Buckling design of steel tied-arch bridges

摘要

The structural behaviour of steel tied-arch bridges is determined by the introduction of a large compressive force. As a consequence, slender steel arches are highly sensitive to in-plane as well as out-of-plane buckling. At present, no specific buckling curves for out-of-plane buckling exist for non-linear or curved elements in the international codes and calculation methods. Hence, the buckling curves for straight columns, as determined by ECCS, are used, which leads to considerable inaccuracies in the assessment of the critical buckling load for arch bridges.