Abstract

A custom-made monitoring system for long-term measurements of the wind field, surface pressures and structural response has been installed on the Gjemnessund Bridge in Norway. The monitoring system has been operating from 2018 to 2021. The scope was to investigate several topics within bridge aerodynamics in a full-scale environment, e.g. vortex shedding, gust response and span-wise correlations. Six cross-sectional strips with pressure taps were installed on the bridge. The pressure strips covered a span-wise distance equal to approximately six times the deck width. The upstream and the wake flow properties were measured in five locations along the same span. A case study showed that the ten-second gust correlations were stronger than the ten-minute correlations, both span-wise and section-wise. The gust impact on the bridge caused peak-to-peak mid-span amplitudes of 1 m vertically and 2 m laterally.

摘要

在挪威的 Gjemnessund 大桥上安装了一个定制的监测系统，用于长期测量风场、地表压力和结构响应。监测系统从 2018 年到 2021 年一直在运行。其范围是在全尺度环境中研究桥梁空气动力学中的几个主题，例如涡流脱落、阵风响应和跨度相关性。桥上安装了六个带测压口的横截面条。压力带覆盖的跨距距离约为甲板宽度的六倍。在同一跨度的五个位置测量上游和尾流特性。一个案例研究表明，10 秒阵风的相关性强于 10 分钟的相关性，无论是跨度还是截面。