Double-tube concrete columns with an FRP outer tube and a high-strength steel inner tube

J. G. Teng, Z. H. Wang, T. Yu, Y. Zhao, L. J. Li

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Hybrid FRP-concrete-steel double-tube concrete columns (DTCCs) are a new type of hybrid columns proposed at The Hong Kong Polytechnic University. A hybrid DTCC consists of an outer tube made of FRP and an inner tube made of steel, with all the space inside the two tubes filled with concrete. This combination of materials is expected to lead to a very ductile, high-strength and corrosion-resistant column, even when both the steel and the concrete have very high strengths. In this paper, the results from a series of axial compression tests on hybrid DTCCs with a high-strength steel (HSS) inner tube are presented to demonstrate the excellent structural response of the new column form with a HSS steel tube. The test results confirm that in a DTCC with a HSS steel tube, the local buckling of the HSS tube is effectively prevented and the concrete is very well confined, leading to a very ductile column response. DTCCs thus provide an effective column form for the efficient use of HSS.

Original languageEnglish
Title of host publicationProceedings of the 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016
EditorsJ.G. Dai, J.G. Teng
PublisherDepartment of Civil and Environmental Engineering and Research Institute for Sustainable Urban Development, The Hong Kong Polytechnic University
Pages680-686
Number of pages7
ISBN (Electronic)9789881448026
Publication statusPublished - 1 Jan 2016
Event8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016 - Hong Kong, China
Duration: 14 Dec 201616 Dec 2016

Publication series

NameProceedings of the 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016

Conference

Conference8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016
Country/TerritoryChina
CityHong Kong
Period14/12/1616/12/16

Keywords

  • Axial compression
  • Concrete
  • Confinement
  • FRP
  • High-strength steel
  • Hybrid columns
  • Tubular columns

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Polymers and Plastics

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