（浙江大学建筑工程学院， 杭州 310058）

［摘要］为探讨高层钢结构风振计算模型的合理性和风振响应特性，对某钢结构高层住宅进行了风洞试验，得到了建筑表面的风荷载时程；建立面向风振分析的弹性楼板精细模型、刚性楼板精细模型和简化层刚片模型，将测得的风荷载时程分别施加于三种模型，按随机振动理论计算得到了各模型在不同风向角下的顺风向、横风向和扭转向风振响应统计值，并与相关规范方法结果进行比较。结果显示：结构的峰值位移响应虽由顺风向控制，但加速度响应由横风向控制，扭转向加速度接近于顺风向；基于刚性楼板假定的风振分析所带来的偏差并不大，但采用简化层刚片模型及规范方法求得的扭转向位移可能偏不安全。

［关键词］钢结构; 高层住宅; 风振响应; 时域分析; 精细有限元

中图分类号：TU311.3      文献标识码：A      文章编号：1002-848X(2014)19-0021-05

Study on wind vibration models and wind vibration characteristics of high-rise steel residential buildings

Cheng Rui, Chen Shuifu

 (College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China)

Abstract: In order to investigate the reasonability of wind vibration analytical models and wind vibration characteristics of high-rise steel structures, wind tunnel model test was conducted on a residential high-rise steel building for measuring the wind-load time-history curve of the building surface. Three computational structural models were established to analyze the wind dynamic responses, including the refined finite element model with elastic floors, refined finite element model with rigid floors and the simplified rigid floor piece model. The measured wind-load time-history curve was thereafter imposed on the three models, and the statistical values of along-wind, across-wind and torsional wind vibration responses for different wind angle cases were determined employing the stochastic vibration theory. The obtained results were also compared with those calculated using the load code approach. The results indicate that although the peak displacement responses of the structure are dominated by the along-wind direction, the acceleration responses are dominated by the across-wind direction and the magnitudes of torsional accelerations are close to those of along-wind direction. The deviations induced just by the rigid floor assumption are quite small, but the employment of the simplified rigid floor piece model and the load code approach may probably lead the torsional displacements to an unsafe condition.

Keywords: steel structure; high-rise residential building; wind vibration response; time domain analysis; refined finite element

*国家自然科学基金资助项目(50978230)。

通讯作者：陈水福，博士，教授，Email: csf@zju.edu.cn。

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