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Wind and Structures Volume 42, Number 4, April 2026 , pages 493-531 DOI: https://doi.org/10.12989/was.2026.42.4.493 |
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Wind interference study due to spacing variation of a centrally placed rectangular cross-section interfering building |
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Bharat S. Chauhan, Anupam Chakrabarti,
Ashok K. Ahuja, Adal Mengesha Yimer
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| Abstract | ||
| In the current study, the effect of wind interference on a principal building caused by the presence of a centrally located interfering building is investigated through experiments conducted in a boundary layer wind tunnel. The distance between the interfering building and the principal building is gradually changed for five different interfering building heights. Principal and interfering buildings have the same rectangular cross-section with an aspect ratio of 1:3. Force and pressure measurements are undertaken independently. For validation, the outcomes of the two measurements are compared with one another and with the Indian Standards. Results of force measurement are presented in terms of wind interference factors for different parameters, while results for pressure measurement are expressed in terms of mean and RMS wind pressure coefficients (𝐶𝑃 and 𝐶𝑃'). The highest along-wind force reduction is noted to be 55.15% under wind interference conditions compared to that under the stand-alone condition, according to the force measurement results. The force measurement results are appropriately and clearly explained by the contour plots for the mean coefficients of wind pressure. Also, it is seen that the suctions observed on the leeward and the side faces are higher for lower height interfering buildings. The highest 𝐶𝑃 value noted is 38.16% higher than that observed for the stand-alone condition. Probability density functions plotted for critical pressure points at different spacings reveal that 𝐶𝑃 values on the side face reach closer to stand-alone condition faster compared to that on the windward and leeward faces. | ||
| Key Words | ||
| BLWT; height variation; rectangular cross-section tall buildings; spacing variation; wind interference condition | ||
| Address | ||
| Bharat S. Chauhan:1)Heritage and Special Structures Group, CSIR- Central Building Research Institute, Roorkee, Uttarakhand - 247667, India 2)Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India Anupam Chakrabarti:Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand - 247667, India Ashok K. Ahuja:Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand - 247667, India Adal Mengesha Yimer:Department of Civil Engineering, Debre Tabor University, Ethiopia | ||