Crack Assessment of a Very Thick and Bloc-Like Concrete Member

Peter Joachim Heinrich, Dirk Schlicke

Research output: Contribution to journalArticleResearchpeer-review

Abstract

This paper presents the results of recent research activities on the hardening-induced stresses and the risk of cracking in very thick concrete members. These activities focus on a very large member with bloc-like dimensions. In contrast to typical member types such as ground slabs or foundation walls, bloc-like members are dominated by temperature gradients in all three dimensions (height, width and length) at the same time. Besides, the comparably high stiffness of these members leads to very low external restraints in cases of common applications. In these cases the members considered show distinct eigenstresses (residual stresses or self-balanced stresses) but only low restraint forces and moments. The assessment of the hardening-induced cracking of such members therefore requires a detailed analysis of the temperature and stress fields.
This contribution presents comprehensive investigations on the hardening-induced risk of cracking of a typical bloc-like concrete member in the form of an underwater foundation. The results of the simulation were compared with selected practical observations during the construction of the underwater foundation of a recently built bridge.
Translated title of the contributionRissbeurteilung eines massigen Betonbauteils
Original languageEnglish
Article number6
Pages (from-to)41-48
Number of pages8
JournalSlovak Journal of Civil Engineering
Volume26
Issue number3
DOIs
Publication statusPublished - 1 Sep 2018

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Underwater foundations
Hardening
Concretes
Cracks
Forms (concrete)
Thermal gradients
Residual stresses
Stiffness
Temperature

Keywords

  • Mass concrete
  • Restraint stresses
  • Unreinforced concrete
  • Viscoelasticity
  • Risk of cracking
  • Crack width

Fields of Expertise

  • Advanced Materials Science

Cite this

Crack Assessment of a Very Thick and Bloc-Like Concrete Member. / Heinrich, Peter Joachim; Schlicke, Dirk.

In: Slovak Journal of Civil Engineering, Vol. 26, No. 3, 6, 01.09.2018, p. 41-48.

Research output: Contribution to journalArticleResearchpeer-review

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N2 - This paper presents the results of recent research activities on the hardening-induced stresses and the risk of cracking in very thick concrete members. These activities focus on a very large member with bloc-like dimensions. In contrast to typical member types such as ground slabs or foundation walls, bloc-like members are dominated by temperature gradients in all three dimensions (height, width and length) at the same time. Besides, the comparably high stiffness of these members leads to very low external restraints in cases of common applications. In these cases the members considered show distinct eigenstresses (residual stresses or self-balanced stresses) but only low restraint forces and moments. The assessment of the hardening-induced cracking of such members therefore requires a detailed analysis of the temperature and stress fields.This contribution presents comprehensive investigations on the hardening-induced risk of cracking of a typical bloc-like concrete member in the form of an underwater foundation. The results of the simulation were compared with selected practical observations during the construction of the underwater foundation of a recently built bridge.

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