@inproceedings{discovery1575831,
           month = {September},
         address = {Bari, Italy},
            note = {This version is the version of record. For information on re-use, please refer to the publisher's terms and conditions.},
       publisher = {ANIDIS},
       booktitle = {Proceedings of the XIV National Conference ANIDIS},
            year = {2011},
           title = {Probabilistic performance assessment of low ductility r.c. frames retrofitted by elasto-plastic braces},
          author = {Ragni, L and Freddi, F and Tubaldi, E and Dall'Asta, A},
        abstract = {The paper illustrates a probabilistic methodology for assessing the vulnerability of existing r.c. buildings with
limited ductility capacity and retrofitted by means of dissipative braces. The methodology is based on the
development of single component and system fragility curves before and after the retrofit. The proposed approach
allows to highlight the possible changes in the most significant collapse modalities before and after the retrofit and
to evaluate the effectiveness of the retrofit by taking into account the probabilistic properties of the seismic
behaviour of the considered systems.
A benchmark 2-dimensional reinforced concrete frame with low ductility capacity is considered as case study. The
frame is designed for gravity-loads only and does not comply with modern anti-seismic code requirements. It is
retrofitted by introducing elasto-plastic dissipative braces designed for different levels of their target base-shear
capacity, following a design method involving the pushover analysis of the system before and after retrofit. The
obtained results show that the use of braces yields a significant increase in the seismic capacity, though an
increased dispersion of the behaviour is observed in the retrofitted system.},
             url = {http://convegno.anidis.it/index.php/anidis/2011/index},
        keywords = {Vulnerability of low ductility r.c. frames, seismic retrofit, fragility curves, elasto-plastic devices.}
}