نوع مقاله : علمی - پژوهشی
عنوان مقاله English
نویسندگان English
This study investigates the application of a cumulative damage criterion (Y criterion), which accounts for diverse structural component damage mechanisms, within a probabilistic performance-based seismic assessment framework. Its predictive capability is compared with the conventional maximum interstory drift ratio (MIDR) criterion. Failure probability and the probability of exceeding the collapse-prevention performance limit state were evaluated for a representative class of existing low-rise reinforced concrete (RC) buildings in Iran using nonlinear incremental dynamic analysis of a five-story intermediate-ductility RC frame. The structural model was developed using a nonlinear fiber model. The results show that the proposed Y criterion reduced the dispersion of damage data by 50% to 80% compared with the MIDR criterion, leading to an approximately 5% reduction in the estimated conditional probability of collapse at the Maximum Considered Earthquake hazard level. Furthermore, the identified collapse mechanisms indicate that the undesirable weak-column/strong-beam mechanism did not develop under nearly 75% of the ground motions. Overall, the findings highlight the potential of the proposed Y criterion as a reliable damage measure for refining performance-based seismic design and rehabilitation strategies, while improving the accuracy of seismic risk assessment for existing reinforced concrete buildings subjected to seismic hazard levels beyond the Design Basis Earthquake.
کلیدواژهها English
