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 dc.contributor.author Kitterman, Stephen S. en_US dc.date.accessioned 2014-03-14T20:39:49Z dc.date.available 2014-03-14T20:39:49Z dc.date.issued 1994-09-15 en_US dc.identifier.other etd-06112009-063528 en_US dc.identifier.uri http://hdl.handle.net/10919/33526 dc.description.abstract Four aspects influencing the vibration characteristics of steel member supported floors were investigated. The four aspects are: 1) the number of tee-beams effective in resisting a heel-drop impact for steel joist and steel beam-concrete slab floors, 2) the effective moment of inertia of steel joist and joist-girder members, 3) the ability of joist seats to provide composite behavior between the supporting member and overlying slab, and 4) the effects of extending and restraining the bottom chords of joist members. A new equation was developed to predict the number of effective tee-beams. The proposed equation is recommended to replace the two current equations. The proposed equation is a regression equation based on the results of a finite element analysis of 240 floor systems and is considered to be more accurate than the current equations. Next, a study was undertaken to determine the relationship between the span-to depth ratio of a joist or joist-girder member and it's effective moment of inertia. Twenty five joists and joist-girders were modeled and analyzed using the finite element method and their effective stiffnesses calculated. The effective stiffness of each member was plotted against the respective span-to-depth ratio. A linear regression line was then fit to the data to mathematically represent the trend. Finally, a vibration test floor was constructed to investigate the joist seat behavior and extended bottom chords. Finite element models were developed and analyzed and frequency and stiffness tests were performed to evaluate the floor's behavior. Conclusions were then drawn and recommendations made concerning the joist seat behavior and the effects of extending joist bottom chords. en_US dc.format.medium BTD en_US dc.publisher Virginia Tech en_US dc.relation.haspart LD5655.V855_1994.K577.pdf en_US dc.subject Steel joists en_US dc.subject.lcc LD5655.V855 1994.K577 en_US dc.title Investigation of several aspects of the vibration characteristics of steel member-supported floors en_US dc.type Thesis en_US dc.contributor.department Civil Engineering en_US dc.description.degree Master of Science en_US thesis.degree.name Master of Science en_US thesis.degree.level masters en_US thesis.degree.grantor Virginia Polytechnic Institute and State University en_US thesis.degree.discipline Civil Engineering en_US dc.contributor.committeechair Murray, Thomas M. en_US dc.contributor.committeemember Easterling, William Samuel en_US dc.contributor.committeemember Plaut, Raymond H. en_US dc.identifier.sourceurl http://scholar.lib.vt.edu/theses/available/etd-06112009-063528/ en_US dc.date.sdate 2009-06-11 en_US dc.date.rdate 2013-05-28 dc.date.adate 2009-06-11 en_US
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