Peak displacement patterns for the performance-based seismic design of steel eccentrically braced frames-中国期刊网

摘要 Performance-basedseismicdesign(PBSD)aimstoassessstructuresatdifferentdamagestates.Sincedamagecanbedirectlyassociatedtodisplacements,seismicdesignwithconsiderationofdisplacementseemstobelogical.Inthisstudy,simpleformulaetoestimatethepeakfloordisplacementpatternsofeccentricallybracedframes(EBFs)atdifferentperformancelevelssubjectedtoearthquakegroundmotionsareproposed.TheseformulaeareapplicableinaPBSDandespeciallyindirectdisplacement-baseddesign(DDBD).Parametricstudyisconductedonagroupof30EBFsunderasetof15farfieldandnearfieldaccelerogramswhichtheyscaledtodifferentamplitudestoadaptvariousperformancelevels.TheresultsofthousandsofnonlineardynamicanalysesofEBFshavebeenpost-processedbynonlinearregressionanalysisinordertorecognizethemajorparametersthatinfluencethepeakdisplacementpatternoftheseframes.Resultsshowthatsuggesteddisplacementpatternshaverelativelygoodagreementwiththoseacquiredbyanexactnonlineardynamicanalysis.

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Peak displacement patterns for the performance-based seismic design of steel eccentrically braced frames

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Peak displacement patterns for the performance-based seismic design of steel eccentrically braced frames

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