结合CFD数值方法和风洞试验分析了高层建筑顶部横梁的气动力和风荷载特性。CFD数值结果显示建筑顶部绕流会显著增大横梁处的气流风攻角；横梁气动力的数值计算结果和风洞试验结果均证实横梁为驰振稳定截面；风振分析显示横梁的峰值升力大于峰值阻力，通过进一步分析广义力功率谱密度函数和频率比对峰值升力的影响，证实横梁在50年重现期强风作用下处于涡激共振状态。
Abstract
The characteristics of aerodynamic force and wind load of horizontal beam located tall building top are discussed by numerical simulation and wind tunnel experiments. The results of numerical simulation show that wind attack angle of horizontal beam increase significantly due to the effect of flow around the building top. The horizontal beam is confirmed as galloping stability with the aerodynamic force of beam obtained from numerical simulation and wind tunnel tests. The wind-induced response analysis for beam reveals that its peak lift is greater than the peak drag. The analysis of power spectral density function of general force and the influence of frequency ratio on peak lift are further conducted, which implies that the horizontal beam is prone to vortex-induced resonance under the wind of 50 year return period.
关键词
高层建筑 /
横梁 /
风洞试验 /
数值模拟 /
气动力 /
涡激共振
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Key words
high-rise buildings /
horizontal beam /
wind tunnel test /
numerical simulation /
aerodynamic force /
vortex-induced resonance
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参考文献
[1] 李寿英，陈政清. 超高层建筑风致响应及等效静力风荷载研究[J]. 建筑结构学报, 2010, 31(13): 32-37.
Li Shouying, Chen Zhengqing. Experimental and theoretical study on wind induced responses and effective static wind load on super-high-rise buildings [J]. Journal of Building Structures, 2010, 31(13): 32-37.
[2] 谢壮宁, 李佳. 强风作用下楔形外形超高层建筑横风效应试验研究[J]. 建筑结构学报, 2011, 32(12): 118-126.
Xie Zhuangning, Li Jia. Experimental research on cross wind effect on tapered super-tall buildings under action of strong wind [J]. Journal of Building Structures, 2011, 32(12): 118-126.
[3] Cermak J E. Wind tunnel development and trends in applications to civil engineering [J]. Journal of Wind Engineering and Industrial Aerodynamics, 2003, 91(3): 355-370.
[4] 周云, 刘纯, 汪大洋. 高层建筑楼顶钢塔风振效应的参数研究[J]. 振动与冲击, 2011, 30(2): 48-54.
Zhou Yun, Liu Chun, Wang Dayang. Parameter influences on wind-induced vibration of a high-rise building with steel tower protrusion [J]. JOURNAL OF VIBRATION AND SHOCK, 2011, 30(2): 48-54.
[5] 李祚华, 藤军, 容柏生, 等. 高层结构屋顶构架风振控制设计与研究[J]. 西安建筑科技大学学报(自然科学版),2006, 38(4): 504-508.
Li Zuohua, Teng Jun, Rong Bosheng, et al. Design and analysis for wind-induced vibration control of roof truss of high-rise structure [J]. J. Xi’an Univ. of Arch. & Tech. ( Natural Science Edition), 2006, 38(4): 504-508.
[6] Yi Yang, Ming Gu, Suqin Chen, et al. New inflow boundary conditions for modeling the neutral equilibrium atmospheric boundary layers in Computational Wind Engineering [J]. Journal of Wind Engineering and Industrial Aerodynamics, 2009, 97 (2): 88-95.
[7] JTG/T D60-01—2004, 公路桥梁抗风设计规范 [S]. 北京: 人民交通出版社, 2004.
JTG/TD60-01-2004, Wind-resistent Design Specification for Highway Bridges [S]. Beijing: China Communications Press, 2004.
[8] 谢壮宁, 方小丹, 倪振华. 超高层建筑的等效静风荷载—扩展荷载响应相关方法[J]. 振动工程学报, 2008, 21(4): 398-403.
Xie Zhuangning, Fang Xiaodan, Ni Zhenhua. Equivalent static wind loads on tall building—the extended load-response-correlation (ELRC) approach [J]. Journal of Vibration Engineering, 2008, 21(4): 398-403.
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