A Mechanical Model For Compressed Concrete In R/C Beams
Author(s)
A.P. Fantilli, D. Ferretti, I. lori & P. Vallini
Abstract
A mechanical model for compressed concrete
in R/C beams
A.P. Fantilli*, D. Ferretti*, I. lori^ & P. Vallini'
Department of Structural and Geotechnical Engineering, Politecnico di
Torino, Torino, Italy.
Department of Civil Engineering, University of Parma, Parma, Italy.
Abstract
The distribution of stress in the compression zone of R/C beams subjected to
flexure is usually computed by means of uniaxial stress-strain relationships.
When crushing of compressed concrete occurs, the effect of curvature (or strain
gradient) becomes important and uniaxial stress-strain curves are no more
representative of physical evidence. To overcome this difficulty, in this paper
crushing of concrete is modelled by means of sliding planes, which allow the
expulsion of v-shaped concrete blocks. The mathematical description of the
mechanical behaviour of this sliding phenomenon leads to a stress-strain
relationship for concrete with a particular softening branch whose shape depe
Keywords
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