Comparetively Evaluation of Performance Levels at Building Earthquake Code of Turkey for Columns

In the study, the performance levels based on the plastic rotation angle in the 2018 Building Earthquake Code of Turkey (BECT) were evaluated in comparison with the ASCE/SEI 41-17 column damage limits based on the probability of exceedance concept. For this purpose, numerical comparisions were carried out for the characteristic plastic rotation angles of 4725 column samples in terms of cross-section size, axial force level, shear force level confinement ratio, longitudinal reinforcement ratio and concrete strength. Cross-section size, axial load ratio and confinement ratio were the parameters that caused significant differences between the BECT and the ASCE approaches. The performance levels obtained from the BECT fulfilled the probabilistic risk levels stipulated in the ASCE for the majority of the investigated elements. However, it has been determined that the risk limits in the ASCE can be exceeded especially for the elements non-compliant with the BECT-2018 and extremely safe results can be obtained for certain elements.