BEHAVIOR OF CONCRETE UNDER DYNAMIC TENSILE LOADS

A realistic nonlinear stress-strain model that can describe the dynamic tensile behavior of concrete is presented. The model is obtained by generalizing rate-independent nonlinear tensile stress-strain relations for concete. The static tensile behavior of concrete is modeled on the basis of the concept of microcrack planes. The inelastic phenomena such as microcracking occur predominantly on certain weak planes within the material. The orientations of these weak planes are considered to be uniformly distributed in the concrete. The model based on this concept describes well the static tensile test results of concrete. The affinity transformations are employed to model the effect of strain rate. The material parameters are characterized in terms of the strain rate magnitude. The present theory, which can model the dynamic tensile behavior of concrete, is compared with the dynamic tensile test data available in the literature. An equation is proposed to predict the increase of tensile strength due to an increase of strain rate. It is found that the effect of strain rate is more sensitive in tension than in compression. The model describes adequately the dynamic tensile behavior of concrete and allows more realistic dynamic analysis of concrete structures.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0889325X
• Corporate Authors:

  American Concrete Institute

  P.O. Box 19150, Redford Station, 22400 Seven Mile Road
  Detroit, MI  United States  48219
• Authors:
  • Oh, B H
• Publication Date: 1987-1

Media Info

• Features: Figures; References;
• Pagination: p. 8-13
• Serial:
  • American Concrete Institute, Journal of
  • Volume: 84
  • Issue Number: 1
  • Publisher: American Concrete Institute
  • ISSN: 0889-325X

Subject/Index Terms

• TRT Terms: Concrete; Deformation curve; Dynamic loads; Mathematical models; Mechanical strain; Nonlinear equations; Physical properties; Tensile strength; Tension
• Uncontrolled Terms: Concrete properties; Strain rate
• Old TRIS Terms: Tensile load
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00472948
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 30 1987 12:00AM