Comparison between multinational criteria for stability of steel arch bridges

摘要

Multinational criteria for stability of steel arch bridge were analyzed. Inadequacies of criteria were discussed briefly. According to multinational criteria, the influence of rise to span ratio on in-plane critical flexure load, and rise to span ratio, the ratio y of the length of the arch part stiffened by lateral braces to the total length of the arch rib and arch rib spacing affecting on the out-of-plane critical flexure load were studied by employing a steel arch bridge. The results show that due to the different assumptions in multinational criteria, the parameters of rise to span ratio, y -value and arch rib spacing has different influence on in-plane and out-of-plane critical flexure load, respectively.