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以深圳石岩大树林公园开敞式体育场为例,进行开敞式屋盖结构风荷载特性、结构自振特性、风振响应特性、风振系数研究。首先,通过风洞试验,给出了24个不同方向角结构表面的风荷载分布,挑选较为不利的风向角。其次,进行了结构自振特性研究,分析了结构的刚度薄弱处和振动特点。然后,在对结构表面风荷载分析的基础上,选择6个典型的风向角进行结构的风致动力响应分析。最后,对动力分析结果进行统计分析,提出了可供设计参考的风振系数建议值,为今后工程人员设计开敞式屋盖结构提供参考。
Taking Shenzhen Shiyan Da Shulin Park open stadium as an example, the wind load characteristics, natural vibration characteristics, wind vibration response characteristics and wind vibration coefficient of open roof structure are studied. Firstly, the wind load distribution of 24 different direction angle structures is obtained through wind tunnel test, and the more unfavorable wind direction angle is selected. Secondly, the natural vibration characteristics of the structure are studied, the weakness of the structure and the vibration characteristics are analyzed. Then, based on the wind load analysis of the structure surface, six typical wind direction angles are selected to analyze the wind-induced dynamic response of the structure. Finally, the statistical analysis of the dynamic analysis results and the proposed value of the wind-induced vibration coefficient for design reference are provided for the future engineering personnel to provide reference for the design of open roof structure.