Influence of Fatigue Damage on Criticality Cell Ultimate Load Capacity of Steel–Concrete Composite Section

In order to investigate the impact of fatigue damage on ultimate load capacity criticality cells in steel–concrete composite segments and address complex design challenges associated with bridge practical engineering, this study designs two scaled cell specimens a scale ratio 1:2 performs tests after cyclic loading. By analyzing stress distribution each component force transmission combining results from finite element model calculations, introduces degree structural proposes predictive for segment that is easy apply. This compared calculation experimental values, are found be good agreement. Additionally, number shear connection members optimized based results. The research findings indicate main failure mode inclined compression failure. strength part decreases following order: segment, steel structure concrete segment. Furthermore, has significant cells. exhibits similar performance original provides reference engineering.