?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Assessment+of+seismic-induced+pounding+risk+based+on+probabilistic+demand+models&rft.creator=Tubaldi%2C+E&rft.creator=Freddi%2C+F&rft.creator=Barbato%2C+M&rft.description=The+seismic-induced+pounding+between+adjacent+buildings+is+an+undesirable+event+that+can+cause+major+damage+and+even%0D%0Astructural+collapse+for+structures+with+inadequate+separation+distance.+This+issue+is+particularly+important+in+metropolitan%0D%0Aareas%2C+where+the+land+space+is+limited+and+expensive.%0D%0AIn+order+to+minimize+the+pounding+risk%2C+existing+design+codes+provide+simplified+numerical+procedures+and+analytical+rules%0D%0Afor+estimating+the+minimum+separation+distance+that+is+needed+to+avoid+pounding+under+a+target+seismic+hazard+scenario.%0D%0AHowever%2C+these+code+procedures+are+characterized+by+unknown+safety+levels+and%2C+thus%2C+do+not+permit+to+control+explicitly+the%0D%0Arisk+of+pounding+or+the+consequences+of+the+impact.+Previous+research+by+two+of+the+authors+developed+a+reliability-based%0D%0Adesign+methodology+for+the+separation+distance+that+corresponds+to+a+target+probability+of+pounding+during+the+design+life+of%0D%0Aadjacent+buildings.+This+methodology+was+successfully+applied+to+linear+elastic+structures.%0D%0AFurther+studies+are+required+to+make+reliability-based+methodologies+applicable+in+an+efficient+way+to+more+complex%0D%0Anonlinear+building+models%2C+which+require+the+use+of+computationally+expensive+numerical+simulations+to+accurately+predict%0D%0Athe+structural+response.+This+paper+illustrates+an+efficient+probabilistic+seismic+demand+model+(PSDM)+for+pounding+risk%0D%0Aassessment+consistent+with+modern+performance-based+design+frameworks.+A+PSDM+consists+in+the+analytical%0D%0Arepresentation+of+the+relation+between+a+seismic+intensity+measure+(IM)+and+an+engineering+demand+parameter+(EDP).+In+this%0D%0Aspecific+problem%2C+the+EDP+of+interest+is+the+peak+relative+displacement+between+the+adjacent+buildings+at+the+most+likely%0D%0Aimpact+location.+The+PSDM+can+be+used+to+estimate+the+seismic+vulnerability+and+the+mean+annual+frequency+of+pounding%0D%0Abetween+adjacent+buildings+via+convolution+with+the+site%E2%80%99s+hazard+curve.%0D%0AFirst%2C+an+extensive+parametric+study+is+performed+by+considering+the+case+of+two+adjacent+buildings+modeled+as+linear+singledegree-of-freedom%0D%0A(SDOF)+systems.+Different+IMs+are+proposed+for+the+problem+at+hand%2C+whose+choice+is+motivated+mainly%0D%0Aby+efficiency+criteria.+The+parametric+study+results+are+utilized+to+evaluate+the+efficiency+and+sufficiency+of+the+proposed%0D%0AIMs+employed+in+conjunction+with+a+PSDM+based+on+the+linear+regression+of+the+seismic+demand+variation+with+respect+to%0D%0Athe+IM+in+the+log-log+space.%0D%0ASuccessively%2C+the+case+study+of+two+realistic+steel+buildings+modeled+as+nonlinear+hysteretic+multi-degree-of-freedom+sheartype%0D%0Asystems+is+considered+to+evaluate+the+effectiveness+and+accuracy+of+the+IMs+and+PSDM+introduced+for+the+buildings%0D%0Adescribed+as+SDOF+systems.+A+bilinear+PSDM+is+proposed+to+achieve+a+better+fit+of+the+seismic+median+demand+and%0D%0Adispersion+over+the+entire+range+of+seismic+excitation+levels.+Finally%2C+comparisons+are+made+between+the+risk+estimates%0D%0Aobtained+by+using+the+linear+and+bilinear+PSDMs+and+the+corresponding+estimates+obtained+via+incremental+dynamic%0D%0Aanalysis+(IDA)+in+order+to+evaluate+and+compare+the+accuracy+of+the+proposed+regression+models.+It+is+found+that+the+use+of+a%0D%0Abilinear+PSDM+in+conjunction+with+cloud+analysis+provides+seismic+pounding+risk+estimates+that+are+very+close+to+those%0D%0Aobtained+through+IDA+at+a+small+fraction+of+the+computational+cost+and+without+scaling+the+records.&rft.subject=Pounding%2C+Performance-Based+Design%2C+Probabilistic+Seismic+Demand+Model%2C+Intensity+Measure&rft.publisher=World+Conference+on+Earthquake+Engineering&rft.date=2017-01-12&rft.type=Proceedings+paper&rft.publisher=16th+World+Conference+on+Earthquake%2C+16WCEE+2017&rft.language=eng&rft.source=+++++In%3A++Proceedings+of+the+16th+World+Conference+on+Earthquake+Engineering+(16WCEE+2017).++++World+Conference+on+Earthquake+Engineering%3A+Santiago+de+Chile%2C+Chile.+(2017)+++++&rft.format=text&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F1575840%2F1%2FFreddi_Tubaldi%2520et%2520al.%25202017_16WCEE_Assessment%2520of%2520seismic-induced%2520pounding%2520risk%2520based%2520on%2520probabilistic%2520demand%2520models%2520-%2520Submitted.pdf&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F1575840%2F&rft.rights=open