Seismic performance of CFRP-retrofitted large-scale rectangular RC columns under lateral loading in different directions

Daiyu Wang, Zhenyu Wang, Tao Yu, Hui Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

19 Citations (Scopus)

Abstract

Considerable studies have been carried out on the seismic performance of fiber-reinforced polymer (FRP) retrofitted reinforced concrete (RC) columns. However, research on the seismic performance of FRP-retrofitted RC columns under lateral loading in different directions remains limited. This paper presents an experimental investigation on both un-retrofitted and carbon FRP (CFRP) retrofitted rectangular RC columns with an emphasis on the effect of the directions of lateral loading on the seismic performance of the columns. A total of ten large-scale cantilever rectangular RC columns were constructed and five of them were retrofitted with CFRP wraps at the potential plastic hinge regions. The overall performance of each specimen is examined in terms of damage evolution, lateral load-displacement hysteretic behavior, lateral strength, ductility capacity, stiffness degradation, and energy dissipation. The direction of lateral loading is found to have significant influence on the seismic performance of both un-retrofitted and CFRP-retrofitted rectangular RC columns. It is also found that the shear strength of the un-retrofitted and FRP-retrofitted rectangular RC columns in nonprincipal directions can be predicted based on the lateral strength in the principal directions by the ellipse equation.

Original languageEnglish
Pages (from-to)475-488
Number of pages14
JournalComposite Structures
Volume192
DOIs
Publication statusPublished - 15 May 2018
Externally publishedYes

Keywords

  • FRP
  • Lateral loading directions
  • Rectangular RC columns
  • Seismic performance
  • Seismic retrofit

ASJC Scopus subject areas

  • Ceramics and Composites
  • Civil and Structural Engineering

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