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The effect of stiffness and mass on the dynamic response of wood floors /Li, Xiaoming, January 1993 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1993. / Vita. Abstract. Includes bibliographical references (leaves 130-136). Also available via the Internet.
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The effects of cutouts in joists on the vibrational response of wood floors /Stiess, Timothy Stephen. January 1994 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1994. / Vita. Abstract. Includes bibliographical references (leaves 111-114). Also available via the Internet.
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Floating floor attenuation of impact structure-borne sound in timber constructionHacene-Djaballah, Nouri. January 2009 (has links)
Thesis (M.S.)--George Mason University, 2009. / Vita: p. 42. Thesis director: Girum Urgessa. Submitted in partial fulfillment of the requirements for the degree of Master of Science in Civil, Environmental, and Infrastructure Engineering. Title from PDF t.p. (viewed Oct. 12, 2009). Includes bibliographical references (p. 39-41). Also issued in print.
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Vibration acceptability in wood floor systemsJohnson, James R. 07 April 2009 (has links)
Two distinct sections of research are presented in this thesis. The first section summarizes research conducted on laboratory-built floors. Floors were built and tested to determine the plywood contribution to increasing the bending stiffness, number of joists effective in resisting applied load, and calculation of fundamental frequency. The second section summarizes research conducted on in-situ floors. Procedures were developed to numerically integrate acceleration and velocity data to obtain displacement values. Tests were conducted on 86 subjectively rated wood floors to determine average frequency and peak displacement values. From these tests, a design criterion was developed to predict acceptability of a wood floor system to vibrations. / Master of Science
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The effect of stiffness and mass on the dynamic response of wood floorsLi, Xiaoming 11 June 2009 (has links)
This thesis describes the effects of coefficient of variation (COV) of joist modulus of elasticity (MOE), floor mass and stiffness, imposed load, and boundary conditions on the floor vibrational performance. Three main parameters used to describe the vibration are resonant frequency, damping ratio, and root mean square (RMS) acceleration. The results showed that COV of joist MOE affected the fundamental frequency, and had no significant effect on damping ratio and RMS acceleration. The floor mass and stiffness affected all the three parameters to different degrees. Imposed load affected most of the vibrational parameters. The boundary conditions investigated affect the mode 2 resonant frequency, but have no significant effect on the damping ratio and RMS acceleration. In addition, the load sharing capacity was evaluated in terms of the percentage of load carried by each joist within a floor. / Master of Science
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Analysis and computer program for non-prismatic continuous beam and floor sectionMaghsood, Javad January 1967 (has links)
M.S.
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The effects of cutouts in joists on the vibrational response of wood floorsStiess, Timothy Stephen 09 May 2009 (has links)
This thesis presents the effects of cutouts in joists on the dynamic performance of wood floors. Ten floors and four-floor joist types were used to evaluate the vibrational response of wood floors with and without cutouts in the joists. Each floor was also subjected to different boundary conditions and imposed load during the evaluation. Two types of tests were performed on the floors, a free vibration test and a drop weight test. Data collected from these tests were used to determine several dynamic variables. These variables are the peak displacement, peak acceleration, resonant frequencies, separation of resonant frequencies, root-mean-squared (RMS) acceleration, log-decrement damping ratio, and modal damping ratios. Included in the thesis are the results of a static test (load sharing) performed on the floors with and without cutouts in the joists. / Master of Science
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