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Calculation of wind-induced responses and equivalent static wind loads
of high-rise buildings based on wind tunnel tests |
| SHEN Guo-hui1, WANG Ning-bo2, SUN Bing-nan1, LOU Wen-juan1 |
1. Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China;
2. China Northwest Building Design Research Institute, Xi’an 710003, China |
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Abstract A new methodology based on the results of wind tunnel tests was proposed in order to obtain the wind-induced responses and equivalent static wind loads (ESWLs) of a highrise building which has complicated shape and is under the aerodynamic interference of other buildings. The resultant forces on layers of the high-rise building were calculated based on the wind pressures measured simultaneously from wind tunnel tests. Based on the simplified layer model, a methodology to obtain the wind-induced responses and ESWLs accounting for different responses was developed in the frequency domain. Then the developed methodology was applied to a high-rise building to show how it works. Results show that the displacements of the building are contributed mainly by the first vibrating mode, whereas the accelerations are contributed by first several vibrating modes. The displacements and accelerations calculated in the frequency domain match well with those calculated in the time domain. Three ESWLs accounting for the displacement on the top of the building, the base shear and the base moment are almost the same for this building. The accumulated value of ESWLs can be used to determine the most unfavorable wind direction．
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Published: 01 March 2012
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基于风洞试验的高层建筑风致响应和
等效风荷载计算
针对复杂体型和有气动干扰情况下高层建筑的风致响应和设计风荷载问题,提出一种基于风洞试验的计算方法,利用同步测压的风洞试验数据获得高层建筑的风压测层合力,基于简化层模型,在频域内给出该高层建筑风致响应和对应于各种响应等效风荷载的计算方法,并将该方法应用于某高层实例.分析表明：位移响应以第1阶模态贡献为主,加速度响应的前几阶模态均有贡献；采用频域和时域方法获得的位移和加速度响应吻合较好；本实例中基于顶部位移、底部剪力和底部弯矩的等效风荷载结果非常接近；等效风荷载的累加值可用来判断最不利风向角.
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| ［1］ 中华人民共和国建设部. GB500092001建筑结构荷载规范［M］. 北京：中国建筑工业出版社,2002．
［2］ DAVENPORT A G. Gust loading factors［J］. Journal of Structural Division, 1967, 93(ST3):11-34．
［3］ ZHOU Y, GU M, XIANG HF. Alongwind static equivalent wind loads and responses of tall building: partⅠ: unfavorable distributions of static equivalent wind loads［J］. Journal of Wind Engineering and Industrial Aerodynamics, 1999, 79 (1/2):135-150．
［4］ ZHOU Y, KAREEM A, GU M. Equivalent static buffeting wind loads on structures［J］. Journal of Structural Engineering, ASCE, 2000, 126(8):989-992．
［5］ 顾明,叶丰. 高层建筑风致响应和等效风荷载的特征［J］.工程力学, 2006,23(7): 93-98．
GU Ming, YE Feng. Characteristics of wind induced responses and equivalent static wind loads of tall building［J］. Engineering Mechanics, 2006,23(7): 93-98．
［6］ 全涌,顾明. 高层建筑横风向风致响应及等效静力风荷载的分析方法［J］. 工程力学, 2006,23(9): 84-88．
QUAN Yong, GU Ming. Analytical method of acrosswind response and equivalent static wind loads of highrise buildings［J］.Engineering Mechanics, 2006,23(9): 84-88．
［7］ 张建国,顾明. 高层建筑背景静力等效风荷载分布［J］. 同济大学学报,2008,36(3): 285-290．
ZHANG Jianguo, GU Ming. Distribution of background equivalent static wind load on highrising buildings［J］. Journal of Tongji University：Natural Science,2008,36(3): 285-290．
［8］ 沈国辉, 孙炳楠, 楼文娟. 对称双塔楼建筑的风荷载分布特征［J］. 建筑结构学报, 2004, 24(1):64-68．
SHEN Guohui, SUN Bingnan, LOU Wenjuan. Distribution of wind load on symmetrical double tower tall building［J］. Journal of Building Structures, 2004, 24(1):64-68．
［9］ 徐培福. 复杂高层建筑结构设计［M］.北京: 中国建筑工业出版社, 2005:99-105．
［10］ 方德平,王全凤. Wilson_法两种积分格式的稳定性探讨［J］. 计算力学学报, 2008, 25(4):539-541.
FANG Deping, WANG Quanfeng. Stability discussion of two integration formats for Wilsonθ Method ［J］.Journal of Computational Mechanics, 2008, 25(4):539-541.
［11］ 谢壮宁,方小丹,倪振华. 超高层建筑的等效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 buildingthe extended loadresponsecorrelation(ELRC) approach［J］. Journal of Vibration Engineering, 2008, 21(4): 398-403. |
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