Abstract：To study the hysteretic behavior of L-shaped steel reinforced concrete (SRC) column-
concrete beam joints, four planar joint specimens and seven 3D joint specimens were tested under
the quasi-static state, and the varying parameters included steel form for cross section of
column, axial compression ratio, horizontal loading angle and participation of floor slab. The
failure mode, hysteresis curve, bearing capacity, stiffness degradation, energy dissipation
capacity, displacement ductility and storey drift angle were compared and analyzed for those
specimens. The test results show that for planar joints, the main failure mode is the shear
failure, while for 3D joints, their failures are attributed to the plastic hinge appeared in the
beam end. For RC 3D joints with floor slab participated, the main failure modes shall be the
flexural failure of floor slab and the plastic hinge appeared at the bottom of beam. The
hysteresis curves of specimens with solid-web steel shall be more plump than those of specimens
with hollow-web steel. The bearing capacity of planar joints is larger than that of 3D joints, but
their energy dissipation capacity, displacement ductility and collapse resistance shall be
inferior to those of 3D joints. The existence of floor slab shall be beneficial to the enhancement
of bearing capacity and the stability of stiffness for the joints. A large axial compression ratio
can increase the bearing capacity and the initial stiffness of specimens. The storey deformation
capacity of L-shaped column frame joints is larger than the storey drift angle limit specified by
code. By introducing the loading angle, the calculation model of shear capacity is proposed for
L-shaped SRC column-beam 3D joints, and the model can reflect the forcing mechanism of shear
failure in the core of joint.
