Composite frame having end-embedded girder joint structure

A composite frame having an end-embedded girder joint structure, comprising:

• a plurality of pre-assembled column assemblies (1), each including a plurality of first main steel section members (11) disposed in a vertical direction at each corner of a column member, and first connecting bars (12) coupled to outer surfaces of the first main steel section members (11) so as to interconnect the first main steel section members (11) neighboring each other;
• pre-assembled bracket assemblies (2) disposed in a transverse direction on upper ends of the pre-assembled column assemblies (1), having open upper surface portions, and including four second main steel section members (21) provided in a horizontal direction at left and right sides of the pre-assembled column assemblies (1) at positions spaced apart from each other vertically and protruding to the outside of the pre-assembled column assemblies (1), and second connecting bars (22) for interconnecting the second main steel section members (21) neighboring each other vertically and interconnecting the second main steel section members (21) neighboring each other on the left and right at lower portions;
• a girder body (3) installed between the pre-assembled bracket assemblies (2) coupled to the neighboring pre-assembled column assemblies (1), both end portions of the girder body (3) being inserted into the pre-assembled bracket assemblies (2) so as to overlap the second main steel section members (21) by a predetermined length and be mounted in the pre-assembled bracket assemblies (2);
• and
• concrete poured inside the pre assembled bracket assemblies (2) so as to cover an outside of the girder body (3) and structurally integrate the girder body (3) with the pre-assembled bracket assemblies (2).