earticle

영어

In this study, it is expected that the application of head which is used for mechanical anchor instead of standard hook applied to later tie solves workability matters and the increased effective confinement area by head conclusively confines core concrete effectively, which contributes to the increase in strength and ductility of column. Thus, by the experiment on seven 300x300 mm reinforced concrete columns subjected to uniaxial compression, the effect on the strength and ductility of the columns mediated by head was assessed. In addition, to estimate increased strength increase coefficient, lateral confinement model based on Sheikn and Uzumeri's model was suggested. As a result, ductility of specimen applied head was shown to be higher when the space between lateral ties is wider, and it is considered that the suggested model could be applied for predicting the increased strength enhancement coefficient of column by head.