“Effects of Spacing and Configuration of Web Reinforcement on shear Behavior of Reinforced Concrete Beams”
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Date
2015-12
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Addis Ababa University
Abstract
Shear behavior of beams was a major research area for over a century. However due to the fact that this behavior is dictated by different factors, researchers throughout the world have not come into a common understanding of a defined theory for predicting the shear behavior of beams. Spacing and configuration of stirrups has not been given emphasis as one of the factors affecting the shear behavior of beams. In this study, over 12 well-known building codes were examined for their provision of shear capacity calculation. Each of them has the term “spacing” in their provisions. However, in all of this Building Codes, as long as the web reinforcement ratio (area of stirrup/ spacing) is kept the same, altering spacing of stirrups will not result in different shear capacity prediction.
Three shear-critical beam specimens were examined through experiment to study whether or not the shear behavior is affected by spacing and configuration of stirrups and it was observed that the shear capacity increases inversely with spacing of stirrups.
Analytical simulation was attempted using a non-linear 3D finite element tool called DuCOM-COM3 for a series of shear-critical beams with different arrangement of stirrups and different concrete grades.
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Structural Engineering