Urban scale risk assessment including SSI and site amplification

Abstract Large-scale risk analysis is typically performed considering existing fragility curves, calculated in most cases without adequately accounting for local site amplification (SAmp) and soil-structure interaction (SSI) effects. Nevertheless, foundation flexibility effects may lead to a substantial difference the or loss estimates. Including these on city-scale vulnerability challenging due complexity of defining whole interacting urban system. We propose novel framework assessment structures influence SSI effects, suitable large-scale applications. The applicability proposed approach based globally available data regarding soil, foundation, building portfolio. Site considered directly resulting curves using response analyses. An improved taxonomy adopted make implementable OpenQuake software, introducing V S,30 H/B within structural features as proxies Finally, following performance-based earthquake engineering framework, outcomes methodological are estimate nominal probability failure selected classes belonging majority types city Thessaloniki, Northern Greece. main findings demonstrate that conventional way calculating different seismic evaluation, especially soft soil formations.