Experimental study of wind-induced shear, bending, and torsional loads on rectangular tall buildings

Abstract

To investigate wind-induced torsional loads on rectangular tall buildings, five rigid scale models were tested in an atmospheric boundary layer wind tunnel. Each model was built with identical plan dimensions but different aspect ratios. Two terrain categories were experimentally simulated in the wind tunnel to evaluate each model under different wind directions. From synchronized wind pressure measurements, the values for the shear wind force, bending moment, and torsion moment at the base of each model were calculated. The results were normalized in terms of mean shear, bending, and torque coefficients. Variations of the coefficients obtained with respect to the aspect ratio of the models tested were analyzed. Based on the experimental results, a new parametric equation to estimate the torque coefficients at the base of rectangular tall buildings as a function of aspect ratio and wind direction was proposed. The base torque coefficients obtained with the proposed equation are in good agreement with the experimental results.

Wind-induced torsional loads and responses of tall buildings

“…Guzmán-Solís et al [37] tested five rigid scale models in an atmospheric boundary layer wind tunnel to study wind-induced torsional loads on rectangular tall buildings. Each model had the same plan dimensions as the others, but different height aspect ratios.…”

“…The Mean and RMS base torsion coefficient are functions of incident wind direction. Guzmán-Solís et al [37] proposed a new parametric equation based on extensive experimental wind tunnel data as shown in Table 2.…”

“…7. The 3D plot depicts the variation of the mean torsion coefficient with respect to aspect ratio and wind direction, presenting outcomes derived from the proposed equation by Guzmán-Solís et al [37] The variation of CT has been plotted in Fig. 7 with respect to wind direction as well as height aspect ratio.…”

Use of Artificial Neural Networks to Predict Wind‐Induced External Pressure Coefficients on a Low‐Rise Building: A Comparative Study

“…e pressure scanners were set with a sampling rate equal to 256 Hz and a sampling time of 21 s. Wind direction (θ) was varied within −90 °to 90 °with increments of 10 °; additional angles of 45 °and −45 °were also considered (Figure 8). From the experimental tests, a total of 1125 time-history records of EPC were registered and processed to calculate mean EPC (EPCmean), maximum EPC (EPCmax), minimum EPC (EPCmin), root mean square of EPC (σ), and variance of EPC (σ 2 ), which are typical measures to evaluate the windinduced forces in structures [1]. With the information processed and organized, an experimental input and output database was assembled, which included EPCmean, EPCmax, EPCmin, σ, and σ 2 values, which were associated with predefined θ values and coordinates (x, y) for each tap (Figure 8).…”

“…e study of wind e ects on low-rise buildings is carried out by using the wind-induced pressure distribution over the structure. is pressure distribution can be calculated from experimental wind tunnel tests [1] or by using computational wind engineering [2]. Based on the pressure distribution, international wind design codes and standards propose the use of external pressure coe cients (EPC) in order to calculate the wind-induced forces.…”