In rim of the cylinder component of earthquake-proof additional strength mannered null existing RC structure or cage of the cylinder component which uses

摘要

PROBLEM TO BE SOLVED: To provide a column member, having high earthquake resistance brought by high deformation performance and stable secondary rigidity, and having excellent workability and economical efficiency, a UFC-made precast form and an earthquake resisting reinforcement method for a column member using the UFC-made precast.;SOLUTION: Concrete of a cover part in a plastic hinge section L of a column having RC structure is chipped to expose a main reinforcement 1b and a hoop 1c. The UFC-made precast form 2 is installed in the outer periphery thereof. A void part 3 between the precast form 2 and the column 1 is filled with ordinary concrete 4. The UFC-made precast form 2 is constructed in the axial direction and in the circumferential direction by a plurality of parts. Horizontal joint parts 8a, 8b functioning as crack guide joints are provided in the circumferential direction and in the axial direction of the column 1 in the UFC-made precast form 2. The respective parts of the UFC-made precast form 2 are formed of ultra-high strength fiber reinforced concrete.;COPYRIGHT: (C)2008,JPO&INPIT