Interference effects on wind-induced coupled motion of a tall building

Interference effects from neighbouring buildings on wind-induced coupled translational–torsional motion of tall buildings have been investigated through a series of wind tunnel aeroelastic model tests. Interference effects on the CAARC standard tall building by an 8:1:1 tall interfering building both upstream and downstream were investigated. The results indicated a significant increase in responses at the critical wind speed where the frequency of the shed vortices originated from the interfering building coincides with the modal natural frequency of vibration of the principal tall building. The along-wind, cross-wind, and twisting moment responses of the principal building were significantly increased when the interfering building was located diagonally upstream. A more substantial increase in responses was evident when the interfering building was located directly upstream from the principal building.