Textile reinforced engineered cementitious composites (TR-ECC) overlays for the strengthening of RC beams

J. G. Dai, B. Wang, S. L. Xu

Research output: Unpublished conference presentation (presented paper, abstract, poster)Conference presentation (not published in journal/proceeding/book)Academic researchpeer-review

18 Citations (Scopus)

Abstract

This paper presents test results of a series of reinforced concrete (RC) beams, which were externally bonded with cement-based fibre composites with/without textile reinforcement. A total of 10 control and strengthened beams were tested. The tested parameters covered the tensile stiffness of textile reinforcement, the type of cementitious matrix and the anchorage length of the textile reinforced composites. It was found that textile reinforced engineered cementitious composite (TR-ECC) is an ideal composite overlay system for the strengthening of RC members. Due to the use of a cement-based matrix, the TR-ECC is advantageous over the current externally bonded FRP systems in terms of the fire resistance and the material compatibility between the strengthening layer and the original RC beam. Besides, differing from current fibre reinforced polymer (FRP) composites, which are linear elastic, TR-ECC possesses pseudo-plasticity due to the formation of micro-cracks in the ECC, leading to improved ductility of the strengthening system, while the textiles remain linear. Another encouraging founding from this study is that TR-ECC strengthened RC beams hardly failed due to intermediate crack-induced debonding (IC debonding), which is popularly found but difficult to avoid in the current externally bonded FRP systems. Therefore, TR-ECC may become an alternative to current externally bonded FRP systems for the strengthening of concrete structures.

Original languageEnglish
Pages75-80
Number of pages6
Publication statusPublished - 1 Jan 2009
Event2nd Asia-Pacific Conference on FRP in Structures, APFIS 2009 - Seoul, Korea, Republic of
Duration: 9 Dec 200911 Dec 2009

Conference

Conference2nd Asia-Pacific Conference on FRP in Structures, APFIS 2009
Country/TerritoryKorea, Republic of
CitySeoul
Period9/12/0911/12/09

Keywords

  • Debonding
  • ECC
  • RC beams
  • Strengthening
  • Textile

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Civil and Structural Engineering
  • Building and Construction

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