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首页> 外文学位 >Impact of Cable-deck Interaction on the Efficiency of External Damper in Controlling Stay Cable Vibration on Cable-Stayed Bridges.
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Impact of Cable-deck Interaction on the Efficiency of External Damper in Controlling Stay Cable Vibration on Cable-Stayed Bridges.

机译：缆索桥面相互作用对控制斜拉桥斜拉索振动的外部阻尼器效率的影响。

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摘要

External dampers are widely used to control vibrations of stay cables on cable-stayed bridges. In general, the estimation of the damping of a stay cable in a cable-damper system is done based on the assumption that the bridge stay cable has fixed supports at both ends and the damper has a fixed support on the deck. But long-span bridges experience frequent bridge-girder vibrations under dynamic loadings due to long span length, light weight and flexible nature. Therefore, the assumptions of fixed support for the cable and damper is no longer valid in the case of long-span bridges.;An analytical model has been proposed in the current study to determine the damping property of a bridge stay cable when attached with a damper, by considering the effect of bridge-deck vibration on the cable and the damper. The static and the dynamic behaviour of the cable-damper-deck system have been simulated in the model. The validity of the model was verified by assuming a very rigid equivalent beam and was compared with the results obtained from a cable fixed end case. A Matlab program was developed to perform matrix calculations and iterations associated with the model. Associated dynamic analysis was carried out using the finite element model in ABAQUS 6.9.;Case studies were conducted to investigate the effect of cable-deck interaction on the damper efficiency for cable-stayed bridges with different span lengths. The range of main span length that requires the consideration of bridge-deck vibration for the estimation of damper efficiency was proposed.
机译：外部阻尼器广泛用于控制斜拉桥上斜拉索的振动。通常，电缆减震器系统中的斜拉索的阻尼估计是基于以下假设：桥斜拉索的两端均具有固定支撑，而阻尼器在甲板上具有固定支撑。但是，大跨度的桥梁由于其跨度长，重量轻和易弯曲的特性，在动态荷载作用下经常遭受桥梁的振动。因此，在大跨度桥梁的情况下，对缆索和阻尼器的固定支撑的假设不再成立。；目前的研究中提出了一种解析模型，用于确定桥式缆索与阻尼器连接时的阻尼特性。通过考虑桥面振动对电缆和阻尼器的影响。在模型中模拟了电缆-阻尼器-甲板系统的静态和动态行为。通过假设一个非常刚性的等效梁来验证模型的有效性，并将其与从电缆固定端盒获得的结果进行比较。开发了Matlab程序来执行矩阵计算和与模型相关的迭代。使用ABAQUS 6.9中的有限元模型进行了动态分析；进行了案例研究，研究了索桥相互作用对不同跨度斜拉桥的阻尼器效率的影响。提出了在考虑阻尼效率时需要考虑桥面振动的主跨长度范围。

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  • 作者

    Koralalage, Krishanth.;

  • 作者单位

    University of Windsor (Canada).;

  • 授予单位 University of Windsor (Canada).;
  • 学科 Engineering Civil.
  • 学位 M.A.Sc.
  • 年度 2011
  • 页码 124 p.
  • 总页数 124
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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