CFT PREFABRICATED STEEL PIPE WITH TUBE FOR THE CFT COLUMNS AND THE MAMUFACTURING METHOD THEREOF

摘要

The present invention relates to a structure of a tube column to construct a CFT column filled with concrete, and a manufacturing method thereof. The tube column includes: a rectangular steel pipe forming an outer skin of a CFT column; and a tube which has the same length as the entire column, and is arranged on at least two corners facing each other among four corners in the rectangular steel pipe. A concrete eruption hole is formed on the lowermost end in the entire length of the tube. The manufacturing method of the tube column comprises: a step of manufacturing two unit assemblies; a step of installing a vertical stiffener to form a tube on an inner corner of each unit assembly; and a step of assembling the unit assemblies with the vertical stiffeners to form a rectangular steel pipe.