Journal ArticleDOI
Cause investigation of high-mode vortex-induced vibration in a long-span suspension bridge
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A significant vortex-induced vibration was observed in a suspension bridge under a wind velocity of approximately 6 and 7 m/s, and with a maximum amplitude that exceeded the serviceability of the bridge.Abstract:
A significant vortex-induced vibration (VIV) was observed in a suspension bridge under a wind velocity of approximately 6 and 7 m/s, and with a maximum amplitude that exceeded the serviceability li...read more
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Case study of vortex-induced vibration and mitigation mechanism for a long-span suspension bridge
Yaojun Ge,Lin Zhao,Jinxin Cao +2 more
TL;DR: In this article , the authors used field measurements, numerical simulations, and wind tunnel tests to systematically investigate triggering mechanism during the sudden first and secondary VIV phenomena of Humen Bridge, along with the structural mode and damping characteristics and VIV aerodynamic mitigation effects.
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Intelligent robotic systems for structural health monitoring: Applications and future trends
TL;DR: In this article , a comprehensive literature review is intended to provide guidelines for choosing the appropriate robotic platform for defect inspection or vibration measurement of bridges and other types of civil infrastructure and also can give some insights into the development of versatile robots for structural health monitoring (SHM) applications.
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A fast on-site measure-analyze-suppress response to control vortex-induced-vibration of a long-span bridge
TL;DR: In this paper, a spoiler was proposed to be installed on the handrail to mitigate vortex and suppress VIV on Humen Bridge, where wind speeds, structural motion, and airflow at the wake of the bridge section can also be recorded separately.
Journal ArticleDOI
Vortex-induced vibration measurement of a long-span suspension bridge through noncontact sensing strategies
Journal ArticleDOI
A fast on-site measure-analyze-suppress response to control vortex-induced-vibration of a long-span bridge
TL;DR: In this article , a spoiler was proposed to be installed on the handrail to mitigate vortex and suppress VIV on Humen Bridge, where wind speeds, structural motion, and airflow at the wake of the bridge section can also be recorded separately.
References
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Journal ArticleDOI
Modal identification of output-only systems using frequency domain decomposition
TL;DR: By introducing a decomposition of the spectral density function matrix, the response spectra can be separated into a set of single degree of freedom systems, each corresponding to an individual mode, and close modes can be identified with high accuracy even in the case of strong noise contamination of the signals.
Modal Identification of Output-Only Systems using Frequency Domain Decomposition
TL;DR: In this paper, a decomposition of the spectral density function matrix is introduced for the modal identification of output-only systems, i.e. in the case where the modality parameters must be estimated without knowing the input of the system.
The Natural Excitation Technique (NExT) for modal parameter extraction from operating wind turbines
TL;DR: The Natural Excitation Technique (NExT) is a method of modal testing that allows structures to be tested in their ambient environments as mentioned in this paper, and has been used extensively in the literature.
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Damping Estimation Using Free Decays and Ambient Vibration Tests
TL;DR: In this article, the quality of modal damping ratios estimates based on ambient and free vibration tests using both numerical simulations and data collected on large Civil Engineering structures where both tests were performed.
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Storebælt suspension bridge – vortex shedding excitation and mitigation by guide vanes
TL;DR: In this article, the results of on-site monitoring of the oscillations and wind speed measurements at the nearby island of Sprogo correlated well with wind-tunnel test results obtained during design, indicating that the observed oscillations were due to periodic von Karman type vortex shedding in the wake of the girder.