Abstract：Four specimens of steel eave columns with Dougong in 1/1.5 scale were
tested under low-cyclic reversed loading in order to investigate the effect of the
slenderness ratio and the axial compression ratio of square steel tubular columns
on the seismic performance of the joints. The hysteretic characteristics,
degradations of rigidity and strength, ductility and dissipation capacity of the
specimens were obtained. The failure modes and strain distribution in connection
area were analyzed. The results indicate that the failures of eave columns with
Dougong are mainly caused by weld fracture of Ludou and by the weld fracture at the
connection between the two-side bottom flanges of the square steel tubular columns
and the web, tension fracture of base material in the heat-affected zone of the
columns. The hysteretic loops of the columns are plump. As the columns failed, both
the ductility factor of the story drift and the equivalent viscous damping
coefficient were large in magnitude, indicating that the columns have good
deformation capacity and energy-dissipation capacity. The finite element program
ABAQUS was used to generate 3D model in which the axial compression ratio and
slenderness ratios were considered as analytical parameters. The experiment and
numerical simulation results show that with the increase of axial compression
ratio, the elastic rigidities of the specimens change insignificantly, whereas the
ductility of the specimens may decrease to some extent. With the increase of
slenderness ratio, the ductility of the specimens may increase, whereas their
horizontal load-bearing capacities may decrease.
