THERMAL COMPATIBILITY OF CONCRETE AND COMPOSITE REINFORCEMENTS

In this paper, thermoelastic solutions of plain and spirally wrapped composite rebar, embedded in concrete and subject to a uniform temperature increase, are presented. Comparisons are made between bars with no spiral wrapping and those produced with a spiral wrap of unidirectional rovings. Results show that the spiral wraping, included primarily to improve the bond between the concrete and the composite rebar, also aids in the reduction of overall thermal expansion of the rebar. Thermoelastic solutions of unidirectional composite rods and concrete predict that the tensile stresses int he concrete surrounding the rebar will exceed the tensile strength of the concrete for relatively small temperature increases. The extent of this cracking cannot be determined from the analytical predictions. To predict the extent of the cracking, nonlinear thermoelastic simulations, completed using the COSMOS-M finite-element code, are used to determine the extent of concrete cracking. Results show that cracking decreases with a decreasing rebar diameter and increasing confining pressure of the concrete.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/10900268
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Gentry, T R
  • Husain, M
• Publication Date: 1999-5

Language

• English

Media Info

• Features: Appendices; Figures; References;
• Pagination: p. 82-86
• Serial:
  • Journal of Composites for Construction
  • Volume: 3
  • Issue Number: 2
  • Publisher: American Society of Civil Engineers
  • ISSN: 1090-0268
  • EISSN: 1943-5614
  • Serial URL: http://ascelibrary.org/journal/jccof2

Subject/Index Terms

• TRT Terms: Composite materials; Expansion; Finite element method; Material reinforcement; Reinforcing bars; Rods; Thermal analysis; Thermoelasticity
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00762370
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 27 1999 12:00AM