Modern high-rise building façades often feature local elements such as sunshades and vertical decorative strips, and corner areas of buildings commonly adopt design measures like rounding or curving. The influence of these common architectural design features on wind loads cannot be ignored, and the current code needs to be improved., This paper takestook the CAARC high-rise building standard model as the research object, and studied the influence of rough strips and rounded corner on the wind load of the structure through a series of rigid model pressure measurement wind tunnel tests and high-frequency balance force tests. The studies show that: 1) Under the smooth model condition, with the increase of rounding angle from 0% to 10%, the absolute value of the peak negative pressure in the corner area of the windward surface of the building will gradually increase, and with the maximum increase is of about 38.4%; The global body shape coefficients of the structure will gradually decrease, and the maximum reduction of the global body shape coefficients in the X direction and Y direction is about 26.3% and 39.9%, respectively. 2) Under the condition of arranging vertical or grid rough strips with a thickness of 1.5 mm on the surface of the model, it is beneficial to reduce the absolute value of the peak negative pressure in the corner and middle of the structure, with a maximum reduction of 13.68%; For the global body shape coefficients of the structure, the rough strip model is slightly lower than the smooth mode. 3) The influence of arranging rough strips and rounded corner on wind pressure of building corner areas is not a simple superposition relationship. When both rough strips and rounded corner are arranged, the absolute value of the peak negative pressure in the corner area increases, with a maximum increase of 45.1%. 4) After the installation of roughness elements or the rounding of corner areas, the peak value of the crosswind power spectrum decreases, and the dimensionless frequency corresponding to the spectral peak increases.

Rough strips such as curtain wall skeletons affiliated with the outer curtain wall envelopes of super high-rise buildings will change the flow pattern around the building, thereby affecting the wind loading characteristics of the buildings. However, the current Chinese building structural load code lacks relevant regulations in this regard. Given this, a systematic comparative study on a typical super high-rise building was performed under the two conditions of with and without the rough strips on the building surface by means of the HFPI (High Frequency Pressure Integration) test. By analyzing the changes of the wind loading characteristics such as wind pressure coefficient, base overturning moment and structural shape factor of wind load, the effect of rough strips on the wind load of the super high-rise building structure was studied. The results show that: setting of rough strips has little effect on the positive pressure on the building surface, but it will significantly reduce the absolute value of the peak negative pressure, with a maximum decline of about 39.8%; it will significantly affect the wind pressure distribution in the building corner area and lateral sides, leading to the significant reduction of the mean wind pressure coefficient and fluctuating wind pressure coefficient in the lateral sides, and the maximum decline is 24% and 30%, respectively. Overall, setting rough strips is beneficial to the wind-resist design of the building claddings. Setting of rough strips will affect the overall wind load of the structure. At a positive blowing angle of 0°, the rough strips will slightly increase the structural shape factor of the wind load in sections along the height of the building, with a maximum increase of about 8%, and the base overturning shear force and base overturning bending moment of the X-axis will slightly increase by 4.9% and 6.0%, respectively. Setting the rough strips has an impact on the wind angle of the peak acceleration at the top of the building, and can reduce the peak acceleration by about 7.91%.

The high extreme negative pressure that occurs in the corner area of the roof of a low-rise building is the focus of the wind-resistant design of its envelope. Based on the aerodynamic principle and the standard building model of TTU (Texas Tech University), this paper designed a new streamlined add-on accessories in the corner area of roof according to the wind flow patterns in the roof corner. By altering parameters such as the height and length of additional components, it conducted a comparative study involving rigid model pressure measurements in wind tunnel tests under 10 working conditions and Large Eddy Simulation (LES). The study aimed to explore the impact of these new types of additional components on wind loads in roof corner zones, aerodynamic optimization for wind resistance of roofs, and the accuracy of LES simulations. The study shows that: 1) the wind tunnel test results show that the installation of add-on accessories in the roof corner area can effectively reduce the extreme negative pressure in the corner area, and the most unfavorable mean negative pressure in the roof corner area can be reduced by 10%, and the most unfavorable extreme negative pressure can be reduced by 25% under the 10 working conditions studied; 2) the NSRFG (Narrowband Synthesis Random Flow Generation) method is used to generate the inlet turbulence, and the wind load distribution pattern in the TTU model under various conditions is obtained by the LES simulation. Although the absolute value of the mean wind pressure coefficient of the roof under some working conditions simulation results are larger (the mean error is 13.88%), and the extreme wind pressure coefficient is smaller (the mean error is 9.72%), it is overall consistent with the wind tunnel test, indicating that the NSRFG method has good accuracy; 3) LES numerical simulation parameter study shows that the influence of the length of the add-on accessories on the wind load in the roof corner area is greater than that of the height, the extreme wind pressure coefficient in the roof corner area decreases by 6.15% after the height of the equal length add-on accessories increase by 1 times; the extreme wind pressure coefficient in the roof corner area decreases by 10.77% after the length of the equal height add-on accessories increase by 0.8 times.