Fictitious Crack Propagation in Fiber-Reinforced Concrete Beams
Publication: Journal of Engineering Mechanics
Volume 127, Issue 3
Abstract
A nonlinear cracked hinge model is developed, aimed at the analysis of the bending fracture of fiber-reinforced concrete beams. The model is based on the fracture mechanics concepts of the fictitious crack model with a bilinear stress-crack opening relationship. Closed-form solutions are presented for the moment-rotation relationship of the hinge as a crack propagates, and the case of a nonzero normal force is covered. Special shapes of the stress-crack opening relationship are treated separately. These shapes are the so-called drop-linear and the drop-horizontal for which simplified expressions are obtained. The applicability of the hinge model is demonstrated through analysis of the bending fracture process in the case of a three-point bending beam and an infinitely long beam on a Winkler foundation, the latter analysis comprising the effect of a constant tensile normal force.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 127 • Issue 3 • March 2001
Pages: 272 - 280
History
Received: Feb 3, 2000
Published online: Mar 1, 2001
Published in print: Mar 2001
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