Description
In this paper, the seismic response of a 5 story reinforced concrete (RC) frame system building is analysed through the fragility analysis. The construction is designed in accordance with structural Eurocodes: EN1990; EN1991; EN1992; EN1998, as a ductility class high (DCH) system. For the analysis of the response of structural system to the earthquake actions, the methods of nonlinear static (NSA) and nonlinear dynamic analyses (NDA) were applied and, based on the obtained results, fragility curves were constructed using statistical methods. Fragility curves are functions of intensity measure (IM) and engineering demand parameter (EDP). Fragility functions represent a possibility for different states of damage to occur in certain structural system, at observed value of specified IM. Pushover analysis was performed as a part of NSA and time history (TH) procedure was used as a part of incremental NDA. Ten accelerograms, used in NDA, are selected and scaled according to EN1998 provisions, for the chosen elastic response spectrum and referent PGA. Obtained results were used for the statistical analysis and construction of fragility curves. Structural damage state threshold parameters are determined based on the methodologies described by Park and Ang and in FEMA, HAZUS and EN codes. Comparative analysis of the structural damage probability for the analysed RC building, calculated using different methodologies to determine damage states, is applied. Based on the analysis results, final remarks and conclusions were formulated.
| DOI | https://doi.org/10.5592/CO/1CroCEE.2021.136 |
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| Keywords | RC building, seismic actions, nonlinear analyses, damage, fragility, FEMA, Eurocode |
