کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4924890 | 1431102 | 2017 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Investigation on characteristics and span-wise correlation of vortex-induced forces on a twin-box deck using newly-developed wind-tunnel test technique
ترجمه فارسی عنوان
بررسی ویژگی ها و همبستگی پیچیده نیروهای ناشی از گرداب بر روی یک جعبه دوقلوی با استفاده از تست تونل بادی جدید
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی
Vortex-induced vibration (VIV) is a typical type of wind-induced vibration of long-span bridges, which has the potential to cause large-amplitude oscillation at low wind speeds. The span-wise correlation of vortex-induced forces (VIFs) should be considered in the prediction of vortex-induced responses. At present, forced-motion tests with pressure measurements are often used to investigate the span-wise correlation of VIFs, but these tests may not be able to truly represent the nonlinear wind-structure interaction in VIV. This paper uses a newly-developed wind tunnel test technique to measure vortex-induced responses and forces at different span-wise locations. This study investigates the frequency-domain characteristics and the span-wise correlation of the VIFs on a twin-box deck under both smooth and turbulent flow fields. The results show that the fundamental- and triple-frequency components of the VIFs play major roles in the VIV. The fundamental-frequency component of the VIFs can be seen as perfectly correlated within the lock-in range under smooth wind flow, even when the structural damping ratio increases from 0.35% to 0.8%. Under turbulent flow field, the correlation decays mildly with the increase of turbulence intensity, but within the lock-in range, the VIF is still well correlated even with a turbulence intensity of 8%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Wind Engineering and Industrial Aerodynamics - Volume 164, May 2017, Pages 69-81
Journal: Journal of Wind Engineering and Industrial Aerodynamics - Volume 164, May 2017, Pages 69-81
نویسندگان
Q. Zhu, B.Y. Chen, L.D. Zhu, Y.L. Xu,