Study of wind-induced forces on high-rise buildings under interference conditions

Abstract

The study investigates the altered wind pressure distribution resulting from modifications in wind flow patterns due to the presence of an interfering building. The primary focus centers on a prominent high-rise building with a rectangular cross section measuring 25 m × 50 m. An obstructing building, sharing the same cross-sectional shape but varying in height, is strategically positioned in front of the principal building, aligning their across-wind lengths. Maintaining the principal building’s fixed position, the spacing between the two buildings is systematically varied to shed light on the impact of variations in height and spacing on wind loads and pressures. To comprehensively assess these effects, two distinct types of measurements were conducted: (1) Force Measurement and (2) Pressure Measurement. To ensure the reliability of findings, a rigorous comparison was later conducted between the results obtained from these two independent measurements. The force measurement results are presented as two-dimensional X–Y plots. These results reveal that the interference effect diminishes as the height of the obstructing building is increased, as well as when the spacing between the two structures is increased. Conversely, analysis of pressure contours paints a more detailed picture, with wind pressure coefficient (C_P) contour plots on all vertical surfaces of the principal building. This study underscores the intricate relationship between building spacing, height variation, and wind-induced pressures, offering valuable insights into the design and optimization of high-rise structures in areas prone to complex wind patterns.