Study on wind loads and wind-induced responses of rectangular tall buildings with structural joints
Structural joints are required for rectangular tall buildings with large length-to-width ratios.Despite the presence of joints,the wind pressure distribution on the building is still affected by the overall building shape.Additionally,the wind loads and wind-induced responses of individual building units can differ significantly when a single and uninterrupted building is compared.In order to investigate the wind loads and wind-induced vibrations of building units in structures with joints,synchronous wind tunnel tests were conducted on rectangular tall buildings with length-to-width ratios of 6 and 9,each with one or two structural joints along the long sides.The three-force coefficients,power spectra,and overall shape coefficients of different building units in orthogonal wind directions were analyzed.Furthermore,the wind-induced responses of different units using the same structural parameters were calculated to explore their variations with wind direction angles.The spectral characteristics of these responses in orthogonal wind directions were also examined.The results show that significant differences exist in aerodynamic coefficients and aerodynamic spectra among different building units,with greater disparities observed when the shorter sides face the wind.When considering a 360° wind direction scenario,the overall shape coefficient of the building units on both sides of the structurally gapped buildings are smaller than those of a single building with an equivalent length-to-width ratio.The overall shape coefficient of the intermediate building unit is similar to that of the single building.The lateral responses of the building units on both sides are smaller than those of a single building.The torsional responses of these gapped buildings are slightly greater than those of the single building.However,the lateral and torsional responses of the intermediate building unit are significantly smaller than those of the single building.Therefore,for structurally gapped rectangular high-rise buildings,the lateral force-resisting components of different building units should be arranged differently.
万方数据
维普
