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Wind and Structures Volume 24, Number 5, May 2017 , pages 501-528 DOI: https://doi.org/10.12989/was.2017.24.5.501 |
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Characteristics of the aerodynamic interference between two high-rise buildings of different height and identical square cross-section |
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Huang Dongmei, Zhu Xue, He Shiqing, He Xuhui and He Hua
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| Abstract | ||
| In this work, wind tunnel tests of pressure measurements are carried out to assess the global aerodynamic interference factors, the local wind pressure interference factors, and the local lift spectra of an square high-rise building interfered by an identical cross-sections but lower height building arranged in various relative positions. The results show that, when the interfering building is located in an area of oblique upstream, the RMS of the along-wind, across-wind, and torsional aerodynamic forces on the test building increase significantly, and when it is located to a side, the mean across-wind and torsional aerodynamic forces increase; In addition, when the interfering building is located upstream or staggered upstream, the mean wind pressures on the sheltered windward side turn form positive to negative and with a maximum absolute value of up to 1.75 times, and the fluctuating wind pressures on the sheltered windward side and leading edge of the side increase significantly with decreasing spacing ratio (up to a maximum of 3.5 times). When it is located to a side, the mean and fluctuating wind pressures on the leading edge of inner side are significantly increased. The three-dimensional flow around a slightly-shorter disturbing building has a great effect on the average and fluctuating wind pressures on the windward or cross-wind faces. When the disturbing building is near to the test building, the vortex shedding peak in the lift spectra decreases and there are no obvious signs of periodicity, however, the energies of the high frequency components undergo an obvious increase. | ||
| Key Words | ||
| tall buildings; wind tunnel pressure measurements; global aerodynamics interference factor; local wind pressure interference factor; local lift spectra | ||
| Address | ||
| Huang Dongmei and He Xuhui: School of Civil Engineering, Central South University, Changsha 410075, China; High-speed Railway Construction Technology National Engineering Laboratory, Changsha 410075, China Zhu Xue, He Shiqing and He Hua: School of Civil Engineering, Central South University, Changsha 410075, China | ||