Simplified Effective Compressive Strengths of Columns with Intervening Floor Slabs

Seung Ho Choi, Jin Ha Hwang, Sun Jin Han, Hae Chang Cho, Jae Hyun Kim, Kang Su Kim

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

The current design codes discuss the effective compressive strengths of columns, which reflect a decrease in load transfer performance that can occur when columns and slabs have different concrete compressive strengths. The effective compressive strength of a column increases as it is confined by the slab, and the design codes mandate three different effective compressive strengths for interior columns (confinement on four sides), exterior columns (confinement on three sides), and corner columns (confinement on two sides). For both corner and exterior columns, the confinement effect of the slab is significantly smaller than that for the interior column, and there is a more marked decrease in load transfer performance. However, there is still a lack of theoretical studies investigating the effective compressive strengths of the corner and exterior columns. Therefore, based on the analysis model established in previous research, this study has proposed an equation for calculating the effective compressive strengths of the corner, exterior and isolated columns without any confinement effects of the slab. In addition, axial loading tests of isolated columns were conducted and the proposed equation was verified.

Original languageEnglish
Article number42
JournalInternational Journal of Concrete Structures and Materials
Volume14
Issue number1
DOIs
StatePublished - 1 Dec 2020

Keywords

  • column
  • effective compressive strength
  • high strength concrete
  • normal strength concrete
  • reinforced concrete
  • slab

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