An earthquake scenario for the microzonation of Sofia and the vulnerability of structures designed by use of the Eurocodes |
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| Authors: | Paskaleva Ivanka Dimova Silvia GF Panza Giuliano Vaccari Franco |
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| Institution: | aCentral Laboratory Seismic Mechanics and Earthquake Engineering (CLSMEE) Bulgarian Academy of Sciences (BAS), Acad. G. Bonchev block 3, 1113 Sofia, Bulgaria;bEuropean Laboratory for Structural Assessment (ELSA), I-21020 Ispra (VA), Italy;cDST-University of Trieste, via E. Weiss 4, 34127 Trieste, Italy;dThe Abdus Salam ICTP, SAND Group, Strada Costiera 11, 34100 Trieste, Italy;eUniversity of Trieste, via E. Weiss 4, 34127 Trieste, Italy |
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| Abstract: | The study of the site effects and the microzonation of a part of the metropolitan Sofia, based on the modelling of seismic ground motion along three cross-sections are performed. Realistic synthetic strong motion waveforms are computed for scenario earthquakes (M=7) applying a hybrid modelling method, based on the modal summation technique and finite differences scheme. The synthesized ground motion time histories are source and site specific. The site amplification is determined in terms of response spectra ratio (RSR). A suite of time histories and quantities of earthquake engineering interest are provided. The results of this study constitute a “database” that describes the ground shaking of the urban area. A case study of experiment-based assessment of vulnerability of a cast-in-situ single storey, industrial, reinforced concrete frame, designed according to Eurocodes 2 and 8 is presented. The main characteristics of damage index and storey drift are discussed for the purposes of microzonation. |
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| Keywords: | Seismic hazard Ground motion modelling Hybrid approach Vulnerability Damage estimations |
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