Wind Force Coefficients for Designing Porous Canopy Roofs

作     者：Yasushi Uematsu Hiromichi Sakurai Yukari Miyamoto Eri Gavansky 

作者机构：Department of Architecture and Building Science Graduate School of Engineering Tohoku University Sendai 980-8579 Japan Tohoku Electric Power Co. Inc. Sendai 980-8550 Japan Kume Sekkei Co. Ltd. Tokyo 135-8567 Japan 

出 版 物：《Journal of Civil Engineering and Architecture》 (土木工程与建筑（英文版）)

年 卷 期：2013年第7卷第9期

页      码：1047-1055页

摘      要：Wind force coefficients for designing porous canopy roofs have been investigated based on a series of wind tunnel experiments. Gable, troughed and mono-sloped roofs were tested. The roof models were made of 0.5 mm thick perforated duralumin plates, the porosity of which was changed from 0 to about 0.4. Overall aerodynamic forces and moments acting on the roof model were measured in a turbulent boundary layer with a six-component force balance for various wind directions. The results indicate that the wind loads on canopy roofs generally decrease with an increase in porosity of the roof. Assuming that the roof is rigid and supported by the four corner columns with no walls, the axial forces induced in the columns are regarded as the most important load effect for discussing the design wind loads. Two loading patterns causing the maximum tension and compression in the columns are considered. Based on a combination of the lift and moment coefficients, the design wind force coefficients on the windward and leeward halves of the roof are presented for the two loading patterns as a function of the roof pitch and porosity. The effect of porosity is taken into account as a reduction factor of the wind loads.

主 题 词：Canopy roof porosity wind force coefficient wind tunnel experiment codification. 

学科分类：081302[081302] 08[工学] 0813[工学-化工与制药类] 0822[工学-核工程类] 

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