Force monitoring of Galfan cables in a long-span cable-truss string-support system based on the magnetic flux method

Zhang, Yuxin; Tian, Xiang; Xia, Juwei; Zhang, Hexin

Abstract

Magnetic flux sensors are commonly used in monitoring the cable force, but the application of the sensors in large diameter non-closed Galfan cables, as those adopted in Yueqing Gymnasium which is located in Yueqing City, Zhejiang Province, China and is the largest span hybrid space structure in the world, is seldom done in engineering. Based on the construction of Yueqing Gymnasium, this paper studies the cable tension monitoring using the magnetic flux method across two stages, namely, the pre-calibration stage before the cable leaves the rigging factory and the field tension formation stage of the cable system. In the pre-calibration stage in the cable factory, a series of 1:1 full-scale comparative tests were carried out to study the feasibility and relability of this kind of monitoring method, and the influence on the monitoring results of charging and discharging voltage, sensor location, cable diameter and fitting method were also studied. Some meaningful conclusions were obtained. On this basis, the real-time cable tension monitoring system of the structure based on the magnetic flux method is established. During the construction process, the monitoring results of the cables are in good agreement with the data of the on-site pressure gauge. The work of this paper will provide a useful reference for cable force monitoring in the construction process of long-span spatial structures.

Citation

Zhang, Y., Tian, X., Xia, J., & Zhang, H. (2023). Force monitoring of Galfan cables in a long-span cable-truss string-support system based on the magnetic flux method. Structural Monitoring and Maintenance, 10(3), 261-281. https://doi.org/10.12989/smm.2023.10.3.261

• Journal Article Type: Article
• Acceptance Date: Sep 20, 2023
• Online Publication Date: Sep 25, 2023
• Publication Date: 2023-09
• Deposit Date: Dec 3, 2023
• Print ISSN: 2288-6605
• Electronic ISSN: 2288-6613
• Publisher: Techno-Press
• Peer Reviewed: Peer Reviewed
• Volume: 10
• Issue: 3
• Pages: 261-281
• DOI: https://doi.org/10.12989/smm.2023.10.3.261
• Keywords: cable tension monitoring; cable-truss string-support system; Galfan cable; long-span spatial structures; magnetic flux sensor
• Public URL: http://researchrepository.napier.ac.uk/Output/3402808