Abstract：In order to investigate the load transfer mechanism of a new detailing, named
distributive beam, in large rectangular section concrete-filled steel tubular columns, a series of
1∶5 scaled models were tested. The vertical load was applied on the steel tube directly in the
test, so the core concrete was not directly loaded. The failure modes of specimens, the failure
modes of distributive beam, the strain distribution of steel tube and the load-bearing capacity of
specimens were analyzed. The cooperating performance of test specimens with distributive beam
detailings was evaluated at last. The test results show that the specimens exhibit good ductility
performance with an obvious yield platform before the ultimate load according to the experimental
axial load-deformation relationships. The load shouldered by the concrete decreases with the
decrease of the cross-section area of distributive beam. The failure of distributive beam occurs
at beam end, where obvious plastic deformation is shown, and tear failure of the web and the
bottom flange of distributive beam can be observed in some specimens. According to the analysis
results, the yield capacity of distributive beam is larger than the full cross-section shear
strength of the beam, while the ultimate capacity is close to the full cross-section tensile
strength of the beam.
