Abstract
Behavior of concrete confined by lateral reinforcement is addressed through experimental approach. The primary objectives of the experimental study are to mechanically define the confinement effectiveness of lateral reinforcement layouts and to obtain reliable data for verification of non-linear, three dimensional concrete constitutive law under non-uniform stress field produced in confined concrete cores of column members. Further, identification of the influence of detailing parameters on the confinement phenomena was aimed for the purpose of developing and examining a behavior oriented macro-model.