Abstract: A modular horizontal channel steel beam connection device is disclosed, pertaining to the technical field of prefabricated building structures. The device comprises an I-shaped stiffener, and a vertical force reinforcement module mounted in a mounting groove, wherein top four corners of the I-shaped stiffener are provided with threaded holes corresponding to the vertical force reinforcement module and the top of the vertical force reinforcement module is fixed in the reinforcement module mounting groove by fixing bolts. By adopting a modular horizontal channel steel beam connection configuration, the disclosed beam connection device can solve the problems of low construction efficiency, stress concentration at the joints and poor modular adaptability caused by insufficient standardization of connection interfaces, and by discontinuous force transmission paths in existing connection devices, thereby enhancing structural integrity and seismic performance of prefabricated steel beams.

Abstract: A boltless connection device for upper and lower modular beams of a steel structure modular building is disclosed, comprising a geared reinforcement structure; the modular beam reinforcement structure is a monolithic C-shaped channel structure; large gears are arranged oppositely on an inner side surface of the modular beam reinforcement structure; pinion gears and bolts are arranged at upper and lower relative positions of the modular beam reinforcement structure, and form a gear transmission fit with the large gears; a push-pull sliding plate is slidably connected via a sliding groove, and a gear sliding plate forms a gear transmission fit with the large gear. The connection device of the modular beam structure forms a tight mechanical interlock, which replaces the conventional single-point stress mode of bolts and welding, and can effectively resist the combined effect of bending moment, shear force and axial force.