?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Surrogate+modeling+for+seismic+fragility+prediction+of+masonry+infilled+RC+frames&rft.creator=Chelapramkandy%2C+Rifan&rft.creator=Ghosh%2C+Jayadipta&rft.creator=Freddi%2C+Fabio&rft.description=Reinforced+concrete+(RC)+frames+with+masonry+infills+have+continued+to+remain+a+popular+construction+typology+across+the+globe%2C+including+regions+characterized+by+moderate+to+high+seismic+activity.+Owing+to+the+brittle+nature+of+the+masonry+infills%2C+their+influence+on+the+seismic+analysis+and+design+of+framed+structures+has+been+typically+neglected.+However%2C+scientific+literature+and+field+reconnaissance+surveys+indicate+that+the+strength%2C+stiffness%2C+and+distribution+of+masonry+infills+within+RC+frames+can+significantly+influence+their+seismic+performance.+Typical+finite+element+modeling+of+masonry+infills+within+RC+frames+for+nonlinear+time+history+analysis+comprises+of+single+or+multiple+struts+modeling+approaches+that+require+detailed+information+on+the+characteristic+back-bone+curve+of+the+masonry+infill.+However%2C+past+studies+report+considerable+variability+associated+with+the+material+parameters+of+masonry+infills+(such+as+strength+and+elasticity)+that+may+affect+the+seismic+response+and+fragility+of+RC+framed+structures.+This+paper+proposes+a+novel+framework+that+develops+parameterized+seismic+fragility+functions+for+infilled+RC+frames+conditioned+on+critical+infill+material+parameters+in+addition+to+ground+motion+intensity.+Unlike+typical+unidimensional+fragility+functions%2C+the+parameterized+multidimensional+fragility+models+offer+flexibility+to+efficiently+asses+the+influence+of+infill+material+parameters+on+seismic+vulnerability.+Such+models+are+developed+in+the+present+study+through+a+systematic+approach+rooted+in+statistical+learning+techniques.+Initially%2C+an+experimental+design+is+devised+that+considers+an+optimal+combination+of+infill+material+parameters+for+computer+simulations.+Next%2C+the+seismic+response+from+these+simulations+is+obtained+to+develop+surrogate+models+that+predict+engineering+demand+parameters+(e.g.%2C+interstory+drifts)+as+a+function+of+infill+material+parameters+and+ground+motion+intensity.+Lastly%2C+the+seismic+demands+obtained+from+the+surrogate+models+are+compared+with+seismic+capacity+estimates+to+generate+the+parameterized+seismic+fragility+functions.+The+proposed+methodology+is+applied+to+a+case-study+low-ductility+RC+frame+with+masonry+infills+to+underline+the+gain+in+computational+efficiency+and+accuracy+for+seismic+response+and+vulnerability+prediction.&rft.publisher=World+Conference+on+Earthquake+Engineering+(WCEE)&rft.date=2024-07-05&rft.type=Proceedings+paper&rft.language=eng&rft.source=+++++In%3A++Proceedings+of+the+18th+World+Conference+on+Earthquake+Engineering+(WCEE+2024).++++World+Conference+on+Earthquake+Engineering+(WCEE)%3A+Milan%2C+Italy.+(2024)+++++&rft.format=text&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F10195515%2F1%2FChelapramkandy%2520et%2520al%2520-%2520WCEE2024%2520-%2520Masonry%2520Infills.pdf&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F10195515%2F&rft.rights=open