Strand Tension Control in Anchor Span for Suspension Bridge Using Dynamic Balance Theory

Wang, Da; Zhang, Wei; Liu, Yongming; Liu, Yang

doi:10.1590/1679-78252519

Cited by 7 publications

(2 citation statements)

References 12 publications

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“…There are several approaches to measure the tension forces of individual strands. Firstly, the tension forces can be derived from the measured basic frequencies of individual cable strands [ 10 , 11 ]. Such a method was inspired by the vibration-based tension identification theories for stayed cables [ 12 ] and was used to control the tension forces of the strands during the construction period.…”

Section: Introductionmentioning

confidence: 99%

“…Then the mapping relationships between vibration frequencies and the tension forces of the strands in the anchor span were derived by finite element analysis. Wang et al [ 11 ] further improved the formula linking the vibration frequency with tension force of the anchor span strands by considering the influence of the anchor device. Recently, vision sensors have used to identify cables’ dynamic characteristics and then the tension forces of the cables can be estimated [ 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

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Long-Term In-Service Monitoring and Performance Assessment of the Main Cables of Long-Span Suspension Bridges

Deng

Liu

Chen

2017

Sensors

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Despite the recent developments in structural health monitoring, there remain great challenges for accurately, conveniently, and economically assessing the in-service performance of the main cables for long-span suspension bridges. A long-term structural health monitoring technique is developed to measure the tension force with a conventional sensing technology and further provide the in-service performance assessment strategy of the main cable. The monitoring system adopts conventional vibrating strings transducers to monitor the tension forces of separate cable strands of the main cable in the anchor span. The performance evaluation of the main cable is conducted based on the collected health monitoring data: (1) the measured strand forces are used to derive the overall tension force of a main cable, which is further translated into load bearing capacity assessment using the concept of safety factor; and (2) the proposed technique can also evaluate the uniformity of tension forces from different cable strands. The assessment of uniformity of strand forces of a main cable offers critical information in terms of potential risks of partial damage and performance deterioration of the main cable. The results suggest the proposed low-cost monitoring system is an option to provide approximate estimation of tension forces of main cables for suspension bridges. With the long-term monitoring data, the proposed monitoring-based evaluation methods can further provide critical information to assess the safety and serviceability performance of main cables.

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Section: Introductionmentioning

confidence: 99%