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武汉国际证券大厦为典型钢结构超高层建筑,对风荷载十分敏感。基于刚性模型表面测压风洞试验,得到了武汉国际证券大厦的表面风压时程,在此基础上,通过数据处理建立了三维频域风荷载模型,进而采用随机振动理论,计算得到该大厦两个水平主轴向和扭转向的最大位移和加速度响应,并进一步分析了大厦加速度和位移响应的变化规律。最后,系统分析了在不同重现期风速作用下,武汉国际证券大厦的抗风设计指标,为结构工程师进行结构抗风设计提供必要的参考。
Wuhan International Securities Building is a typical steel structure of super high-rise buildings, the wind load is very sensitive. Based on the wind tunnel test of rigid model surface pressure measurement, the surface wind pressure history of Wuhan International Securities Building was obtained. Based on this, the 3D frequency-domain wind load model was established by data processing, and then the random vibration theory was used to calculate the wind pressure. The maximum horizontal displacement and acceleration responses of the two horizontal and vertical main axes are also analyzed. The variation of acceleration and displacement response of buildings are further analyzed. Finally, the wind-resistance design indexes of Wuhan International Securities Building under the effect of wind speed in different recurring periods are systematically analyzed, which provides the necessary references for the structural engineers to design wind-resistant structures.