崩壊変形を含む鉄筋コンクリート柱の荷重低下域における挙動の定式化

抄録

RC buildings designed by the old codes are in danger of suffering heavy damages or even collapse during coming severe earthquakes. To evaluate seismic performance of those buildings accurately, it is necessary to grasp post-peak behavior of old columns. Twenty six half-scale model specimens that failed in shear before flexural yielding or yielded before shear failure were tested until they came to be unable to sustain constant axial load. Using results of the tests, it was attempted to formulate the post-peak behavior of old columns including collapse drift.