Hybrid FRP-concrete-steel double-skin tubular columns: Cyclic axial compression tests

Tao Yu, Yu Bo Cao, Bing Zhang, Jinguang Teng

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

2 Citations (Scopus)

Abstract

Hybrid FRP-concrete-steel double-skin tubular columns (hybrid DSTCs) are a new form of hybrid columns recently developed at The Hong Kong Polytechnic University. A hybrid DSTC consists of an inner steel tube, an outer FRP tube and a concrete infill between the two tubes. Hybrid DSTCs possess many important advantages over existing column forms, including their excellent corrosion resistance and excellent seismic resistance. While a large amount of research has been conducted on the monotonic behavior of this novel form of columns, only a limited amount of work has been conducted on their behavior under cyclic loading. This paper presents the first experimental study on hybrid DSTCs under cyclic axial compression, with a particular emphasis on the effect of different cyclic loading schemes and on the behavior of the confined concrete. Hybrid DSTCs are shown by these tests to be very ductile under cyclic axial compression, with an envelope axial load-strain curve being almost the same as the axial load-strain curve of a corresponding DSTC under monotonic compression. It is also shown that repeated unloading/reloading cycles have a cumulative effect on the permanent strain and the stress deterioration of the confined concrete in hybrid DSTCs.
Original languageEnglish
Title of host publicationProceedings of the 6th International Conference on FRP Composites in Civil Engineering, CICE 2012
PublisherInternational Institute for FRP in Construction (IIFC)
Publication statusPublished - 1 Jan 2012
Event6th International Conference on FRP Composites in Civil Engineering, CICE 2012 - Rome, Italy
Duration: 13 Jun 201215 Jun 2012

Conference

Conference6th International Conference on FRP Composites in Civil Engineering, CICE 2012
CountryItaly
CityRome
Period13/06/1215/06/12

Keywords

  • Concrete
  • Cyclic compression
  • FRP
  • Hybrid columns
  • Steel
  • Tubular columns

ASJC Scopus subject areas

  • Polymers and Plastics
  • Civil and Structural Engineering

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