This study aims at evaluating, by means of a probabilistic approach, the effectiveness of dissipative braces based on elasto-plastic devices in reducing the vulnerability of existing reinforced concrete buildings designed before the introduction of modern anti-seismic codes. A benchmark 2-dimensional reinforced concrete frame whit low ductility capacity is considered as case study. The dissipative braces are designed for different levels of the target shear capacity assigned to the bracing system, following a design method involving the pushover analysis of the bare frame. The probabilistic seismic response and vulnerability of the structure are investigated by building fragility curves of the system and of its most vulnerable components.
Probabilistic performance assessment of low ductility r.c. frames retrofitted by elasto-plastic dissipative braces
DALL'ASTA, Andrea
2010-01-01
Abstract
This study aims at evaluating, by means of a probabilistic approach, the effectiveness of dissipative braces based on elasto-plastic devices in reducing the vulnerability of existing reinforced concrete buildings designed before the introduction of modern anti-seismic codes. A benchmark 2-dimensional reinforced concrete frame whit low ductility capacity is considered as case study. The dissipative braces are designed for different levels of the target shear capacity assigned to the bracing system, following a design method involving the pushover analysis of the bare frame. The probabilistic seismic response and vulnerability of the structure are investigated by building fragility curves of the system and of its most vulnerable components.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
