ASSESSMENT OF TOUGHNESS OF CONCRETE SUBJECT TO ELEVATED TEMPERATURES FROM A COMPLETE LOAD-DISPLACEMENT CURVE--PART 1: GENERAL INTRODUCTION

The fracture and toughness of concrete is significantly influenced by heating scenarios, including heating temperature and exposure time, but thus far the information on the quantitative assessment of concrete toughness is very limited. In this study, six energy-based and deformation-based toughness indexes were summarized and compared for assessing the concrete toughness. A two-portion complete load-displacement relationship containing load, characteristic displacements, and geometric coefficients were also proposed, and the physical meanings of these parameters were illustrated. Meanwhile, the effect of self-weight of the beam specimen under three-point bending on the concrete toughness was considered. In general, the energy-based toughness indexes were more appropriate than the deformation-based ones, and toughness indexes covering the whole failure process were more appropriate and applicable than those only covering the ascending branch. In Part 2 of this paper, the relationships of these parameters with heating temperature, exposure time, and even curing age are determined based on the three-point bending tests on preheated concrete beams. Thus, the effects of these influencing factors on the concrete toughness can be quantitatively assessed by using the six proposed toughness indexes.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/13846872
• Supplemental Notes:
  • Part of this work was carried out under a Scottish Nuclear Limited Contract PP/120543/DGD/HN.
• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • ZHANG, B
  • Bicanic, N
  • Pearce, C J
  • Balabanic, G
• Publication Date: 2000-9

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 550-555
• Serial:
  • ACI Materials Journal
  • Volume: 97
  • Issue Number: 5
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0889-325X
  • Serial URL: https://www.concrete.org/publications/acimaterialsjournal.aspx

Subject/Index Terms

• TRT Terms: Beams; Bending; Concrete; Deformation; Energy; Evaluation and assessment; Failure; Fracture properties; High temperature; Loads; Toughness
• Subject Areas: Energy; Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00800658
• Record Type: Publication
• Contract Numbers: PP/120543/DGD/HN, DMS/9313013, GR6490
• Files: TRIS
• Created Date: Oct 21 2000 12:00AM