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Wind and Structures Volume 35, Number 6, December 2022 , pages 369-383 DOI: https://doi.org/10.12989/was.2022.35.6.369 |
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Characteristics, mathematical modeling and conditional simulation of crosswind layer forces on square section high-rise buildings |
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Ailin Zhang, Shi Zhang, Xiaoda Xu, Yi Hui and Giuseppe Piccardo
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| Abstract | ||
| Wind tunnel experiment was carried out to study the cross-wind layer forces on a square cross-section building model using a synchronous multi-pressure sensing system. The stationarity of measured wind loadings are firstly examined, revealing the non-stationary feature of cross-wind forces. By converting the measured non-stationary wind forces into an energetically equivalent stationary process, the characteristics of local wind forces are studied, such as power spectrum density and spanwise coherence function. Mathematical models to describe properties of cross-wind forces at different layers are thus established. Then, a conditional simulation method, which is able to ex-tend pressure measurements starting from experimentally measured points, is proposed for the cross-wind loading. The method can reproduce the non-stationary crosswind force by simulating a stationary process and the corresponding time varying amplitudes independently; in this way the non-stationary wind forces can finally be obtained by combining the two parts together. The feasibility and reliability of the proposed method is highlighted by an ex-ample of across wind loading simulation, based on the experimental results analyzed in the first part of the paper. | ||
| Key Words | ||
| conditional simulation; cross-wind loading; high-rise building; mathematical modeling; non-stationary forces | ||
| Address | ||
| Ailin Zhang and Shi Zhang:School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, No.1 Zhanlanguan Road, Xicheng District 100044 Beijing, China Xiaoda Xu:Central Research Institute of Building and Construction CO., LTD. MCC, No.33 Xitucheng Road, Haidian District 100088 Beijing, China Yi Hui:School of Civil Engineering, Chongqing University, No. 83 Shabei Street, Shapingba District, 400045 Chongqing, China Giuseppe Piccardo:Department of Civil, Chemical and Environmental Engineering – DICCA, University of Genoa, Via Montallegro, 1, 16145 Genoa, Italy | ||