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Wind and Structures Volume 40, Number 6, June 2025 , pages 475-490 DOI: https://doi.org/10.12989/was.2025.40.6.475 |
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Effects of approach flow conditions and design wind speeds on the aerodynamic performance of staggered double corner recession strategies for high-rise buildings |
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Wei-Ting Lu, Brian M. Phillips and Zhaoshuo Jiang
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| Abstract | ||
| Approach flow conditions and design wind speeds have significant effects on the aerodynamic behavior of high-rise buildings. However, the discussion on this topic is limited. To fill the gap, this study investigates the effects of both the approach flows and design wind speeds on tall buildings with various corner geometries. Six staggered double corner recession (SDCR) models were tested using high-frequency force balance (HFFB) wind tunnel testing under suburban and open terrain conditions. The structural responses (overturning moment, roof drift, and roof acceleration) for each model were examined considering a broad range of design wind speeds. The results indicate that the roof drifts for SDCR models are reduced by more than 50% for design wind speeds higher than 70 m/s. However, the effectiveness is significantly decreased as wind speed decreases due to the shift of vortex shedding frequency. The structural responses could be amplified as high as by 40% in comparison with the benchmark model at wind speeds of 40 m/s to 50 m/s. These adverse behaviors are more significant under open terrain condition (low turbulence intensity). In the end, practical suggestions are made to achieve a successful and conservative wind design for high-rise buildings. | ||
| Key Words | ||
| aerodynamic performance; corner modification; high-frequency force balance testing; high-rise buildings; terrain condition | ||
| Address | ||
| Wei-Ting Lu:Department of Mechanical and Electromechanical Engineering, National Sun Yat-sen University, Kaohsiung 80424, Taiwan Brian M. Phillips:Department of Civil and Coastal Engineering, University of Florida, Gainesville, FL 32611, U.S.A. Zhaoshuo Jiang:School of Engineering, San Francisco State University, San Francisco, CA 94132, U.S.A. | ||