Title

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

RIS ID

129221

Publication Details

Teng, J., Wang, Z., Yu, T., Zhao, Y. & Li, L. (2018). Double-tube concrete columns with a high-strength internal steel tube: Concept and behaviour under axial compression. Advances in Structural Engineering: an international journal, 21 (10), 1585-1594.

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.

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Link to publisher version (DOI)

http://dx.doi.org/10.1177/1369433217746838