Modeling and Mitigation of Stay Cable Vibration

斜拉桥在风、雨的共同作用下，经常表现出较大的主拉索振动。这些振动是令人担忧的，因为它们可能会导致缆索和缆索锚固的疲劳。过去对激励机制的研究一般是利用风洞进行的，并提出了几种不同的气动机制。虽然在理解和缓解这些振动方面已经取得了相当大的进展，但目前的技术水平仍然不能基于一组提供的参数来预测现场行为，也不存在针对该现象的可信的、可接受的模型。这项研究工作是建立在以前的发现和在过去的项目中收集的大量全面数据的基础上，以便在更基本的层面上对斜拉索振动的机理有所了解，并能够提出更有效和更经济的缓解策略。

Cable-Stayed bridges are commonly exhibiting large-amplitude vibrations of the main stays, frequently associated with the simultaneous occurrence of wind and rain. These vibrations are of concerns because they potentially induce fatigue in the cables and cable anchorages. Past research on excitation mechanisms has generally been conducted using wind tunnels, and several distinct aerodynamic mechanisms have been proposed. While considerable progress has been made in understanding and mitigating these vibrations, the state of the art has still not enabled the prediction of field behavior based on a set of supplied parameters, nor does a plausible, accepted model exist for the phenomenon. This research effort is building upon previous findings and the wealth of full-scale data collected in past projects in order to develop an understanding of the mechanics of stay-cable vibration at a more fundamental level and to enable the recommendation of more effective and economical mitigation strategies.