Abstract
The present paper investigates analytically the effect of load position on the lateral buckling of fixed parabolic arches. The arches are subjected to uniformly distributed load of a bridge deck which is either at springing level or at crown level. In the former case the loads are transferred through hangers and in the latter through columns. The hangers or the columns are assumed to be closely spaced and hinged at their ends. The critical loads of the arches are calculated by solving the governing differential equations numerically. It is found that the load position does affect the critical buckling load of arches. However, the effect is more appreciable in case of arches having lower ratios of torsional rigidity to lateral flexural rigidity of the arch cross-section with decks at the crown level.
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