Abstract
The out-of-plane elastic buckling behavior of I-section circular arches with web openings under radial uniform load, accounting for plate local buckling, is simulated and analyzed by finite element software ABAQUS. The buckling loads at different rise-to-span ratio, the height-to-thickness ratio of the web, hole radius and spacing are calculated. The results show that the out-of-plane buckling load decreases with the increase of hole radius and increases with the increase of hole spacing. By establishing the hole optimization function and adopting the modified dimensionless elastic buckling load, it is found that the structure has the highest efficiency when the hole radius is between 25% and 35% of the web height, and the hole spacing is between 30% and 50% of the web height.
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