SEISMIC STRENGTHENING STRUCTURE AND SEISMIC STRENGTHENING METHOD

PROBLEM TO BE SOLVED: To provide a seismic strengthening structure and a seismic strengthening method in which a strengthening member is fixed to a structure formed with a steel tube, without using welding.SOLUTION: An seismic strengthening structure 10 comprises: a structure 11 formed with a steel tube; a cotter 2 fitted to an outer surface of the structure 11; an enclosing member 3 formed in a cylindrical shape and arranged so as to enclose the structure 11 on the outside of the cotter 2; a shear reinforcement 5 provided along an inner surface of the enclosing member 3 and generating compressive force between the cotter 2 and itself; an extension part 31T extending to the outside from the enclosing member 3; a filling part 6 filled between the structure 11 and the enclosing member 3 and integrated with the structure 11 via the cotter 2;and a strengthening member 7 fixed by a bolt 72X to the extension part 31T.SELECTED DRAWING: Figure 3 【課題】鋼管で形成される構造体に溶接を用いないで、補強部材を固定する耐震補強構造及び耐震補強方法を提供する。【解決手段】耐震補強構造１０は、鋼管で形成された構造体１１と、構造体１１の外面に取り付けられたコッター２と、筒状に形成され、コッター２の外側に構造体１１を囲うように配置された囲い部材３と、囲い部材３の内面に沿って設けられ、コッター２との間で圧縮力を生じさせるシアー鉄筋５と、囲い部材３から外側に延出する延出部３１Ｔと、構造体１１と囲い部材３との間に充填され、コッター２を介して構造体１１と一体化された充填部６と、延出部３１Ｔにボルト７２Ｘで固定された補強部材７と、を備えることを特徴とする。【選択図】図３