A study of the dynamic seismic performance index of building in Indonesia

Recent earthquakes have exposed the vulnerability of buildings in Indonesia. An evaluation is needed to confirm the seismic performance of the structures. A seismic index is a method to determine building performance. This research aims to evaluate the performance using a dynamic seismic performance index dIs by considering Indonesia’s seismic hazard. The nonlinear incremental dynamic analysis with a bilinear hysteretic model was used in the analysis. The estimation method using the equivalent linearization and using the characteristic displacement response is proposed to estimate a dynamic ductility index dF. The dynamic seismic performance index tends to increase with an increase in the critical ductility factor. The dynamic ductility index dF represents a modification factor (R) that also increases with an increase in the critical ductility. The accuracy of the equivalent linearization is more accurate in the lower period, but the characteristic displacement method gives the closest estimate in the higher period