This study investigates the cyclic behavior of flange plate connections between steel beam and rectangular CFT column, in which the flange plates were penetrated through the CFT column. The steel tube of flange plate connections tore at the tips of the weld joining the flange plate to the steel tube. Specimens with adequate shear capacity in the panel zone formed the plastic hinge in the beam, while specimens with weak panel zone demonstrated the shear cracking in the concrete core, and fracturing of the steel tube. The specimen with connection of whole beam through the column possessed stable hysteresis curve.
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