?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Local+and+Global+Response+Parameters+in+Seismic+Risk+Assessment+of+RC+Frames+Retrofitted+by+BRBs&rft.creator=Freddi%2C+F&rft.creator=Tubaldi%2C+E&rft.creator=Dall'Asta%2C+A&rft.creator=Ragni%2C+L&rft.description=This+paper+deals+with+the+seismic+performance+and+risk+assessment+of+existing+reinforced+concrete+(RC)+buildings%0D%0Awith+limited+ductility+retrofitted+by+means+of+buckling+restrained+braces+(BRBs).+Two+different+approaches+for%0D%0Aevaluating+the+seismic+vulnerability+and+risk+before+and+after+retrofit+are+introduced+and+analyzed.+These%0D%0Aapproaches+involve+the+use+of+different+categories+of+engineering+demand+parameters+(EDPs)+for+the+system%0D%0Aresponse+assessment%3A+global+EDPs%2C+that+permit+to+obtain+a+synthetic+description+of+the+system+behavior+at+a+reduced%0D%0Acomputational+cost%2C+and+local+EDPs%2C+more+accurate+in+describing+the+response+of+the+frame+elements+and+of+the%0D%0ABRBs%2C+though+more+demanding+from+a+computational+point+of+view.+The+effect+of+the+EDPs+choice+is+analyzed+by%0D%0Aconsidering+a+two-dimensional+RC+frame+designed+for+gravity-loads+only+as+case+study.+The+frame+is+retrofitted+by%0D%0Aintroducing+elasto-plastic+dissipative+braces+designed+for+different+levels+of+base+shear+capacity.+The+results+of+the%0D%0Astudy+show+that+the+use+of+global+EDPs+leads+to+a+significant+overestimation+of+the+retrofit+effectiveness+in+terms+of%0D%0Aboth+vulnerability+and+risk+reduction.+If+a+risk-based+design+is+carried+out+for+the+retrofit+system%2C+braces+with%0D%0Asignificantly+lower+dimensions+are+obtained+by+using+global+EDPs+instead+of+local+EDPs.&rft.subject=Reinforced+Concrete+Frames%2C+Fragility%2C+Vulnerability+Assessment%2C+Seismic+Retrofit%2C+Dissipative+Braces&rft.contributor=Modena%2C+C&rft.date=2013&rft.type=Proceedings+paper&rft.publisher=XV+National+Conference+ANIDIS%2C+L'Ingegneria+sismica+in+Italia&rft.language=eng&rft.source=+++++In%3A+Modena%2C+C%2C+(ed.)++(Proceedings)+ANIDIS+2013+-+XV+Convegno%2C+30+June+2013+%E2%80%93+4+July+2013%2C+Padova%2C+Italy.++++(2013)+++++&rft.format=text&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F1575835%2F1%2FFreddi_Local_Global_Response_Parameters.pdf&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F1575835%2F&rft.rights=open