STEEL PIPE COLUMN STRUCTURE AND METHOD FOR PRODUCING SAME

摘要

An object of the invention is to provide a steel-pipe column structure achieving an efficient design and a method of manufacturing the structure. Another object of the invention is to provide a steel-pipe column structure that dispenses with reinforcement such as welding while having an opening portion in a portion around the base portion and a method of manufacturing the structure. A steel-pipe column structure 1 according to the invention includes a first circular steel pipe 1a to an eighteenth circular steel pipe 1r. The steel-pipe column structure 1 is characterized in that the sheet thickness of a circular steel pipe in a range extending at least partially in the height direction varies in the peripheral direction when viewed in a cross section taken perpendicularly to a direction of an axis of the steel-pipe column structure.