结构振动对风特性测试结果的影响研究

发布时间：2019-01-24 09:09

【摘要】：现场实测是获得结构所在地风特性的主要途径,因而实测数据的准确性至关重要。为了开展风特性精细化研究,重点分析了结构振动对所测数据的影响。通过实验测出相同风场内考虑和不考虑风速仪基底振动的风特性时程数据,分析对比了不同工况下获得的平均风速、紊流强度、紊流积分尺度及功率谱密度,其中基底分别输入了"韦帕"台风作用下润扬大桥主梁跨中横向振动和白噪声。结果表明,在基底输入主梁振动信号时,基底振动对实测平均风速以及紊流特性的影响程度均很小,但会导致实测紊流强度和顺风向功率谱密度略高于真实值。结论可为结构风场测试及数据分析提供参考。
[Abstract]:The field measurement is the main way to obtain the wind characteristics of the structure location, so the accuracy of the measured data is very important. In order to study the wind characteristics finely, the influence of structural vibration on the measured data is analyzed. The time-history data of wind characteristics in the same wind field considering and without considering the base vibration of anemometer are measured, and the mean wind speed, turbulence intensity, turbulence integral scale and power spectral density obtained under different working conditions are analyzed and compared. The transverse vibration and white noise of the main girder of Runyang Bridge under the action of Typhoon Wepa are respectively input to the base. The results show that, when the vibration signal of the main beam is input from the substrate, the effect of the vibration on the measured mean wind speed and turbulence characteristics is very small, but the measured turbulence intensity and the downwind power spectral density are slightly higher than the real value. Conclusion it can provide reference for structural wind field test and data analysis.
【作者单位】：东南大学混凝土及预应力混凝土结构教育部重点实验室;
【基金】：国家自然科学基金项目(51378111) 霍英东青年教师基金应用研究项目(142007) 教育部新世纪优秀人才支持计划(NCET-13-0128) 亚热带建筑科学国家重点实验室开放基金重点项目(2014KA04) 中央高校基本科研业务费优秀青年教师项目(2242012R30002)
【分类号】：U441.2

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