dc.contributor.author	Barrett, Anthony R.	en
dc.contributor.committeechair	Murray, Thomas M.	en
dc.contributor.committeemember	Wicks, Alfred L.	en
dc.contributor.committeemember	Plaut, Raymond H.	en
dc.contributor.committeemember	Easterling, William Samuel	en
dc.contributor.committeemember	Setareh, Mehdi	en
dc.contributor.committeemember	Charney, Finley A.	en
dc.contributor.department	Civil Engineering	en
dc.date.accessioned	2014-03-14T20:15:56Z	en
dc.date.adate	2006-10-06	en
dc.date.available	2014-03-14T20:15:56Z	en
dc.date.issued	2006-08-21	en
dc.date.rdate	2008-10-06	en
dc.date.sdate	2006-09-06	en
dc.description.abstract	The presented research examined three areas: best practices in high quality dynamic testing of in-situ floor systems, extensive dynamic testing of three bare (non-fit out) in-situ multi-bay steel composite floors to estimate their dynamic parameters/response and to identify trends in dynamic behavior, and development of a set of fundamental finite element (FE) modeling techniques to adequately represent the dynamic response of steel composite floors for the purpose of evaluating vibration serviceability. The measurement, analysis, and computation of a floor's accelerance frequency response function (FRF) is the core premise linking all areas of the presented research. The burst chirp signal using an electrodynamic shaker is recommended as the most accurate and consistent source of excitation for acquiring high quality measurements suitable for use in parameter estimation, operating deflection shape animation, and calibration/validation of FE models. A reduced mid-bay testing scheme is recommended as a time-saving alternative to modal testing over a full coverage area, provided the only desired estimated parameters are frequencies, damping, and mid-bay acceleration response. Accelerance FRFs were measured with an electrodynamic shaker located within 23 unique bays on the three tested floors. Dominant frequencies ranged from 4.85 Hz to 9 Hz and measured estimates of damping varied considerably, ranging from 0.44% to 2.4% of critical (0.5%-1.15% was typical). Testing showed several mode shapes were localized to just a few bays and not all modes were adequately excited by forcing at a single location. The quality of the estimated mode shapes was significantly improved using multi-reference modal testing. FE models for the tested floors were developed based on high quality measured data and were shown to provide adequate representations of measured floor behavior. Fundamental techniques are presented for modeling mass, stiffness, boundary conditions, and performing dynamic analysis. A method of evaluating vibration serviceability was proposed using the FE model's computed accelerance FRF for comparison with a design accelerance curve that represents an acceleration response threshold in the frequency domain. An example design accelerance curve is presented based on current serviceability guidelines for acceleration tolerance and effective harmonic forces due to human activities such as walking.	en
dc.description.degree	Ph. D.	en
dc.identifier.other	etd-09062006-184827	en
dc.identifier.sourceurl	http://scholar.lib.vt.edu/theses/available/etd-09062006-184827/	en
dc.identifier.uri	http://hdl.handle.net/10919/28879	en
dc.publisher	Virginia Tech	en
dc.relation.haspart	Chapter_3.pdf	en
dc.relation.haspart	Chapter_4.pdf	en
dc.relation.haspart	Chapter_6_References.pdf	en
dc.relation.haspart	Chapter_1.pdf	en
dc.relation.haspart	Chapter_0.pdf	en
dc.relation.haspart	Chapter_5.pdf	en
dc.relation.haspart	Chapter_7_Appendices.pdf	en
dc.relation.haspart	Chapter_2.pdf	en
dc.rights	In Copyright	en
dc.rights.uri	http://rightsstatements.org/vocab/InC/1.0/	en
dc.subject	damping	en
dc.subject	vibration	en
dc.subject	floor	en
dc.subject	serviceability	en
dc.subject	walking	en
dc.subject	modal analysis	en
dc.subject	fundamental frequency	en
dc.subject	Finite element method	en
dc.subject	resonance	en
dc.subject	acceleration response	en
dc.subject	mode shape	en
dc.title	Dynamic Testing of In-Situ Composite Floors and Evaluation of Vibration Serviceability Using the Finite Element Method	en
dc.type	Dissertation	en
thesis.degree.discipline	Civil Engineering	en
thesis.degree.grantor	Virginia Polytechnic Institute and State University	en
thesis.degree.level	doctoral	en
thesis.degree.name	Ph. D.	en

Dynamic Testing of In-Situ Composite Floors and Evaluation of Vibration Serviceability Using the Finite Element Method

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