INFLUENCE OF GROUND MOTION PARAMETERS ON SEISMIC RESPONSE

To establish a connection with structural vulnerability, ground motions generate intricate datasets distinguished by various properties. The objective of the investigation is to evaluate the impact of specific seismic record properties on the nonlinear structural response of buildings, with the ultimate goal of determining the characteristics that have the most significant effect on structural vulnerability. An experimental model, the ICONS, was employed to calibrate a numerical nonlinear model for the study. This model depicts existing buildings that were constructed without regard for seismic regulations. These buildings are prevalent in cities such as Zagreb and Dubrovnik, located in highly seismically precarious regions of Croatia. The analysis comprised 30 seismic records that were selected based on parameters such as peak ground acceleration (PGA), magnitude (M), and distance from the epicentre (R), following the disaggregation and uniform hazard spectrum results. Storey displacement data was generated from the records through dynamic time-history analysis, which allowed for calculating maximum inter storey drift ratios (IDR) as a metric for structural damage. A substantial correlation between structural damage and seismic record characteristics was discovered during the analysis. Peak ground velocity (PGV), specific energy density (SED), and Housner intensity (HI) were identified as the most significant factors influencing structural vulnerability. Consequently, they should be prioritised when selecting seismic records for structural damage assessments.