Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Stagnation point-induced vibration on ultra-long stay cables and the vibration control by using a novel stockbridge damper
https://orcid.org/0000-0002-9206-0742
https://orcid.org/0000-0002-0900-6420
Abstract A peculiar wind-induced vibration with large acceleration amplitude, super-high and narrow frequency bands was observed on ultra-long stay cables after one-year-more field monitoring on the Sutong Bridge. The vibration was found extremely detrimental and cannot be suppressed by a single damper system. Based on this, it is first demonstrated that the vibration is a unique vortex-induced vibration resulting from the damper installation position, and which is named stagnation point-induced vibration (SPIV). Subsequently, a Stockbridge damper (SBD) scheme, usually used on transmission lines, is introduced to suppress the SPIV: the dynamic model of the stay cable-SBD system is established; the additional damping ratios are calculated based on the proposed model and the equations; moreover, parameter optimisation analyses of the SBD are conducted. Then, a real SBD is designed, produced, and finally installed on an actual stay cable with a length of 551 m based on the optimum parameters. Finally, with six months of field vibration monitoring data, the proposed dynamic model and the SBD damping scheme are demonstrated effective to the suppression of the detected SPIV. The study is expected to give a practical vibration control reference for ultra-long stay cables that are more than 500 m.
Highlights A peculiar wind-induced high-mode vibration on stay cables were observed through long-term field monitoring. The vibration is proved being related to the installation position of the existing dampers. A novel Stockbridge damper scheme was introduced to suppress the vibration. A practical Stockbridge damper is fabricated and installed on an actual stay cable with a length of 551 m. The practical vibration suppression effects of the proposed damper system were proved through long-term field monitoring.
Stagnation point-induced vibration on ultra-long stay cables and the vibration control by using a novel stockbridge damper
https://orcid.org/0000-0002-9206-0742
https://orcid.org/0000-0002-0900-6420
Abstract A peculiar wind-induced vibration with large acceleration amplitude, super-high and narrow frequency bands was observed on ultra-long stay cables after one-year-more field monitoring on the Sutong Bridge. The vibration was found extremely detrimental and cannot be suppressed by a single damper system. Based on this, it is first demonstrated that the vibration is a unique vortex-induced vibration resulting from the damper installation position, and which is named stagnation point-induced vibration (SPIV). Subsequently, a Stockbridge damper (SBD) scheme, usually used on transmission lines, is introduced to suppress the SPIV: the dynamic model of the stay cable-SBD system is established; the additional damping ratios are calculated based on the proposed model and the equations; moreover, parameter optimisation analyses of the SBD are conducted. Then, a real SBD is designed, produced, and finally installed on an actual stay cable with a length of 551 m based on the optimum parameters. Finally, with six months of field vibration monitoring data, the proposed dynamic model and the SBD damping scheme are demonstrated effective to the suppression of the detected SPIV. The study is expected to give a practical vibration control reference for ultra-long stay cables that are more than 500 m.
Highlights A peculiar wind-induced high-mode vibration on stay cables were observed through long-term field monitoring. The vibration is proved being related to the installation position of the existing dampers. A novel Stockbridge damper scheme was introduced to suppress the vibration. A practical Stockbridge damper is fabricated and installed on an actual stay cable with a length of 551 m. The practical vibration suppression effects of the proposed damper system were proved through long-term field monitoring.
Stagnation point-induced vibration on ultra-long stay cables and the vibration control by using a novel stockbridge damper
https://orcid.org/0000-0002-9206-0742
https://orcid.org/0000-0002-0900-6420
Abstract A peculiar wind-induced vibration with large acceleration amplitude, super-high and narrow frequency bands was observed on ultra-long stay cables after one-year-more field monitoring on the Sutong Bridge. The vibration was found extremely detrimental and cannot be suppressed by a single damper system. Based on this, it is first demonstrated that the vibration is a unique vortex-induced vibration resulting from the damper installation position, and which is named stagnation point-induced vibration (SPIV). Subsequently, a Stockbridge damper (SBD) scheme, usually used on transmission lines, is introduced to suppress the SPIV: the dynamic model of the stay cable-SBD system is established; the additional damping ratios are calculated based on the proposed model and the equations; moreover, parameter optimisation analyses of the SBD are conducted. Then, a real SBD is designed, produced, and finally installed on an actual stay cable with a length of 551 m based on the optimum parameters. Finally, with six months of field vibration monitoring data, the proposed dynamic model and the SBD damping scheme are demonstrated effective to the suppression of the detected SPIV. The study is expected to give a practical vibration control reference for ultra-long stay cables that are more than 500 m.
Highlights A peculiar wind-induced high-mode vibration on stay cables were observed through long-term field monitoring. The vibration is proved being related to the installation position of the existing dampers. A novel Stockbridge damper scheme was introduced to suppress the vibration. A practical Stockbridge damper is fabricated and installed on an actual stay cable with a length of 551 m. The practical vibration suppression effects of the proposed damper system were proved through long-term field monitoring.
Stagnation point-induced vibration on ultra-long stay cables and the vibration control by using a novel stockbridge damper
Wang, Yafei (Autor:in) / Liu, Zhiwen (Autor:in) / Yang, Chao (Autor:in) / Brownjohn, James (Autor:in) / Hua, Xugang (Autor:in) / He, Jia (Autor:in) / Chen, Zhengqing (Autor:in)
07.08.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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