| 摘要 |
PROBLEM TO BE SOLVED: To provide a column capable of sufficiently securing structural stability in a fire by coping with large axial force by using high strength concrete; and a rigid-frame structure superior in workability by using such a column. SOLUTION: This column 1 has a reinforced concrete part 10 having a vertical reinforcement (a main reinforcement) and a shearing reinforcing bar, constituted by using ordinary concrete (compressive strength of 60 N/mm<SP>2</SP>or less) 13 and forming an outer peripheral part of the column, a steel pipe 15 arranged in the axial direction inside the reinforced concrete part 10, and high strength concrete (compressive strength exceeding 60 N/mm<SP>2</SP>) 17 placed inside the steel pipe 15. The reinforced concrete part 10 and the steel pipe 15 are composed of a precast member. This invention is formed into the rigid-frame structure having the column 1 for arranging the steel pipe 15 of the column only in an inner side dimension part between beams in the vertical direction, a reinforced concrete beam 2 and a reinforced concrete column-beam joining part. COPYRIGHT: (C)2005,JPO&NCIPI
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