A rapid seismic fragility and risk analysis of electrical substation equipment considering modeling uncertainties

•Modeling uncertainties are incorporated into the failure fragility curves of substation equipment interconnected by rigid bus conductors.•Sensitivity analysis is carried out to identify the influential modeling parameters on the seismic response.•An efficient method based on the ET method is proposed to estimate response distributions and fragility parameters of the connected apparatuses.•A multi-hazard risk analysis is performed by presenting a rapid seismic risk framework based on the scenario sampling analysis and ET method.