Fragility Functions for Reinforced Concrete Structures Based on Multiscale Approach for Earthquake Damage Criteria

For seismic risk analysis, reliable predictions and estimations of earthquake damage behaviour buildings are essential. A common method is the use fragility curves. In this paper, functions developed based on various numerical criteria for five defined grades, from slight to destruction. The proposed new multiscale approach establishes a correlation between observed patterns due foreign earthquakes response building using thresholds material-specific global characteristics. This takes into account possible different scales more comprehensively than well-known displacement criteria. Moreover, universal adaptable classes as well region-specific material system Several with their limit values assigned whereby quantity distribution exceeded relevant, since first occurrence does not always lead damage. With approach, damages that evident in pushover curve terms strength degradation can be detected taken thresholds. derived associated levels basis developing functions. results—damage criteria, curves capacity parameters—are presented four-storey reinforced concrete frame building. These results discussed validated data literature. Comparisons existing literature show our mostly located middle range, graphically parameters. specific example was chosen present but general classes, numerous simulations varying characteristics essential result higher standard deviation final