高层建筑围护结构风压系数的概率特征及其极值POT估计

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Abstract As determining the design wind loads of facades of high-rise buildings, the probability characteristics of pressure coefficients should be taken account into the estimation of extreme pressure coefficients. For overcome the deficiency of hardness for determining the threshold in the POT (Peak over threshold) method for extreme estimation, the wind tunnel tests of CAARC building were conducted in wind tunnel. Firstly, the probability characteristics of pressure coefficients are specially studied, and it is shown that Gaussian distribution is good for the pressure coefficient in the upwind region, as well as the Gamma distribution is good for the pressure coefficient in the leeward region, the GEV (Generalized Extreme Value) distribution is good for the minimum pressure coefficient in the upwind region. Secondly, a modified POT method is proposed to estimate the extreme of pressure coefficients, it is indicated that the modified POT method is more accurate and more stable than the other extreme method. The bias between modified POT method and standard extreme is lower than 5% with 5 time-history samples. At last, the distributions of extreme pressure coefficients are given out for designing.

Received: 15 September 2021 Published: 15 January 2023

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	Articles by authors
	LI Shouke1
	MAO Dan1
	LIU Min1
	GUO Fan1
	SUN Hongxin1
	CHEN Yuankun2
	DENG Shengxiang3

Cite this article:

LI Shouke1,MAO Dan1,LIU Min1, et al. Probability characteristics and extreme POT estimation of wind pressure coefficient of high-rise building envelope[J]. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(1): 224-231.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2023/V42/I1/224

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