SIMPLIFIED DISPLACEMENT-BASED ECONOMIC LOSS ASSESSMENT OF SINGLE-STOREY STEEL BUILDINGS

Considering non-residential single-storey old steel buildings, the paper describes a comparison between different structural models and analysis methods for earthquake-induced economic loss assessment. First, the paper describes a simplified approach, which uses finiteelement models of 2D frames extracted from the actual 3D building structure in conjunction with a displacement-based loss assessment (DBLA) procedure. Second, based on a much more complex 3D non-linear finite element model of the entire building with envelope panels, the economic loss assessment is carried out using a free software available in the literature and named PACT. The software PACT is an implementation of the performance-based earthquake engineering methodology (PBEE), using Monte-Carlo simulations and results from multiple nonlinear dynamic analyses at increasing intensity of ground motions. Comparing the results from the two approaches allows to trace some conclusions about potentialities and limitations of the simplified modelling and analysis method.