重庆万豪国际会展大厦风效应试验研究

重庆万豪国际会展大厦是高度达303m的超高层钢结构，其基阶频率仅0．1234Hz，为了准确确定风荷载及其风致响应，对其进行了风致安全性及舒适性评估．采用风洞模型试验方法，对场地大气边界层进行了模拟；通过测压模型风洞试验测量风压系数的分布，并计算静风荷载；用气动弹性模型测量风致响应，包括大厦顶部的位移响应、加速度响应和角速度响应，并计算动风荷载．此外，还讨论了周边环境建筑对其风效应的影响．研究表明，周边建筑环境对大厦的静力和动力风荷载均有较大影响，在设计风速范围内不会产生驰振现象，其顶部加速度和角速度均小于限值，舒适性满足规范要求．

Experimental Research of Wind-Induced Responses of Chongqing Marriott International Conference Center Building

To obtain the wind load and wind-induced responses of the Chongqing Marriott International Conference Center Building, a tall steel structure building with a height of 303 m and the first frequency of 0. 123 4 Hz, to evaluate its living comfortableness and safety, a wind-tunnel model test was carried out to simulate natural wind in the turbulent boundary layer on the site of the building. The distribution of wind pressure on every surface of the building was measured by a static model, and the static wind load was calculated. The wind-induced responses, including displacement, acceleration and angular velocity responses, were measured by an aeroelastic model, and the dynamic wind load was gained. The effects of its surrounding buildings and structures were discussed. The result shows that the surrounding buildings have great effects on the wind load, no galloping will occur for the design velocity, the acceleration and angular velocity of the building top are smaller than their allowances and the living comfortability of the building meets the related national code.