Investigation of the interwire energy transfer of elastic guided waves inside prestressed cables

Treyssède, Fabien

doi:10.1121/1.4955080

Cited by 17 publications

(10 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where m is the number of samples. Then, the signal S can be defined as: (13) in which, Ei is the energy of corresponding decomposition signal and is described as:…”

Section: Detection Principle For Wedge Anchorage-connected Structuresmentioning

confidence: 99%

“…Meanwhile, most of the measurement sensors have a limited life span and cannot be replaced later or the replacement process is complex. In recent years, with the development of research on the propagation characteristics of an ultrasonic guided wave in a steel strand, the correlation between the propagation characteristics of the guided wave in the steel strand and the axial tension has been gradually explored [11][12][13][14][15]. Based on the simplified wire-to-wire contact model, Treyssède [16] used a semi-analytic finite element method to obtain the dispersion curve of the guided wave in the steel strand.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tension Monitoring of Wedge Connection Using Piezoceramic Transducers and Wavelet Packet Analysis Method

Zhang

Liu

et al. 2020

Sensors

View full text Add to dashboard Cite

A steel strand is widely used in long span prestressed concrete bridges. The safety and stability of a steel strand are important issues during its operation period. A steel strand is usually subjected to various types of prestress loss which loosens the anchorage system, negatively impacting the stability of the structure and even leading to severe accidents. In this paper, the authors propose a wavelet packet analysis method to monitor the looseness of the wedge anchorage system by using stress wave-based active sensing. As a commonly used piezoceramic material, lead zirconate titanate (PZT) is employed with a strong piezoelectric effect. In the proposed active sensing approach, PZT patches are used as sensors and actuators to monitor the steel strand looseness. The anchorage system consists of the steel strand, wedges and barrel, which forms two different direct contact surfaces to monitor the tension force. PZT patches are pasted on the surface of each steel strand, corresponding wedge and barrel, respectively. Different combinations of PZTs are formed to monitor the anchoring state of the steel strand according to the position of the PZT patches. In this monitoring method of two contact surfaces, one PZT patch is used as an actuator to generate a stress wave and the other corresponding PZT patch is used as a sensor to detect the propagated waves through the wedge anchorage system. The function of these two PZTs were exchanged with the changing of transmission direction. The wavelet packet analysis method is utilized to analyze the transmitted signal between PZT patches through the steel strand anchorage system. Compared with the wavelet packet energy of received signals under different PZT combinations, it could be found that the wavelet packet energy increased with the increasing of anchorage system tightness. Therefore, the wavelet packet energy of received signal could be used to monitor the tightness of the steel strand during operation. Additionally, the wavelet packet energy of the received signals are different when the same PZT combination exchanges the energy transfer direction. With the comparison on the received signals of different combinations of PZTs, the optimal energy transfer path corresponding to different contact surfaces of the steel strand could be determined and the optimal experimental results are achieved.

show abstract

“…where m is the number of samples. Then, the signal S can be defined as: (13) in which, Ei is the energy of corresponding decomposition signal and is described as:…”

Section: Detection Principle For Wedge Anchorage-connected Structuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tension Monitoring of Wedge Connection Using Piezoceramic Transducers and Wavelet Packet Analysis Method

Zhang

Liu

et al. 2020

Sensors

View full text Add to dashboard Cite

show abstract

“…The nonlinearity was shown to be strongest at lower stresses (<35% UTS), which is within the range of stress studied here. In the frequency range studied in this paper, the fundamental mode has been shown to have a high degree of energy leakage between adjacent wires ( 21 ). This weakens the idealization of modeling each wire as a rod waveguide with free boundaries, resulting in the significant discrepancy observed between the experimental points and the rod theory in Figure 7.…”

Section: Resultsmentioning

confidence: 99%

Stress Measurement in Seven-Wire Strands using Higher Order Guided Ultrasonic Wave Modes

Dubuc

Ebrahimkhanlou

Salamone

2018

Transportation Research Record: Journal of the Transportation R

View full text Add to dashboard Cite

This paper investigates the use of higher order longitudinal guided modes for stress measurement within individual wires of a steel strand. The effect of stress on the phase velocity of higher order modes is studied using an approximate theory, which does not require the solution of dispersion curves. To validate the proposed approach, a prestressing bed was designed to apply a tensile load to a strand up to 25% ultimate tensile strength while recording guided wave signals. Guided waves were excited within individual wires of a strand, and the stress sensitivity of their phase velocity was used for stress measurement. Stress measurement was performed with higher order modes using the approximate theory with parameters for a steel of similar carbon content (Hecla 17), as well as with calibrated parameters. Using the Hecla 17 parameters, roughly 15% mismatch in stress was observed, whereas roughly 5% error was observed using calibrated parameters. Stress measurement was also performed using the fundamental mode, in order to compare the accuracy of higher order modes with the mode used previously in the literature. The greater stability of higher order modes across mode and frequency yielded significantly increased stress measurement accuracy, using both Hecla 17 and calibrated parameters.

show abstract

“…The existing studies mainly focused on two aspects. On the one hand, the influence of tensile force on the propagation characteristics of guided waves was studied [10][11][12][13][14][15][16][17][18]. These features such as the notch frequency, the higher order group velocity, and the relative velocity variation could be employed to measure the force.…”

Section: Introductionmentioning

confidence: 99%

Effect of Tensile Force on Magnetostrictive Sensors for Generating and Receiving Longitudinal Mode Guided Waves in Steel Wires

Chen

2019

Journal of Sensors

View full text Add to dashboard Cite

When the longitudinal mode guided waves based on magnetostrictive effect were employed to inspect the bridge cables, we found that there was a large difference in the signal’s amplitude of the same specification cable under different tensile force. This difference would affect the test results and the identification of defects. It is necessary to study the effect of tensile force on the signal for the reliability of detection. Firstly, the effective field theory is employed to take the force as an additional bias magnetic field. Then, the effect of the tensile force on generating and receiving longitudinal mode guided waves based on magnetostrictive effect is obtained by the relationship between the bias magnetic field and the magnetostrictive coupling coefficient. Finally, the experiment of the magnetostrictive sensor is carried out on a Φ5 mm steel wire under different force. The experimental results are in good agreement with the theoretical results. The results show that the existence of the tensile force would change the operation point for generating and receiving the longitudinal mode guided waves based on magnetostrictive effect, which associated with the coupling coefficient. In order to obtain the optimal conversion efficiency for the force state wire and cable, the applied bias magnetic field should be set smaller than the bias magnetic field for the force-free state.

show abstract

Investigation of the interwire energy transfer of elastic guided waves inside prestressed cables

Cited by 17 publications

References 33 publications

Tension Monitoring of Wedge Connection Using Piezoceramic Transducers and Wavelet Packet Analysis Method

Tension Monitoring of Wedge Connection Using Piezoceramic Transducers and Wavelet Packet Analysis Method

Stress Measurement in Seven-Wire Strands using Higher Order Guided Ultrasonic Wave Modes

Effect of Tensile Force on Magnetostrictive Sensors for Generating and Receiving Longitudinal Mode Guided Waves in Steel Wires

Contact Info

Product

Resources

About