Modeling of steel and concrete strains between primary cracks for the prediction of cover-controlled cracking in RC-beams |
| |
Authors: | Arnaud Castel Raoul François |
| |
Affiliation: | a Université de Nice-Sophia Antipolis; Lab. J.A. Dieudonné, UMR CNRS 6621, Parc Valrose, 06108 Nice Cedex 2, Franceb Université de Toulouse; UPS, INSA; LMDC (Laboratoire Matériaux et Durabilité des Constructions); 135, Avenue de Rangueil; F-31 077 Toulouse cedex 04, France |
| |
Abstract: | After cracking, the intact concrete between two consecutive primary cracks remains elastic and the maximum concrete stress is less than the tensile strength of concrete. However, under increasing loading, cover-controlled cracks occur at the steel-concrete interface causing a loss of bond and hence a loss of tension stiffness. The cover-controlled cracks are internal concrete cracks that initiate at steel rib location and are contained within the concrete cover. In this paper, steel and concrete strain distribution between two consecutive primary cracks are modeled based on a linear assumed distribution of the bond stress at the steel-concrete interface. The accurate calculation of the tensile concrete strain allows introducing new criteria for cover-control cracking initiation based on a peak value of steel stress calculated at crack location. |
| |
Keywords: | Reinforced concrete Tension stiffening model Bond Interface damage |
本文献已被 ScienceDirect 等数据库收录! |
|