Airflow Patterns around Obstacles with Large‐Span Shallow Shell Roof: Wind Tunnel Measurements and Direct Simulation

Abstract

Wind tunnel tests on the rigid model of large-span shallow spherical shell roof structure were carried out. The variation rule and the calculation method for the average shape coefficient of the fluctuating wind pressure under six different typical wind directions were obtained. The wind pressure distribution of the node deflection and cross section stress was numerically investigated and analyzed. Meanwhile, the effect of mechanics-flow form of the typical spherical shell structure on the wind pressure distribution was analyzed quantitatively. In this study, it is found that the results of numerical simulation agree well with the wind tunnel test data. The study on the mechanical characteristics, as well as the wind vibration research, of the spherical shell structure in different working conditions provides a reliable theoretical basis for the mechanical index of the wind vibration.

Deformation and Buckling Analysis of Shallow Conical Shells Based on Improved Model of Wind Load Using Environment Ansys

“…1. The previously developed model [3] of wind load of a shallow thin-walled conical shell has been improved taking into account additional coefficients C1 and C2 based on the parameters presented in normative documents [6,7] for calculating the pressure intensity on the windward and leeward side. shell structures.…”

“…Recommendations for further research. Further studies of shallow conical shells deformation should be carried out in the direction of greater convergence with the real conditions of wind load due to the nonlinear pressure distribution, as for spherical shells [6,7].…”

“…General recommendations for the calculation of shallow conical shells under wind load are given in the normative document [5,6] only for non-shallow conical and spherical shells with an angle of formation α ≥ 20°, while for shallow conical shells α ≤ 20°, which leads to the need of modeling and calculation of wind load on the surface of a shallow conical shell by complex analytical calculation or the use of specialized software and even conducting experiments in the wind tunnel. Similar physical experiments and simulations in a numerical environment were performed for a shallow spherical shell, the ratio of height to the width of the base of which was 1:12 [7].…”

Further Analysis of Non‐Gaussian Wind Pressure Peak Factor Calculation

“…ere are hydrodynamic phenomena such as air separation, reattachment, and vortex. Scholars have explored the characteristics of fluid-induced vibration or flow field [5,6], which is helpful for the research of wind load and wind pressure of high-rise buildings for wind-resistant design. With the progress of the technique for the measurement of unsteady aerodynamic force [7], wind pressure distributions and unsteady aerodynamic characteristics are investigated and analysed [8].…”