ESTIMATION OF EARLY-AGE THERMAL CRACKING TENDENCY OF MASSIVE CONCRETE ELEMENTS BY MEANS OF EQUIVALENT THICKNESS

Based on empirical temperature rules, the influence of the concrete element geometry on early-age thermal crack formation can be assessed in terms of the maximum temperature rise and the maximum temperature difference between element core and surface. The authors use numerical simulation to show that the massivity, defined as the ratio between the volume of the concrete element and the surface, is not a general quantitative parameter. A new parameter is introduced--the equivalent thickness--defined for a separable heat flow area of the concrete element. Numerical simulation suggests that the equivalent thickness enables a good quantitative comparison between different element shapes. The accuracy of the temperature rules is obtained quickly using linear elastic stress calculations.

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  • English

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  • Accession Number: 00727007
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 30 1996 12:00AM