Nonstationary Turbulent Wind Speed Models and Their Effects on Wind-Induced Responses of Tall Buildings

被引:0
作者
Cai, Kang [1 ,2 ,3 ]
Huang, Mingfeng [1 ,4 ]
Dong, You [2 ]
Liao, Sunce [1 ]
Ni, Yi-Qing [2 ,3 ]
Chan, P. W. [5 ]
机构
[1] Zhejiang Univ, Inst Struct Engn, Coll Civil Engn & Architecture, Hangzhou 310058, Peoples R China
[2] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China
[3] Natl Engn Res Ctr Rail Transit Electrificat & Auto, Hong Kong Branch, Hong Kong, Peoples R China
[4] Guangxi Univ, Sch Civil Engn & Architecture, Nanning 530004, Peoples R China
[5] Hong Kong Observ, Hong Kong, Peoples R China
基金
中国国家自然科学基金;
关键词
Nonstationary wind speed model; Turbulence intensity; Turbulence integral length scale; Wind spectrum; Structural response; SIMULATION;
D O I
10.1061/JSENDH.STENG-14070
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
There exist so many approaches to extract the time-varying mean (TVM) of nonstationary wind speeds under the nonstationary wind speed model, such as the wavelet transform and empirical model decomposition. These approaches yield different fluctuating wind components, resulting in significant differences in related wind parameters of fluctuating wind speeds (e.g., turbulence intensity, turbulence integral length scale, and wind spectrum). Meanwhile, compared to the stationary wind speed model, the nonstationary wind speed model would lead to different predictions of wind loads and wind-induced responses of a tall building even under the same wind field. This paper first derives the theoretical relationships of statistical parameters between stationary and nonstationary wind speed models, including turbulence intensity, turbulence integral length scale, and turbulence wind spectrum across different models. Wind speed data recorded during Typhoon Mangkhut from September 15 to September 18, 2018, are analyzed to validate the derived relationships. The analysis results confirm that the turbulence intensities and turbulence integral length scales of fluctuating wind speed components under the nonstationary wind speed model are generally smaller than those under the stationary wind speed model. The response analyses of an actual tall building were conducted under Typhoon Mangkhut utilizing various wind speed models. Significant disparities in structural responses are observed between the simulated stationary and nonstationary wind conditions. This result indicates that for typhoon wind fields with noticeable nonstationary properties, the conventional stationary wind speed models may not adequately capture the full dynamic wind effects on tall buildings. Besides, improper extraction of the TVM and subsequent simulation of the nonstationary wind velocity field can lead to substantial discrepancies between the calculated structural responses and the true values. It is thus necessary to establish a nonstationary wind speed model with a proper TVM for the wind-resistant design of tall buildings under typhoons or other nonsynoptic wind environments.
引用
收藏
页数:17
相关论文
共 36 条
  • [11] Simulation of ergodic multivariate stochastic processes
    Deodatis, G
    [J]. JOURNAL OF ENGINEERING MECHANICS, 1996, 122 (08) : 778 - 787
  • [12] ESDU (Engineering Sciences Data Unit), 1985, Characteristics of atmospheric turbulence near the ground, Part II: Single point data for strong winds (neutral atmosphere)
  • [13] Gurley K, 1997, J WIND ENG IND AEROD, V71, P657
  • [14] Holmes J. D., 2005, P 10 AM C WIND ENG 1
  • [15] Typhoon-induced non-stationary buffeting response of long-span bridges in complex terrain
    Hu, Liang
    Xu, You-Lin
    Huang, Wen-Feng
    [J]. ENGINEERING STRUCTURES, 2013, 57 : 406 - 415
  • [16] Predicting of tall building response to non-stationary winds using multiple wind speed samples
    Huang, Guoqing
    Chen, Xinzhong
    Liao, Haili
    Li, Mingshui
    [J]. WIND AND STRUCTURES, 2013, 17 (02) : 227 - 244
  • [17] Cross Correlations of Modal Responses of Tall Buildings in Wind-Induced Lateral-Torsional Motion
    Huang, M. F.
    Chan, C. M.
    Kwok, K. C. S.
    Hitchcock, P. A.
    [J]. JOURNAL OF ENGINEERING MECHANICS, 2009, 135 (08) : 802 - 812
  • [18] Multi-scale simulation of typhoon wind field at building scale utilizing mesoscale model with nested large eddy simulation
    Huang, Mingfeng
    Liao, Sunce
    Lou, Wenjuan
    Lin, Wei
    Kareem, Ahsan
    [J]. JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS, 2024, 249
  • [19] [黄铭枫 Huang Mingfeng], 2020, [建筑结构学报, Journal of Building Structures], V41, P63
  • [20] Probabilistic assessment of vibration exceedance for a full-scale tall building under typhoon conditions
    Huang, Mingfeng
    Xu, Qing
    Xu, Haiwei
    Ni, Yi-Qing
    Kwok, Kenny
    [J]. STRUCTURAL DESIGN OF TALL AND SPECIAL BUILDINGS, 2018, 27 (15)