The Effect of Asymmetrical Loads on the Structural Performance of Large-Span Anomalous Single-Layer Reticulated Shell

Aiming at the background of a large-span anomalous single-layer reticulated shell,the general purpose finite element method program ANSYS was used to model and emphatically simulate several asymmetrical static loads of the shell structures,such as wind load,snow load and temperature effect.Then static analysis,eigenvalue buckling analysis and nonlinear stability analysis were made to analyze the relative mechanical performance of the shells.The internal force and displacement results under fifteen traditional load combinations were obtained and the effect of asymmetrical loads on static behavior was studied.Taking into account the influence of geometrical nonlinearity,material nonlinearity,initial geometrical imperfection,the stability factors of the shell structure under asymmetrical load were calculated.The influence of asymmetrical loads on nonlinear stability properties were investigated.The purposes of this paper were to emphasize the importance of asymmetrical loads analysis in the design of a long-span anomalous single-layer reticulated shell and to offer a reference.