# Effects of Corner Modification on the Wind-Induced Responses of High-Rise Buildings
## 2 Experiment Setup  
A high-rise building in Zhejiang, China is investigated to illustrate the process, which has a height of 318 m and a width of 44 m. The HFFB technique with four corner modifica \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Reference**} & \multirow{2}{*}{
\begin{tabular}{c} **Corner** \\ **Modification** \\ \end{tabular} } & \multirow{2}{*}{**Method**} & \multicolumn{4}{c}{**Parameters Involved**} \\ \cline{4-7}  & & & **Pressure** & **Base** & **Aerodynamic** & **Wind-Induced** \\  & & & **Coefficient** & **Force** & **Spectrum** & **Response** \\ \hline [PERSON] et al. [6] & CH, RE, RO & HFFB & & \(\surd\) & \(\surd\) & \\ [PERSON]. [PERSON] et al. [7] & CH, RE & HFFB & & & \(\surd\) & \(\surd\) \\ [PERSON] et al. [8; 9] & CH, RO, RE & HFFB & & \(\surd\) & & \(\surd\) \\ [PERSON] et al. [10] & RE & SPI & & \(\surd\) & & \(\surd\) \\ [PERSON] et al. [11] & RE & SPI & & \(\surd\) & \(\surd\) & \(\surd\) \\ [PERSON] et al. [2] & CH, RO, RE & SPI & \(\surd\) & \(\surd\) & \(\surd\) & \(\surd\) \\ [PERSON] [12] & CH, RE, RO & AE & & & & \(\surd\) \\ [PERSON] et al. [13] & CH, RE & AE & & & & \(\surd\) \\ [PERSON] et al. [14] & CH, RO, RE & AE & & & & \(\surd\) \\ [PERSON] et al. [15] & CH, RE & CFD & \(\surd\) & \(\surd\) & & \\ [PERSON] et al. [16] & RE & CFD & \(\surd\) & & \(\surd\) & \(\surd\) \\ [PERSON] et al. [17] & RO, CH & CFD & \(\surd\) & & & \\ [PERSON] [18] & RO & CFD & \(\surd\) & & & \\ [PERSON] [19] & RE & CFD & \(\surd\) & \(\surd\) & \(\surd\) & \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Summaries of the studies on corner modifications of high-rise building. tions is employed to carry out the aerodynamic optimization. The HFFB models and the surrounding buildings within a diameter range of 1000 m were fabricated at a geometric scale of 1:400. Wind tunnel tests were conducted in the ZD-1 boundary layer wind tunnel at Zhejiang University, China. The wind tunnel has a testing section 4.0 m wide and 3.0 m high. The geometrical scale ratio is carefully determined to ensure a small blockage ratio so as to diminish the distortion effects caused by the blockage in the testing section. It is found that the largest blockage ratio is less than 4.5%, indicating that the distortion effects on the flow in the testing section are negligible [21; 22]. The model setup and wind direction are illustrated in Figure 1. The relative width  
The tests were conducted in the ZD-1 boundary layer wind tunnel at Zhejiang University, China. According to the Chinese code entitled \"Load code for the design of building structures\" [23], the terrain condition around the building is Terrain Category B, which corresponds to the open type terrain. In order to simulate the boundary layer wind field corresponding to Terrain Category B, spires arrays combined with floor roughness elements were employed in the wind tunnel (see Figure 1a). The wind velocities along the height at the center of the turntable were recorded using a three-dimensional Cobra Probe (Turbulent Flow Instrumentation). The mean wind speed \(v\) and turbulence intensity \(I\) profiles of Terrain Category B were tested in the wind tunnel and shown in Figure 2, in which the wind speed normalizes the mean wind speed at 350 m in full scale. It can be seen that the simulated profiles agree well with that regulated in GB 50009-2012 [23]. The HFFB model was mounted on a six-component force balance made by ME-\(\beta\) system company, Germany, with a measurement accuracy of 0.3% F.S. All models were made of lightweight wood, and the first sway frequency of the model-balance system is larger than 40 Hz, which meets the model requirement of the HFFB test. The base overturning moment and dynamic response can be attained after considering the dynamic properties of the building, such as mass and damping [24; 25]. The wind tunnel tests were conducted at wind directions of 0-345\({}^{\circ}\) with an interval of 15\({}^{\circ}\).