Seismic fragility functions were derived using a probabilistic-based methodology, which may be used for global damageability assessment of the considered frame building typology. The frames were analyzed through incremental dynamic analyses. Numerical frame models were prepared in finite element-based program SeismoStruct and calibrated against experimental tests. A uniform damage scale was developed for global performance assessment of considered deficient RC frames, listing average estimate of limit states’ drifts and base shear coefficients, with measured uncertainty, and describing frame damage condition. The models’ damage mechanisms were studied, and the seismic response in terms of floor acceleration and floor displacement was retrieved.
The models were subjected to the natural accelerogram of the 1994 Northridge earthquake and tested under multiple scaled excitations until the models attained incipient collapse state. Shake table tests were performed on three two-story 1 : 3 reduced scale RC frame structures, representative of buildings with construction deficiencies in Pakistan.
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