JOINT STRUCTURE OF SQUARE STEEL PIPE COLUMN AND H-SHAPED STEEL BEAM

摘要

To provide a joint structure between a square steel pipe column and an H-shaped steel beam, in which the strength of the outer diaphragm against the tensile force in the direction outside the steel pipe column surface is not reduced and that does not hinder the soundness inspection of the beam flange-outer diaphragm welding by ultrasonic flaw detection.SOLUTION: A joining structure 1 of a square steel pipe column and an H-shaped steel beam according to the present invention joins a square steel pipe column 3 and an H-shaped steel beam 7 via an outer diaphragm 9, and the outer diaphragm 9 is formed by abutting the ends of two L-shaped steel pieces 11 having the same shape into a rectangular ring shape, and the inner peripheral surface of the rectangular ring is welded to the skin plate 5 of the square steel pipe column 3, two joint surfaces 13 between the L-shaped steel pieces 11 are located at the corners of the square steel pipe column 3, the angle formed by the extension surface of each orthogonal skin plate 5a, b, c, d of the rectangular steel pipe column 3 and the joining surface 13 is set to be 25 degrees or more and 65 degrees or less, and the joining surface 13 is joined by fillet welding, and the length of the welded portion is 10% or more of the projected dimension of the outer diaphragm 9.SELECTED DRAWING: Figure 1