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Interference Effects Between Twin Tall Buildings Under Wind Excitation
More and more closely spaced twin tall buildings are being constructed due to a land shortage, which creates a very complex wind flow around these buildings. The characteristics of wind loads on twin-tall buildings are very different from those isolated buildings. Guidelines to estimate wind effects on tall buildings in codes and standards are available for isolated buildings only, necessitating a detailed study of tall buildings in interference condition, experimentally or numerically, for wind loads. This paper presents the results of an experimental study in a wind tunnel on twin tall square buildings present in close proximity. Models are tested at a geometric model scale of 1:300 in an open circuit boundary layer wind tunnel in isolated and interference conditions. Interference conditions are created by placing the interfering building in front of the principal building to provide different wind blockage as full, half and no blockage. Based on the results, mean wind pressure coefficients are presented for isolated as well as interference conditions. Interference factors (IF) are also plotted along the vertical centreline at all surfaces for all three interference conditions. Results show that pressure distribution is greatly affected by interfering building at different positions with respect to the principal building. The pressure at the front face of the isolated building is positive and changes to suction due to the presence of the interfering building in full and half blockage positions. Suction on the side faces and leeward face reduce significantly at full and half blockage positions. Results may be useful while designing the tall twin buildings for wind loads.
Interference Effects Between Twin Tall Buildings Under Wind Excitation
More and more closely spaced twin tall buildings are being constructed due to a land shortage, which creates a very complex wind flow around these buildings. The characteristics of wind loads on twin-tall buildings are very different from those isolated buildings. Guidelines to estimate wind effects on tall buildings in codes and standards are available for isolated buildings only, necessitating a detailed study of tall buildings in interference condition, experimentally or numerically, for wind loads. This paper presents the results of an experimental study in a wind tunnel on twin tall square buildings present in close proximity. Models are tested at a geometric model scale of 1:300 in an open circuit boundary layer wind tunnel in isolated and interference conditions. Interference conditions are created by placing the interfering building in front of the principal building to provide different wind blockage as full, half and no blockage. Based on the results, mean wind pressure coefficients are presented for isolated as well as interference conditions. Interference factors (IF) are also plotted along the vertical centreline at all surfaces for all three interference conditions. Results show that pressure distribution is greatly affected by interfering building at different positions with respect to the principal building. The pressure at the front face of the isolated building is positive and changes to suction due to the presence of the interfering building in full and half blockage positions. Suction on the side faces and leeward face reduce significantly at full and half blockage positions. Results may be useful while designing the tall twin buildings for wind loads.
Interference Effects Between Twin Tall Buildings Under Wind Excitation
Lecture Notes in Civil Engineering
Das, B. B. (editor) / Gomez, Christy P. (editor) / Mohapatra, Benu. G. (editor) / Nagar, Suresh Kumar (author) / Raj, Ritu (author) / Dev, Nirendra (author)
2022-04-25
8 pages
Article/Chapter (Book)
Electronic Resource
English
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