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

Advances in Structural Engineering - Tập 21 Số 10 - Trang 1585-1594 - 2018
J.G. Teng1, Zihao Wang2,1, Tao Yu3, Zhao Yang2, Lijuan Li4
1Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
2College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, China
3School of Civil, Mining & Environmental Engineering, University of Wollongong, Wollongong, NSW, Australia
4School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, China

Tóm tắt

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.

Từ khóa


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Thông tin xuất bản

Advances in Structural Engineering

Tập 21 Số 10

1585-1594

Thông tin tác giả