This technology is a building system for square steel pipe columns equipped with beam support brackets and through-pipes. It involves placing H-beam sections with concrete-filled end casings at both ends onto the brackets, then tensioning and anchoring a fastening device through the pipes to create a rigid connection. The end casing consists of an outer end plate, an inner end plate, side plates, and inclined plates.
Among diaphragms connecting concrete-filled square steel pipe columns and H-beams, internal diaphragms are difficult to fabricate due to the need for welding inside the pipe. Through-diaphragms often create voids inside the pipe, reducing the reliability of concrete filling. While external diaphragms offer better filling reliability, they also require inefficient on-site welding, making quality control difficult. Additionally, using H-beams with the same cross-section throughout their entire length is inefficient.
This technology allows the inclined plates of end casings on beams attached to two orthogonal sides of a column to make surface contact, enabling the casings surrounding the column to act as an external diaphragm without welding. For square columns, the outer end plate and inclined plate form a 135° angle, and adjacent casings are joined with coupling members. Construction involves placing the beam on the bracket, anchoring the steel rods, pouring concrete into the column and casing, and then installing the steel deck and floor slab. Applicable to CFT column frames for high-rise offices, mixed-use complexes, data centers, and large retail facilities, it reduces the need for on-site weld inspections, ensures internal column filling quality, and saves steel by reinforcing only the beam ends.
This invention was developed with support from the Ministry of Science and ICT's AI-based Smart Mega-Structure Laboratory.
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