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dc.contributor.authorKitterman, Stephen S.en_US
dc.date.accessioned2014-03-14T20:39:49Z
dc.date.available2014-03-14T20:39:49Z
dc.date.issued1994-09-15en_US
dc.identifier.otheretd-06112009-063528en_US
dc.identifier.urihttp://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.mediumBTDen_US
dc.publisherVirginia Techen_US
dc.relation.haspartLD5655.V855_1994.K577.pdfen_US
dc.subjectSteel joistsen_US
dc.subject.lccLD5655.V855 1994.K577en_US
dc.titleInvestigation of several aspects of the vibration characteristics of steel member-supported floorsen_US
dc.typeThesisen_US
dc.contributor.departmentCivil Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineCivil Engineeringen_US
dc.contributor.committeechairMurray, Thomas M.en_US
dc.contributor.committeememberEasterling, William Samuelen_US
dc.contributor.committeememberPlaut, Raymond H.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-06112009-063528/en_US
dc.date.sdate2009-06-11en_US
dc.date.rdate2013-05-28
dc.date.adate2009-06-11en_US


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