不同台风下高层建筑气动阻尼比综合对比分析

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摘要基于浙江温州市区某方形高层建筑在不同台风下原型实测数据，应用单输入多输出的ERA-NExT理论方法，对影响气动阻尼比的诸多因素进行综合对比分析研究。结果表明：随着平均风速的增加，速度、加速度均方根也沿着幂函数增加；在小折减风速范围内（<1.0），气动阻尼比与折减风速、加速度（速度）均方根与幅值比值的关系也不是纯粹单调的，而是分区间增减变化，虽然四个台风的区间范围稍有不同，但变化规律却比较相似，而且其曲线数值大小的排列与风向角大小具相关性；X、Y向气动阻尼比与结构加速度功率谱幅值的关系具有相似规律。

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	张传雄1
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	李正农2
	史文海3
	潘月月2
	王澈泉2
	王艳茹1

关键词 ：高层建筑, 气动阻尼比, 原型实测, 模态参数, 折减风速

Abstract：Based on the actual measured data of a certain square high-rise building in Wenzhou, Zhejiang Province under different typhoons, multiple factors affecting the building’s aerodynamic damping ratio were comprehensively and contrastively analyzed using the SIMO ERA-NExT theoretical method.The results showed that with increase in the mean wind velocity, RMSs of the building’s vibration velocity and acceleration increase along a power function curve; within a small reduced wind speed range (<1.0), changes of the building’s aerodynamic damping ratio versus reduced wind velocity, and RMSs of structural vibration velocity and acceleration are not pure monotonous but piecewise; the change laws of the aerodynamic damping ratio under four typhoons are similar,the numerical value arrangement of their curves is related to the wind direction angle; the relation between the structural vibration acceleration power spectral amplitude and the aerodynamic damping ratio in X direction and that in Y direction have a similar law.

Key words： high-rise building aerodynamic damping ratio field measurements modal parameter reduced wind velocity

收稿日期: 2017-05-08 出版日期: 2018-10-28

引用本文:

张传雄1，2，李正农2，史文海3，潘月月2，王澈泉2，王艳茹1. 不同台风下高层建筑气动阻尼比综合对比分析[J]. 振动与冲击, 2018, 37(21): 100-107.
ZHANG Chuanxiong1，2，LI Zhengnong2，SHI Wenhai3，PAN Yueyue2，WANG Chequan2，WANG Yanru1. Comprehensive comparison analysis for aerodynamic damping ratio-of a tall building under different typhoons. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(21): 100-107.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2018/V37/I21/100

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