Durability design approach for GFRP bar reinforced concrete (RC) members

Jianwei Huang, Riyad Aboutaha

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In current International Codes for FRP Reinforced Concrete, an environmental reduction factor is applied to the tensile strength of GFRP bar to account for its long-term durability. In this paper, the approaches for the durability design of GFRP bars are discussed and corresponding limitations are addressed, followed by presentation of a newly developed design approach, which incorporates the effects of relative humidity, exposure temperature, and design life. By using time extrapolation and time-temperature shift approaches, a new equation for design strength of GFRP bar under various exposure time and temperature was proposed. The effect of moisture, in the form of relative humidity, was incorporated into the new equation by investigating the relationship between the relative humidity and concrete pore water. On the basis of reported durability data for E-glass/VE GFRP bars embedded in moist concrete, reduction factors linked to service life, temperature and relative humidity were obtained. By utilizing the new approach presented in this paper, more refined and accurate design values for long-term tensile strength of a GFRP bar could be achieved.

Original languageEnglish (US)
Title of host publication10th International Symposium on Fiber-Reinforced Polymer Reinforcement for Concrete Structures 2011, FRPRCS-10
Pages1135-1147
Number of pages13
Edition275 SP
StatePublished - Dec 1 2011
Event10th International Symposium on Fiber-Reinforced Polymer Reinforcement for Concrete Structures 2011, FRPRCS-10, in conjunction with the ACI Spring 2011 Convention - Tampa, FL, United States
Duration: Apr 2 2011Apr 4 2011

Publication series

NameAmerican Concrete Institute, ACI Special Publication
Number275 SP
Volume2
ISSN (Print)0193-2527

Other

Other10th International Symposium on Fiber-Reinforced Polymer Reinforcement for Concrete Structures 2011, FRPRCS-10, in conjunction with the ACI Spring 2011 Convention
CountryUnited States
CityTampa, FL
Period4/2/114/4/11

Keywords

  • Concrete reinforcement
  • Design strength
  • Durability
  • Environmental reduction factors
  • GFRP bars

ASJC Scopus subject areas

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

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  • Cite this

    Huang, J., & Aboutaha, R. (2011). Durability design approach for GFRP bar reinforced concrete (RC) members. In 10th International Symposium on Fiber-Reinforced Polymer Reinforcement for Concrete Structures 2011, FRPRCS-10 (275 SP ed., pp. 1135-1147). (American Concrete Institute, ACI Special Publication; Vol. 2, No. 275 SP).