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Wind and Structures
  Volume 29, Number 6, December 2019, pages 471-488
DOI: http://dx.doi.org/10.12989/was.2019.29.6.471
 


Field measurement and CFD simulation of wind pressures on rectangular attic
Yongbo Peng, Weijie Zhao and Xiaoqiu Ai

 
Abstract
    Wind pressure is a critical argument for the wind-resistant design of structures. The attempt, however, to explore the wind pressure field on buildings still encounters challenges though a large body of researches utilizing wind tunnel tests and wind field simulations were carried out, due to the difficulty in logical treatments on the scale effect and the modeling error. The full-scale measurement has not yet received sufficient attention. By performing a field measurement, the present paper systematically addresses wind pressures on the rectangular attic of a double-tower building. The spatial and temporal correlations among wind speed and wind pressures at measured points are discussed. In order to better understand the wind pressure distribution on the attic facades and its relationship against the approaching flow, a full-scale CFD simulation on the similar rectangular attic is conducted as well. Comparative studies between wind pressure coefficients and those provided in wind-load codes are carried out. It is revealed that in the case of wind attack angle being zero, the wind pressure coefficient of the cross-wind facades exposes remarkable variations along both horizontal and vertical directions; while the wind pressure coefficient of the windward facade remains stable along horizontal direction but exposes remarkable variations along vertical direction. The pattern of wind pressure coefficients, however, is not properly described in the existing wind-load codes.
 
Key Words
    wind pressure; wind speed; spatial and temporal correlations; field measurement; CFD simulation; rectangular attic
 
Address
Yongbo Peng: State Key Laboratory of Disaster Reduction in Civil Engineering & Shanghai Institute of Disaster Prevention and Relief,
Tongji University, 1239 Siping Road, Shanghai 200092, P.R. China
Weijie Zhao: College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, P.R. China
Xiaoqiu Ai: Shanghai Institute of Disaster Prevention and Relief, Tongji University, 1239 Siping Road, Shanghai 200092, P.R. China
 

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