Wind-induced Response and Vibration Damping Analysis of Large-span Grid Structures Considering Fluid–structure Interaction

Abstract

The roofs of long-span grid structures are particularly sensitive to wind effects when subjected to wind loads. The present study demonstrates wind-induced response variations due to wind load on the grid structure through CFD (Computational Fluid Dynamics) simulation. In the present study, models with different wind incidence angles (0°,30°, 60°, and 90°) as well as models with varying positions of viscous-elastic dampers are investigated. The results indicate that accounting for fluid–structure interaction affects both wind direction and speed. In the mid-span area of the grid structure, where wind-induced response is significant, fluid–structure interaction has a pronounced impact. Furthermore, the addition of viscous-elastic dampers can reduce the wind-induced response of the existing grid structure, and adding them at positions where the wind-induced response is larger has a more obvious damping effect, resulting in a vibration damping coefficient of 29.09% for the center node displacement.