Wind and Structures

Techno-Press (테크노프레스)
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Field measurement and CFD simulation of wind pressures on rectangular attic

  • Peng, Yongbo (State Key Laboratory of Disaster Reduction in Civil Engineering & Shanghai Institute of Disaster Prevention and Relief, Tongji University) ;
  • Zhao, Weijie (College of Civil Engineering, Tongji University) ;
  • Ai, Xiaoqiu (Shanghai Institute of Disaster Prevention and Relief, Tongji University)
  • Received : 2018.11.27
  • Accepted : 2019.05.30
  • Published : 2019.12.25
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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.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China

The financial supports from the National Key R&D Program of China (Grant No. 2017YFC0803300), the National Natural Science Foundation of China (Grant Nos. 51878505, 51725804 and 51538010) and the Ministry of Science and Technology of China (Grant No. SLDRCE19- B-26) are highly appreciated. The authors are grateful to Ms. Shifen Wang for her help in preparing the present paper.

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