Stress-averaged strain model for confined high-strength concrete

Mitsuyoshi Akiyama, Motoyuki Suzuki, Dan M. Frangopol

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

When a concrete structure fails, the damage is usually concentrated in a narrow region. The fracture zone and localization behavior have to be captured to accurately assess the structural behavior. In this research, large-scale high-strength reinforced concrete columns were tested under concentric loading. The experimental results show that in columns with sections ranging from 200 to 500 mm (7.88 to 19.7 in.), the length of the compressive fracture zone increases with the cross section dimension; however, the post-peak compressive fracture energies are independent of cross section dimension and column height, provided that the columns have the same concrete compressive strength and lateral confining pressure. A formalized stress-averaged strain model for confined concrete has been developed by using the compressive fracture energy. Regardless of gauge length, cross section dimension, and concrete strength, the proposed model provides good agreement with the test results.

Original languageEnglish
Pages (from-to)179-188
Number of pages10
JournalACI Structural Journal
Volume107
Issue number2
Publication statusPublished - 2010 Mar
Externally publishedYes

Fingerprint

Fracture energy
Concretes
Concrete construction
Compressive strength
Gages
Reinforced concrete

Keywords

  • Columns
  • Confinement
  • High-strength concrete
  • High-strength steel
  • Localization
  • Stress-strain relations

ASJC Scopus subject areas

  • Building and Construction
  • Civil and Structural Engineering

Cite this

Stress-averaged strain model for confined high-strength concrete. / Akiyama, Mitsuyoshi; Suzuki, Motoyuki; Frangopol, Dan M.

In: ACI Structural Journal, Vol. 107, No. 2, 03.2010, p. 179-188.

Research output: Contribution to journalArticle

Akiyama, M, Suzuki, M & Frangopol, DM 2010, 'Stress-averaged strain model for confined high-strength concrete', ACI Structural Journal, vol. 107, no. 2, pp. 179-188.
Akiyama, Mitsuyoshi ; Suzuki, Motoyuki ; Frangopol, Dan M. / Stress-averaged strain model for confined high-strength concrete. In: ACI Structural Journal. 2010 ; Vol. 107, No. 2. pp. 179-188.
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