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Wind-induced response and loads for the Confederation Bridge. Part Ⅰ: on-site monitoring data

机译：风引起的响应和联邦大桥的荷载。第一部分：现场监测数据

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摘要

This is the first of two companion papers that analyse ten years of on-site monitoring data for the Confederation Bridge to determine the validity of the original wind speeds and wind loads predicted in 1994 when the bridge was being designed. The check of the original design values is warranted because the design wind speed at the middle of Northumberland Strait was derived from data collected at shore-based weather stations, and the design wind loads were based on tests of section and full-aeroelastic models in the wind tunnel. This first paper uses wind, tilt, and acceleration monitoring data to determine the static and dynamic responses of the bridge, which are then used in the second paper to derive the static and dynamic wind loads. It is shown that the design ten-minute mean wind speed with a 100-year return period is 1.5％ less than the 1994 design value, and that the bridge has been subjected to this design event once on November 7, 2001. The dynamic characteristics of the instrumented spans of the bridge including frequencies, mode shapes and damping are in good agreement with published values reported by others. The on-site monitoring data show bridge response to be that of turbulent buffeting which is consistent with the response predicted at the design stage.
机译：这是分析联邦大桥十年现场监测数据的两篇论文中的第一篇，以确定1994年桥梁设计时预测的原始风速和风荷载的有效性。原始设计值的检查是必要的，因为诺森伯兰海峡中部的设计风速是从沿岸气象站收集的数据得出的，而设计风荷载是基于截面和全气动弹性模型在该地区的测试而得出的。风洞。第一篇论文使用风，倾斜和加速度监视数据来确定桥梁的静态和动态响应，然后在第二篇论文中使用这些数据来导出静态和动态风荷载。结果表明，设计的十分钟平均风速（具有100年的回收期）比1994年的设计值低1.5％，并且该桥于2001年11月7日经历了一次设计事件。动力特性桥梁的测量跨度（包括频率，振型和阻尼）中的跨度与他人报告的公布值非常一致。现场监测数据表明，桥梁的响应是湍流抖振响应，与设计阶段预测的响应一致。

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