Shear Capacity of Normal, Lightweight, and High-Strength Concrete Beams according to Model Code 2010. I: Experimental Results versus Analytical Model Results
Publication: Journal of Structural Engineering
Volume 139, Issue 9
Abstract
Many models to determine the shear capacity of shear reinforced beams are based on the truss analogy. Various proposals have been formulated in recent years, all of which differ with regard to the limits of strut inclination. Remarkably, those limits do not depend on the type of concrete, which could be expected to be critical for the shear friction capacity of the cracks, which is supposed to be a major influencing factor with regard to the limit of strut rotation. Tests on beams with I-shaped cross sections have been carried out on beams made of normal, lightweight, and high-strength concrete. The experimental results are compared, in Part I of this paper, with those obtained by analytical models and, in Part II, with those obtained by nonlinear finite element programs tailored to this specific application. The result is that the type of concrete does not lead to significant changes in strut rotation capacity, so that the strut rotation limit values have general validity. The level of approximation approach, as presented in the Fédération Internationale du Béton/International Federation for Structural Concrete (fib) Model Code of Concrete Structures 2010 is justified: more sophisticated calculation models lead indeed to more accuracy in the determination of the shear capacity.
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Published In
Journal of Structural Engineering
Volume 139 • Issue 9 • September 2013
Pages: 1593 - 1599
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Apr 21, 2012
Accepted: Sep 13, 2012
Published online: Sep 18, 2012
Published in print: Sep 1, 2013
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