Buffeting response of a suspension bridge in complex terrain

被引：106

作者：

Cheynet, Etienne ^{[1
]}

Jakobsen, Jasna Bogunovic ^{[1
]}

Snaebjornsson, Jonas ^{[1
,2
]}

机构：

[1] Univ Stavanger, Dept Mech & Struct Engn & Mat Sci, N-4036 Stavanger, Norway

[2] Reykjavik Univ, Sch Sci & Engn, Menntavegur 1, IS-101 Reykjavik, Iceland

来源：

ENGINEERING STRUCTURES | 2016年 / 128卷

关键词：

Full-scale measurement; Long-span bridge; Complex topography; Turbulence; Wind excitation; Buffeting response; Frequency domain; FULL-SCALE MEASUREMENT; CABLE-STAYED BRIDGE; LONG-SPAN BRIDGES; OPERATIONAL MODAL-ANALYSIS; FAST FOURIER-TRANSFORM; FIELD-MEASUREMENTS; AEROELASTIC MODEL; TURBULENT WIND; HUMBER BRIDGE; NATURAL WIND;

D O I：

10.1016/j.engstruct.2016.09.060

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The buffeting response of a suspension bridge in complex terrain is studied based on full-scale data from sonic anemometers and accelerometers installed on the Lysefjord Bridge in Norway. The influence of the topography on the wind field and the associated effects on the displacement response are investigated. The two main wind conditions observed display different characteristics, which requires a case by case approach, and a refined description of the wind co-coherence. The identification of the mode shapes and modal damping ratios is carried out using ambient vibration data as a verification procedure. The buffeting response of the bridge is computed in the frequency domain, and compared to the recorded response in terms of standard deviation and power spectral density of the displacement response. The overall comparison is found satisfactory, although some discrepancies are observed. These are attributed to large yaw angles and non-stationary wind fluctuations caused by the influence of a complex topography on the flow properties. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：474 / 487

页数：14

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