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International Journal of Fracture

, Volume 34, Issue 4, pp 263–279 | Cite as

The concrete cylinder: stress analysis and failure modes

  • H. J. Petroski
  • R. P. Ojdrovic
Article

Abstract

The rationale for using the circular cylindrical specimen for determining the tensile strength of concrete is reviewed, and the stress fields and fracture modes associated with the familiar splitting test and a pressurized cylinder test are discussed. Special attention is paid to contradictory reports and unresolved issues in the literature as to exactly how the fracture of a concrete cylinder develops and progresses under increasing load.

The effect of a macrocrack on the stress field within a cylinder is introduced as a means of understanding the progressive fracture of a cylindrical specimen. In particular, it is argued that, while the idealized stress field in an unflawed cylinder may explain how and where the first macrocrack develops in a cylindrical specimen, it is the stress field modified by the presence of the macrocrack that must be considered to understand subsequent behavior. This point of view enables us to take a unified view of a variety of different observations about the indirect tensile mode of failure.

The axial tensile failure of a concrete cylinder loaded by radial pressure is also considered in the context of classical elastic stress analysis. Whereas this failure mode has been described as “paradoxical” in the literature, we demonstrate that the induced tensile stress field is indeed of sufficient magnitude to explain the axial failure under radial pressure by an elementary strength of materials argument.

Keywords

Stress Field Failure Mode Fracture Mode Cylindrical Specimen Cylinder Test 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Résumé

On examine les motivations d'utiliser une éprouvette à section cylindrique pour déterminer la résistance à la traction du béton, et on discute des champs de contraintes et des modes de rupture correspondant à l'essai classique de séparation et à l'essai sur cylindres soumis à pression. Les rapports de caractère contradictoire, et les données non résolues figurant dans la littérature, sont examinés en particulier en ce qui regarde la maniére exacte selon laquelle se développe et progresse sous charges croissantes une rupture dans un cylindre en béton.

Un moyen de comprendre la rupture progressive d'une éprouvette cylindrique est d'introduire l'effet d'une microfissure sur le champ de contraintes dans un cylindre. En particulier, on avance que si un champ de contraintes idéal dans un cylindre sans défauts peut expliquer comment et où la première microfissure se développe dans une éprouvette cylindrique, c'est le champ de contraintes modifié par la présence des microfissures qui est à prendre en considération pour comprendre le comportement subséquent.

Cette opinion permet aux auteurs d'adopter une vision globale d'une série d'observations diverses sur un mode de rupture par contraintes indirectes.

On considère également le cas de la rupture par contraintes axiales d'un cylindre de béton sollicité par une pression radiale, dans le cadre d'une analyse classique des contraintes élastiques.

Bien que ce mode de rupture ait été décrit dans la littérature comme paradoxal, on démontre que l'amplitude du champ de contraintes de traction induites est bien suffisante pour expliquer la rupture axiale sous pression radiale, en recourant à une explication basée sur la résistance élémentaire des matériaux.

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Copyright information

© Martinus Nijhoff Publishers 1987

Authors and Affiliations

  • H. J. Petroski
    • 1
  • R. P. Ojdrovic
    • 1
  1. 1.Department of Civil and Environmental EngineeringDuke UniversityDurhamUSA

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