Deux approches differentes dans l'evaluation analytique du potentiel endommageant des tremblements de terre: application et validation pour les forts seismes de Vrancea, Roumanie

TL;DR

This study compares two analytical methods for assessing earthquake damage potential using data from Vrancea, Romania, validating their effectiveness against observed building damages during significant seismic events.

Contribution

It introduces a comparative analysis of the Park-Ang damage index and instrumental seismic intensity for seismic damage assessment.

Findings

Both methods provide consistent damage potential estimates.

Spatial damage maps correlate with observed building damages.

The approaches are validated for strong Vrancea earthquakes.

Abstract

The paper presents a comparison between the results of the analytical assessments of the damage potential of seismic ground motions, based on two different parameters: the Park-Ang damage index and the Sandi instrumental seismic intensity. The Park Ang damage index is largely used for structural damage assessment due to its simplicity and its calibration against experimental data. The instrumental intensity has the advantage of being calibrated with respect to the EMS 98 intensity scale. Based on the processing of ground motions recorded during the strong earthquakes generated by the Vrancea seismic source in 1977 (moment magnitude Mw=7,4) and 1986 (Mw=7,1), the values of the considered parameters are determined and maps of their spatial distribution are generated. The results of the two approaches are compared to one another, as well as with the information provided by the reports concerning the effective damage observed in buildings due to the considered earthquakes.