Combined shear-torsion behavior of one-way slabs.
Item
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Title
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Combined shear-torsion behavior of one-way slabs.
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Identifier
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AAI9009743
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identifier
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9009743
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Creator
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Jaffarpour, Khalil.
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Contributor
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Adviser: Charles A. Miller
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Date
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1989
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Language
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English
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Publisher
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City University of New York.
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Subject
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Engineering, Civil
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Abstract
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The analysis and design of one-way reinforced concrete plates are usually treated in the same manner as reinforced concrete beams. This is reasonable when the loading is uniformly distributed but leads to difficulties when nonuniform loads are considered. For example, beam analysis applied to a one-way plate loaded with a concentrated load placed eccentric to the centerline leads to internal bending moments, shear forces, and torsional moments. If the ACI Code shear/torsion code provisions are then applied, the predicted strength of the plate can be significantly less than the actual strength. The objective of this research is to investigate the combined shear/torsional strength of one-way reinforced concrete plates. The research is concentrated on plates which have no shear reinforcement.;A series of 54 plates, having width to span ratios varying from 0.29 through 2.0 were tested. The plates were 3" thick and had varying amounts of transverse reinforcement. The plates were loaded with two concentrated loads placed symmetrically about the midspan and symmetrically and non-symmetrically about the centerline. One set of plates were loaded along the centerline, the second set along the free edge, and the third set midway between the centerline and the edge. The plates were loaded to failure. The failure load was generally found to decrease as the load eccentricity increased but increased as the plate width increased up to plates having width/span ratios of about L/B = 1. The load carrying capacity of the wider plates increased by up to 70% when transverse reinforcement was used.;The failure loads were significantly larger than failure loads predicted by the direct application of the ACI Code combined shear/torsion interaction equation when beam analysis is used.;The plate behavior was then investigated by performing a classical plate analysis. Based on the results of this analysis, it was found that the failure loads were higher than the predicted values by the factor of 2.5.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
