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Studies on the Relationship Between Anchor Force of Prestressed Anchor Cable and Nonlinear Vibration of Anchor Head
In order to ensure the normal operation of prestressed anchor cable, the detection of anchor force is a very important link in the health detection of prestressed anchor cable. By analyzing the relationship between nonlinear vibration characteristics and anchoring force, this paper explores the nondestructive testing method of anchoring force. The concrete workbench was used to simulate the soil anchored by the anchor cable. Under the condition of maintaining the tension at all levels by the pull-out apparatus, the lateral excitation was carried out at the anchor head of the anchor cable, and the free vibration acceleration signal of this part was recorded. The first-order frequency signal was decomposed by AMD, and Hilbert transform was performed on it to obtain the relationship between the frequency, amplitude and time of the signal, and then the frequency-amplitude curve reflecting the nonlinear vibration characteristics was obtained. The same amplitude segment is selected on the frequency-amplitude curve, and the corresponding frequency difference is used as the nonlinear index to analyze the relationship between the tension (anchoring force) and the nonlinear vibration degree of each level. The test and analysis results show that the degree of nonlinear vibration decreases with the decrease of anchorage force. Therefore, the nonlinear index can be used to judge the anchoring force of anchor cable.
Studies on the Relationship Between Anchor Force of Prestressed Anchor Cable and Nonlinear Vibration of Anchor Head
In order to ensure the normal operation of prestressed anchor cable, the detection of anchor force is a very important link in the health detection of prestressed anchor cable. By analyzing the relationship between nonlinear vibration characteristics and anchoring force, this paper explores the nondestructive testing method of anchoring force. The concrete workbench was used to simulate the soil anchored by the anchor cable. Under the condition of maintaining the tension at all levels by the pull-out apparatus, the lateral excitation was carried out at the anchor head of the anchor cable, and the free vibration acceleration signal of this part was recorded. The first-order frequency signal was decomposed by AMD, and Hilbert transform was performed on it to obtain the relationship between the frequency, amplitude and time of the signal, and then the frequency-amplitude curve reflecting the nonlinear vibration characteristics was obtained. The same amplitude segment is selected on the frequency-amplitude curve, and the corresponding frequency difference is used as the nonlinear index to analyze the relationship between the tension (anchoring force) and the nonlinear vibration degree of each level. The test and analysis results show that the degree of nonlinear vibration decreases with the decrease of anchorage force. Therefore, the nonlinear index can be used to judge the anchoring force of anchor cable.
Studies on the Relationship Between Anchor Force of Prestressed Anchor Cable and Nonlinear Vibration of Anchor Head
Lecture Notes in Civil Engineering
Strauss, Eric (editor) / Li, Hao (author) / Cao, Hui (author)
International Conference on Civil Engineering ; 2022 ; Singapore, Singapore
2022-08-09
11 pages
Article/Chapter (Book)
Electronic Resource
English
Prestressed anchor cable , Nonlinear vibration characteristics , Anchoring force , Nondestructive testing , AMD decomposition Engineering , Civil Engineering , Building Materials , Mechanical Engineering , Waste Management/Waste Technology , Geoengineering, Foundations, Hydraulics , Environment, general
STRESS AND DEFORMATION ADJUSTABLE INNER ANCHOR HEAD OF UNBONDED PRESTRESSED ANCHOR CABLE
| European Patent Office | 2020