Aerodynamic correlation of linked buildings

This paper investigates the intra-building and inter-building aerodynamic correlations of linked buildings (LBs, i.e., adjacent tall buildings structurally connected by links such as skybridges, skypools and skygardens). Spatiotemporal wind pressure data on a few typical LBs with different gap distances are used to examine the two aerodynamic correlations. The intra-building aerodynamic correlation is examined using correlation coefficients and trajectories between wind force components on the building. Results show that the intrabuilding aerodynamic correlations for the LBs differ considerably from that for the isolated building, especially in the correlation between along-wind and torsional force components. The inter-building aerodynamic correlation is then presented in terms of the correlation coefficients between local wind force components and between generalized force components of the two buildings. The along-wind inter-building correlation is found to decrease with increasing gap distance, whereas the variation of cross-wind inter-building correlation is more complicated. In addition, it is illustrated that the wind-induced response of the LB is related positively to the correlation coefficient between the generalized force components of the two buildings in the associated unlinked case

Wind pressure characteristics for a double tower high-rise structure in a group of buildings

Wind pressure characteristics on a double tower high-rise structure, which is disturbed by surrounding buildings, were investigated using large eddy simulation (LES) and 1:300 scale wind tunnel experiments. The computational simulation technique and wind tunnel experimental technique were described in detail initially. Comparisons of computational results with the experimental data have subsequently been carried out to validate the reliability of LES. Comparisons have been performed in detail for the mean and fluctuating pressure coefficients. Detailed explanations of each comparison were given in the paper. To study further on the pressure coefficients on the building surfaces, parametric studies on shape coefficient and spatial correlation were performed and investigated. The numerical and experimental results presented in this paper advance understanding on wind field around buildings and the application of LES and wind tunnel tests. © 2013 Techno-Press, Ltd