大地震後の応急的な補修を行った有開口 RC造袖壁付き柱の再加力実験

摘要

Authors had conducted experimental studies to examine the effects of opening on flexural strength and ultimate deformation using three reinforced concrete column specimens with a holed, sidewall failing in flexure. In this study two of them were repaired and reloaded in order to examine the effects of emergency repair on performance recovery such as initial stiffness, flexural strength and deformation capacity. Two specimens were repaired by recasting of mortal concrete to the damaged region due to compressive failure of concrete. The opening of one of them was infilled with mortal concrete as well. The third specimen with the same repairing method was retested as a non opened specimen for reference by setting up the specimen upside down to the loading setup. Repaired specimens showed the same performance as original specimens as for flexural strength and deformation capacity except for initial stiffness.%(1)最大耐カに関しては，袖壁圧壊部分の補修により，袖壁が圧 縮を受ける補修前の試験体とほぼ同様の耐カを示す結果となった。また，開口の閉塞を行ったものは補修前ならびに圧壊部分の補修の みを行ったものを大きく上回る結果となった。しかし，補修を行つ ていない負方向は，耐力の改善は見られなかった。また，無開口を 想定したものは開口を閉塞したものを除き，補修前のものと圧壊部 分のみ補修を行ったものと比べ，若干大きい結果であった。。