Analysis on The Collapse of The Large-span Roof Grid of A Gymnasium

Abstract

In this paper, the method of combining on-site detection and numerical simulation analysis is used to analyze the causes of collapse accidents during the hoisting process of the grid.On-site detection found that the welding sequence of the support was unreasonable, the embedded plate and the support column, the embedded plate and the support top plate did not form an effective connection, and the embedded plate was missing. Based on the numerical simulation, the hoisting scheme and the force of the grid after the hoisting unit is in place are analyzed. The results show that, during the hoisting process and after the hoisting is completed, some of the rods in the grid system do not meet the strength and overall stability requirements.