Experimental Study on the Cable Tension Based on Non-Contact Dynamic Deflection Equipment
American Journal of Mechanics and Applications
Volume 8, Issue 2, June 2020, Pages: 25-32
Received: Oct. 15, 2020; Published: Oct. 17, 2020
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Authors
Zhenhua Dong, Research Institute of Highway Science of Transport Ministry, Beijing, China; Key Laboratory of Old Bridge Inspection and Reinforcement Technology Industry, Beijing, China
Jinquan Zhang, Research Institute of Highway Science of Transport Ministry, Beijing, China; Key Laboratory of Old Bridge Inspection and Reinforcement Technology Industry, Beijing, China
Pengfei Li, Research Institute of Highway Science of Transport Ministry, Beijing, China; Key Laboratory of Old Bridge Inspection and Reinforcement Technology Industry, Beijing, China
Yan Mao, Research Institute of Highway Science of Transport Ministry, Beijing, China; Key Laboratory of Old Bridge Inspection and Reinforcement Technology Industry, Beijing, China
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Abstract
For the contact and wired measurement technology of cable tension, the factors of complicated bridge site conditions, data acquisition and transmission, wave data processing and sensor contact should be considered in practical application, which affect seriously the measure result accuracy, work efficiency and the measure feasibility. In order to improve the limitation of the existing cable tension measurement technology, the feasibility and key factors of non-contact dynamic deflection measurement technology is studied. A cable specimen with length of 12m was designed and made, and the steel strand is used in it, and the non-contact vibration testing device is used. The frequency and tension of the cable and the strain of steel strands are analyzed, and the results show that the effect of measure target position on the fundamental frequency of the cable is obviously little, and the tension of the subsequent steel strand can decrease the tension strain of the stretched steel strand, that is, the tension of the stretched steel strand is reduced. Furthermore, the maximum difference between calculated and measured tension of the cable is about 17.7% during loading stage. When the unloaded cable tension is less than 20.6%, the difference between calculated and measured tension is less than 10.0%. It can be seen that the tension and tension loss of the cable can be accurately estimated by using the non-contact dynamic deflection technology, and it can improve the work efficiency and the measure feasibility due to the less measure targets and larger data transmission distance.
Keywords
Cable, Tension, Dynamic Test, Non-contact Dynamic Deflection Test, Fundamental Frequency
To cite this article
Zhenhua Dong, Jinquan Zhang, Pengfei Li, Yan Mao, Experimental Study on the Cable Tension Based on Non-Contact Dynamic Deflection Equipment, American Journal of Mechanics and Applications. Vol. 8, No. 2, 2020, pp. 25-32. doi: 10.11648/j.ajma.20200802.11
References
[1]
Z F. Wang. Study on fiber brag grating sensing theory and key technology for bridges and tunnel engineering safety monitoring [D]. Shandong University, 2014. In Chinese.
[2]
J X. Li, X J. Qiang, X W. Lang. Design and implementation of clinometer based on fiber brag grating [J]. Piezoelectric and Acousto-optic, 2019, 41 (01): 53-56. In Chinese.
[3]
A S. Kurkov, V I. Karpov, A Y. Laptev et a1. Highly efficient cladding-pumped fibre laser based on an ytterbium-doped optical fibre and a fibre Bragg grating [J]. Quant. Electron. 1999, 29 (6): 516-517.
[4]
Z H. Liu, Y Q. Pan, YY. Ge. Damage analysis of reinforced all-lightweight concrete beams based on AE parameters [J]. Concrete, 2018 (10): 52-56+61. In Chinese.
[5]
R. Mohammed. An insight into the NDT of steel cables by acoustic emission [C]. Science and Technology: Proceedings of the 14th World Conference on Non-Destructive Testing. New Delhi: Pennsylvania State University, 1996: 201-210.
[6]
P O. Paulson. Continuous acoustic monitoring of suspension bridges and cable stays [C]. Structural Materials Technology III. San Antonio: SPIE Society of Photo-Optical Instrumentation Engineers, 1998: 205-213.
[7]
D S. Li, J P. Ou. Acoustic emission characteristics and damage evolution model of steel strands in tensile test [J]. Journal of Highway and Transportation Research and Development, 2007, 24 (9): 57-60. In Chinese.
[8]
L L. Tian. Research on magnetic optic image nondestructive testing technology for defects of conductive material [D]. Electronic Science and Technology of China, 2018. In Chinese.
[9]
R. Christen, A. Bergamini, M. Motavalli. Three-dimensional localization of defects in stay cables using magnetic flux leakage methods [J]. Journal of Nondestructive Evaluation, 2003, 22 (3): 93-101.
[10]
G S. Park, E S. Park. Improvement of the sensor system in magnetic flux leakage-type nondestructive testing. IEEE Transactions on Magnetics. 2002, 38 (2): 1277-1280.
[11]
W M Yan, X J Xu, Y. Li, et al. Cable force measurement based on vibration frequency method and optimization function [J]. Journal of Highway and Transportation Research and Development, 2015, 32 (11): 61-67. In Chinese.
[12]
W F. Wang, Y F. Xu, D Q. Han et al. Techniques for Cable Force Measurement During Construction of Yamen Bridge [J]. Bridge Construction, 2003 (1): 23-26. In Chinese.
[13]
W Y. Zhu, H Y. Qin, J Z. Li et al. Monitoring cable force of FAST project based on fiber bragg grating sensor external installed on anchorage zone [J]. Journal of Mechanical Engineering, 2017, 53 (17): 23-30. In Chinese.
[14]
J S. Jiang, G W. Tang, H P. Liang. Design of cable tension measurement system based on vibration frequency method [J]. Journal of Chongqing Transportation University (Natural Science), 2015, 34 (5): 25-28. In Chinese.
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