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Influence of Tension Stiffening on the Flexural Stiffness of Reinforced Concrete Circular Sections
Francesco Morelli1, Cosimo Amico2, Walter Salvatore3
1Department of Civil and Industrial Engineering, University of Pisa, 56126 Pisa PI, Italy. francesco.morelli@dic.unipi.it.
Abstract:
Within this paper, the assessment of tension stiffening effects on a reinforced concrete element with the circular sections subjected to axial and bending loads is presented. To this purpose, an enhancement of an analytical model already present within the actual technical literature is proposed. The accuracy of the enhanced method is assessed by comparing the experimental results carried out in past research and the numerical ones obtained by the model. Finally, a parametric study is executed in order to study the influence of axial compressive force on the flexural stiffness of reinforced concrete elements that are characterized by a circular section, comparing the secant stiffness evaluated at yielding and at maximum resistance, considering and not considering the effects of tension stiffness.
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