| 大型三面广告牌结构风荷载特性的风洞试验 |
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| 引用本文： | 汪大海,向越,罗烈,李志豪,彭勇波,申 琪.大型三面广告牌结构风荷载特性的风洞试验[J].同济大学学报(自然科学版),2020,48(1):16-23. |
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| 作者姓名： | 汪大海 向越 罗烈 李志豪 彭勇波 申 琪 |
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| 作者单位： | 武汉理工大学 土木工程与建筑学院，湖北 武汉 430070,武汉理工大学 土木工程与建筑学院，湖北 武汉 430070,同济大学 土木工程学院 上海 200092,武汉理工大学 土木工程与建筑学院，湖北 武汉 430070,同济大学 土木工程学院 上海 200092,武汉理工大学 土木工程与建筑学院，湖北 武汉 430070 |
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| 基金项目： | 国家自然科学基金资助(51878527,51578434) |
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| 摘 要： | 针对三面广告牌这类特殊开敞的板式高耸结构,通过刚性模型的多点同步测压试验,考察了各风向作用下面板表面净风压分布的统计特征和正负风压极值的包络分布;针对面板支撑结构的抗风设计,给出了典型不利风向角下各面板的体形系数及其简化取值;并给出了面板结构的整体风力系数随风向角的变化规律。研究从面板连接、面板支撑体系、支撑立柱这三个层面,为三面广告牌风荷载取值提供了可靠的试验数据和计算依据。
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| 关 键 词： | 三面广告牌 风洞试验 风压系数 体型系数 风力系数 |
| 收稿时间： | 2019/3/26 0:00:00 |
| 修稿时间： | 2019/10/24 0:00:00 |
Investigation of Wind Load Characte- ristics of Three-Plate Billboard Using Wind Tunnel Testing |
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| Institution: | School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China,School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China,State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China,School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China,State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China and School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China |
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| Abstract: | With the rapid development of large outdoor billboards in recent years, their destruction resulted from the strong wind happen occasionally.A billboard is a typical wind- vulnerable high-rise structure with special open plates. The synchronous multi-pressure scanning measurement was conducted to the rigid model of a typical three-plate billboard. The statistical characteristics of net pressure distribution on the plates in different wind directions were comprehensively analyzed. Moreover,the envelop of the maximum positive and negative value of wind pressure in all wind directions are supplied and simplified. Furthermore, the shape factors of wind load distribution on the three plates and their simplified diagrams in most unfavorable wind directions were discussed and given. The change of wind force coefficients of overall three plates in different wind directions was analyzed as well. This paper provides basic data and wind load parameters for the wind resistant design of the plates and the supporting column of three-plate billboards. |
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