

“…The use of thresholding allows the signal coefficients to be retained while reducing most of the noise coefficients to zero. For the wavelet coefficients with high resolution at each scale, the wavelet coefficients of the observed signal data are processed by setting the threshold and threshold function, and the processed wavelet coefficients are subjected to inverse wavelet transform to obtain the reconstructed signal for the purpose of denoising [23][24][25][26][27].…”