Effect of Tensile Load for Detecting Broken Wires of Parallel Wire Cable Based on Guided Waves

2013 ◽  
Vol 325-326 ◽  
pp. 848-851
Author(s):  
Bo Ming Wu ◽  
Ji Dong Zhang ◽  
Jian Dong Zhang ◽  
Cong Ming Zhu ◽  
Xin Jun Wu ◽  
...  
Keyword(s):  
Guided Waves ◽  
Tensile Load ◽  
Condition Assessment ◽  
Parallel Wire ◽  
Bridge Safety ◽  
Parallel Wire Cable

Condition assessment of cables has gained more attention for the bridge safety. The cable is under tensile load in service. The effect of tensile load for detecting broken wires on parallel wire cable based on guided waves is investigated. The sample cable with broken wires under several levels of tensile load is detected using guided waves based on the magnetostrictive effect. The amplitude of flaw echo increases monotonically with the increasing of tension. The results indicate that the tensile load brings benefit for detecting broken wires in the parallel wire cable.

Analysis and Experiments on the Secondary Stresses of the Parallel Wire Cable in Suspension Bridge

2013 ◽  
Vol 101 (18) ◽  
pp. 1-4
Author(s):  
Minjae Lee ◽  
Jonghoon Moon ◽  
Jahgeol Yoon ◽  
Ho-Kyung Kim
Keyword(s):  
Suspension Bridge ◽  
Parallel Wire ◽  
Parallel Wire Cable

Scattering Matrix Approach to Informing Damage Monitoring and Prognosis in Composite Bolted Connections

2013 ◽  
Vol 558 ◽  
pp. 314-322
Author(s):  
Colin Haynes ◽  
Takeaki Nadabe ◽  
Nobuo Takeda ◽  
Michael D. Todd
Keyword(s):  
Guided Waves ◽  
Fiber Composite ◽  
Tensile Load ◽  
Propagation Distance ◽  
Ultrasonic Waves ◽  
Reinforced Polymer ◽  
Extent Of Damage ◽  
Processing Techniques ◽  
Work Done

Structural health monitoring refers to the process of making an assessment, based on nondestructive, in-situ, autonomous measurements, about the ability of a structure to perform its intended function. This paper presents work done on a bolted connection in carbon-fiber reinforced polymer composite materials. A composite specimen is bolted in a double lap joint configuration to a test apparatus that applies an increasing tensile load. Ultimately, the load results in bearing failure of the material around the bolt hole. To monitor the progression of damage, macro fiber composite sensors are bonded in a circular array around the bolt hole. These sensors are then used to generate ultrasonic guided waves, a popular technique in nondestructive evaluation because of the favorable combination of propagation distance and sensitivity to damage. As the specimen is subjected to increasing load levels, measurements are taken repeatedly and compared with one another. Because damage will change the local mechanical properties of the material, the ultrasonic waves passing through the damaged region will be scattered differently in each direction, resulting in a different waveform arriving at the other surrounding sensors. By applying appropriate signal processing techniques, these changes may be interpreted as indicating the extent of damage that has occurred in the specimen. Preliminary analysis is presented demonstrating the correlation between changes in received strain signals and increasing damage levels.

Fatigue Properties Assessment of Corroded Cable

2009 ◽  
Vol 413-414 ◽  
pp. 757-764 ◽  
Author(s):  
Cheng Ming Lan ◽  
Hui Li
Keyword(s):  
Monte Carlo ◽  
Fatigue Life ◽  
Fatigue Test ◽  
Fatigue Properties ◽  
Test Results ◽  
Original Design ◽  
Parallel Wire ◽  
Parallel Wire Cable ◽  
As Stress ◽  
Wire Fatigue

Based on fatigue test results of corroded wires obtained from dissection of actual parallel wire cables which were used on a certain domestic cable-stayed bridge, the fatigue properties of corroded parallel wire cable are investigated by the method of Monte Carlo simulation in this paper. The results of fatigue life and corrosion degree of corroded wire are presented. Comparisons between the original design information and fatigue test results, it can be seen that corrosions make the fatigue lives of wires decreasing sharply. The fatigue life of individual wire is described by Weibull distribution considered some useful parameters such as, stress range, mean stress, mean static strength and length effects. The effects of percentage of broken wire, cable S-N curve parameter on cable fatigue life are discussed. It can be seen that the cable fatigue lives are controlled by a small fraction of the cable wires with the shortest fatigue lives. Finally, the S-N curves of cable are calculated by Monte Carlo simulations based on the results of individual wire fatigue test, and compared with the results of cable fatigue test.

New Parallel Wire Cable Tether Study for Deepwater TLP

1987 ◽  
Author(s):  
H. Okamura ◽  
J. Inoue ◽  
Y. Hajima ◽  
Y. Takeshi ◽  
H. Okubo
Keyword(s):  
Parallel Wire ◽  
Parallel Wire Cable

Aspects of parallel wire cable reliability

2003 ◽  
Vol 25 (2) ◽  
pp. 201-225 ◽  
Author(s):  
M.H. Faber ◽  
S. Engelund ◽  
R. Rackwitz
Keyword(s):  
Parallel Wire ◽  
Parallel Wire Cable
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