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首页> 外文期刊>Journal of Wind Engineering and Industrial Aerodynamics: The Journal of the International Association for Wind Engineering >Wind-induced vibration control of long span cable-stayed bridges using multiple pressurized tuned liquid column dampers
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Wind-induced vibration control of long span cable-stayed bridges using multiple pressurized tuned liquid column dampers

机译：大跨度斜拉桥风振控制的多重加压调谐液柱阻尼器

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This paper explores the possibility of using multiple pressurized tuned liquid column damper (MPTLCD) to reduce wind-induced vibration of long span cable-stayed bridges. By implementing a static pressure inside two sealed air chambers at two ends of a traditional tuned liquid column damper (TLCD), a pressurized tuned liquid column damper (PTLCD) is formed and its natural frequency can be adjusted by not only the length of its liquid column but also the pressure inside its two air chambers. This special feature of PTLCD in frequency tuning greatly facilitates its application to long span cable-stayed bridges for mitigating wind-induced multi-modes of vibration. To further enhance the robustness and effectiveness of PTLCD for vibration control, MPTLCDs are explored in this study. The finite element model of MPTLCD is developed and incorporated into the finite element model of a long span cable-stayed bridge for predicting the buffeting response of the coupled MPTLCD-bridge system in the time domain. The performance of MPTLCD for suppressing combined lateral and torsional vibration of a real long span cable stayed bridge is numerically assessed. The investigations show that the MPTLCD not only provides great flexibility for selecting liquid column length but also significantly reduces the lateral and torsional displacement responses of the long span bridge under wind excitation. (c) 2007 Published by Elsevier Ltd.
机译：本文探讨了使用多重加压调谐液柱阻尼器（MPTLCD）来减少大跨度斜拉桥风致振动的可能性。通过在传统的调谐液柱阻尼器（TLCD）两端的两个密封气室内部施加静压，可以形成加压的调谐液柱阻尼器（PTLCD），不仅可以通过其液体长度来调节其固有频率，色谱柱的压力，以及其两个气室内部的压力。 PTLCD在频率调谐方面的特殊功能极大地促进了其在大跨度斜拉桥上的应用，从而减轻了风引起的多种振动模式。为了进一步增强PTLCD振动控制的鲁棒性和有效性，本研究探索了MPTLCD。开发了MPTLCD的有限元模型，并将其合并到大跨度斜拉桥的有限元模型中，以预测时域中耦合的MPTLCD桥系统的抖振响应。通过数字评估了MPTLCD抑制实际大跨度斜拉桥的横向和扭转振动的性能。研究表明，MPTLCD不仅为选择液柱长度提供了很大的灵活性，而且显着降低了大跨度桥梁在风激励下的横向和扭转位移响应。 （c）2007年由Elsevier Ltd.发布。

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