Double-tube concrete columns with a high-strength internal steel tube: Concept and behaviour under axial compression

Jin Guang Teng, Zihao Wang, Tao Yu, Yang Zhao, Li Juan Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

15 Citations (Scopus)

Abstract

This article presents a new form of fibre-reinforced polymer-concrete-steel hybrid columns and demonstrates some of its expected advantages using results from an experimental study. These columns consist of a concrete-filled fibre-reinforced polymer tube that is internally reinforced with a high-strength steel tube and are referred to as hybrid double-tube concrete columns. The three components in hybrid double-tube concrete columns (i.e. the external fibre-reinforced polymer tube, the concrete infill and the internal high-strength steel tube) are combined in an optimal manner to deliver excellent short- and long-term performance. The experimental study included axial compression tests on eight hybrid double-tube concrete columns with a glass fibre–reinforced polymer external tube covering different glass fibre–reinforced polymer tube thicknesses and diameters as well as different high-strength steel tube diameters. The experimental results show that in hybrid double-tube concrete columns, the concrete is well confined by both the fibre-reinforced polymer tube and the high-strength steel tube, and the buckling of the high-strength steel tube is suppressed so that its high material strength can be effectively utilized, leading to excellent column performance. Due to the high yield stress of high-strength steel, the hoop stress developed to confine the core concrete is much higher than can be derived from a normal-strength steel tube, giving the use of high-strength steel in double-tube concrete columns an additional advantage.

Original languageEnglish
Pages (from-to)1585-1594
Number of pages10
JournalAdvances in Structural Engineering
Volume21
Issue number10
DOIs
Publication statusPublished - 1 Jul 2018

Keywords

  • confinement
  • double-tube concrete column
  • fibre-reinforced polymer
  • high-strength steel
  • hybrid column
  • tubular column

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

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