STEEL PIPE COLUMN WITH BOX SECTION

摘要

PURPOSE: To ensure the shear strength of the column against horizontal force even if a beam is eccentrically joined to the column, by a method wherein the thickness of all or part of a covering plate is made thicker than that of a steel material with a U-shaped cross section. ;CONSTITUTION: A steel pipe column 10 with a box section is composed of a steel material 1 having a U-shaped cross section and a covering plate 2 joined thereto, and the covering plate 2 is 1.3 to 1.7 times as thick as the steel material 1. When horizontal force is applied to a building construction by an earthquake, a strong wind or the like, the horizontal force is transmitted to the column 10 through a beam 3 joined thereto, and acts to the column 10 joining the beam 3 as shearing force. In the column 10, this shearing force is distributed to two sides 11, 12 parallel to the beam 3 and distributed force acts separately to the two sides 11, 12 as shearing force. If the axis of the beam 3 is matched to that of the column 10, the shearing force is equally distributed to the two sides 11, 12. If the axis of the beam 3 is eccentrically joined to that of the column 10, a value of shearing force acting on the side 11 nearer to the beam 3 is increased compared with the case where the shearing force is equally distributed, and the strength of the column 10 is designed in proportion to the value of the shearing force increased.;COPYRIGHT: (C)1996,JPO