Ec8-based selection and scaling of accelerograms for assessment of the response of � 5-story, irregular r/c building

Abstract eng:
This study focuses on the assessment of the selection process of real records on the basis of EC8 provisions, through the performance of nonlinear dynamic analyses of a multistorey R/C building, which was damaged during the Lefkada earthquake in 2003. The building was modelled and studied in the elastic and inelastic range with alternative finite element programs (i.e., Zeus-NL, ETABS and ANSYS) by considering R/C member nonlinearity and the presence of soil. The seismic response of the building is quantified through a displacement-based damage index, denoted as DCR (demand-to-capacity ratio). Five different sets of seven pairs of horizontal components of strong ground motion are selected from available databases from Europe, the Middle-East and the U.S., in compliance with corresponding EC8 (Part 1 and Part 2) guidelines. The results of the extensive parametric analyses performed permit quantification of intra - bin scatter of the building damage and also highlight the limitations of Eurocode 8 provisions. The paper concludes with specific recommendations that aim at eliminating the dispersion of the inelastic response results though appropriate modifications of the EC8-proposed selection parameters.

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