Experimental study of the neighborhood effects on the mean wind loading over two equivalent high-rise buildings

Abstract

This paper presents a series of results with respect to the mean values of shear, base moment and torsion acting in a building obtained through an experimental wind tunnel study using the standard building proposed by the Commonwealth Advisory Aeronautical Research Council CAARC as building reference. In the loading determination, the interference of a neighboring building with similar geometric characteristics to the CAARC was simulated, considering variations of positioning and spacing in relation to the reference building. It was concluded that the presence of the neighboring building increased the mean loads in the reference building for a significant number of directions considered. In the case of the considered deviations and the proposed provisions by this study, it was concluded that the vicinity factor that would contemplate the majority of the results obtained in the tests should increase the wind loads by at least 60% in relation to the values obtained for the building reference considered in isolation.

Numerical-experimental study of neighboring wind effects on tall buildings related to serviceability via reliability

“…Figure 2 depicts the standardized CAARC full-scale building with the arrangement of the 280 pressure plug indicators, in which the base center coincides with the building's vertical axis. More details can be seen in [19] and [20]. The building has a flat horizontal roof without parapet, with smooth facades and no geometric particularities, and dimensions of 100 ft x 150 ft x 600 ft (base dimensions and height), equivalent to 30.48 m x 45.72 m x 182.88 m [27].…”

“…With the raise of neighborhoods, determined by the sort of arrangement, wind protection effects or even more motions can be generated in a pre-existing building due to reconfiguration of the wind flow (Blessmann [10], [11], Blessmann and Riera [12], [13]). Studies have shown, with use of reduced scale models in wind tunnel, such as Yu et al [14], Hui et al [15], Fontoura [16], Kim et al [17], [18], Vieira et al [19], [20], Lavôr [21], among others, that the presence of buildings in the neighboring regions results in modifications of wind forces, pressures and aerodynamic coefficients.…”

Experimental study on the interference intensity produced by the presence of neighboring buildings in the wind action in a tall building

“…Recently, [5] also verified that the rise in strain due to the presence of neighboring buildings in the wind action direction are different of those foreseen in Brazilian standards. Proceeding in this line of study, [6] also observed the elevation of strain through a statistics evaluation considering the presence of a single neighboring building. The results of these studies performed over ten years caused some standards to establish forms of considering the effects caused by neighboring buildings.…”

Interference effects mapping on the static wind loading of a tall building

“…One of the wind effects that is considered in structural designs is the interference effects due to surrounding buildings. Some researchers in the past have also investigated and indicated the importance of the interference effect, analyzing parameters such as the number of interfering buildings and its locations, simulated wind characteristics and its angle of incidence, terrain roughness, relative dimensions of buildings, modal frequency, mode shapes, Scruton number and Strouhal number (Gu et al (2005), Vieira et al (2018), Lo et al (2020), Fontes-Silva et al (2022)).…”