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Characterizing the Load-Deformation Behavior of Steel Deck Diaphragms using Past Test Data

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dc.contributor.authorO'Brien, Patrick Emmeten
dc.contributor.committeechairEatherton, Matthew R.en
dc.contributor.committeechairEasterling, William Samuelen
dc.contributor.committeememberMoen, Cristopher D.en
dc.contributor.departmentCivil and Environmental Engineeringen
dc.date.accessioned2017-08-08T08:00:32Zen
dc.date.available2017-08-08T08:00:32Zen
dc.date.issued2017-08-07en
dc.description.abstractRecent research has identified that current code level seismic demands used for diaphragm design are considerably lower than demands in real structures during a seismic event. However, historical data has shown that steel deck diaphragms, common to steel framed buildings, perform exceptionally well during earthquake events. A new alternative diaphragm design procedure in ASCE 7-16 increases diaphragm seismic demand to better represent expected demands. The resulting elastic design forces from this method are reduced by a diaphragm design force reduction factor, Rs, to account for the ductility of the diaphragm system. Currently, there exist no provisions for Rs factors for steel deck diaphragms. This research was therefore initiated to understand inelastic steel deck diaphragm behavior and calculate Rs factors. A review of the literature showed that a large number of experimental programs have been performed to obtain the in-plane load-deformation behavior of steel deck diaphragms. To unify review of these diaphragm tests and their relevant results, a database of over 750 tested specimens was created. A subset of 108 specimens with post-peak, inelastic behavior was identified for the characterization of diaphragm behavior and ductility. A new recommended method for predicting shear strength and stiffness for steel deck diaphragms with structural concrete fill is proposed along with an appropriate resistance factor. Diaphragm system level ductility and overstrength are estimated based on subassemblage test results and Rs factors are then calculated based on these parameters. The effects of certain variables such as deck thickness and fastener spacing on diaphragm ductility are explored.en
dc.description.degreeMaster of Scienceen
dc.format.mediumETDen
dc.identifier.othervt_gsexam:12271en
dc.identifier.urihttp://hdl.handle.net/10919/78679en
dc.publisherVirginia Techen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectSteel Deck Diaphragmsen
dc.subjectSteel Deck Diaphragms with Concrete Fillen
dc.subjectDiaphragm Design Force Reduction Factorsen
dc.subjectDiaphragm Ductilityen
dc.subjectSeismic Designen
dc.titleCharacterizing the Load-Deformation Behavior of Steel Deck Diaphragms using Past Test Dataen
dc.typeThesisen
thesis.degree.disciplineCivil Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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