کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
292786 511068 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Design wind loads for tubular-angle steel cross-arms of transmission towers under skewed wind loading
ترجمه فارسی عنوان
طراحی باد بار برای زاویه مقیاس فولاد زاویه ای از برج های انتقال تحت بارگذاری باد بارگذاری شده است
کلمات کلیدی
برج انتقال فولاد زاویه دار فولادی، آزمون تونل باد، اثرات شماره رینولدز، باد سپر بار باد
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی

Wind tunnel tests on two cross-arm models of a 500 kV tubular-angle steel transmission tower at three mean wind speeds were carried out. The drag coefficients in wind directional axis for 19 incidence angles were obtained. The skewed wind load factors, the wind load distribution factors in transversal and longitudinal direction were calculated. Two fitting functions for the skewed wind load factors of tubular-angle steel cross-arms were determined by nonlinear fitting analysis. The wind incidence angle corresponding to the maximum skewed wind load is near 80° or 85°. With the assumption that the drag coefficients are valued based on the experimental results, the effective projected areas (EPA) of the cross-arms were calculated. The parameters for calculating the skewed wind loads developed from the wind tunnel tests were compared to the regulations in some applicable standards. Suggestions on the drag coefficients, the skewed wind load factors and the wind load distribution factors were proposed. Especially for Chinese standard, the drag coefficient of single member should be substituted by that of the single frame in calculating the global drag coefficients of cross-arms. The transversal wind load for 0° wind incidence angle and the longitudinal wind load for 30° wind incidence angle are conservative.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Wind Engineering and Industrial Aerodynamics - Volume 140, May 2015, Pages 10–18
نویسندگان
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