Flexural strength and deflection characteristics of high-strength concrete beams with hybrid FRP and steel bar reinforcement

Young Soo Yoon, Jun Mo Yang, Kyung Hwan Min, Hyun Oh Shin

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

5 Citations (Scopus)

Abstract

The flexural strength and deflection of high-strength concrete beams reinforced with multiple layers of reinforcement and combinations of different reinforcement types (steel, GFRP, and CFRP bars) were evaluated experimentally and analytically. Three beam specimens, reinforced with a single type of reinforcement, and three other specimens, reinforced with a combination of different types of reinforcement, were constructed and tested. An investigation was performed on the influence of hybrid reinforcing with multiple layers of steel or FRP flexural reinforcements on load-carrying capacity, post cracking stiffness, cracking pattern, and ductility. The low post cracking stiffness, high deflection, deep crack propagation, large crack width, and low ductility of FRP bar-reinforced beams were controlled and improved by hybrid reinforcing with steel bars. The test results were compared with the cracking and ultimate moment predictions of ACI Code, and with the service deflection predictions of ACI 440.1R-06 and Bischoff. In addition, alternative service deflection prediction models for hybrid reinforced concrete beams with multiple layers of steel or FRP bars were proposed based on the effective moment of inertia approach of ACI 440.1R-06 and Bischoff.

Original languageEnglish
Title of host publication10th International Symposium on Fiber-Reinforced Polymer Reinforcement for Concrete Structures 2011, FRPRCS-10
Pages57-77
Number of pages21
Edition275 SP
Publication statusPublished - 2011 Dec 1
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: 2011 Apr 22011 Apr 4

Publication series

NameAmerican Concrete Institute, ACI Special Publication
Number275 SP
Volume1
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
Period11/4/211/4/4

Keywords

  • Cracking
  • Deflection
  • Fiber-reinforced polymer
  • Flexural strength
  • High-strength concrete
  • Hybrid reinforcement

ASJC Scopus subject areas

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

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  • Cite this

    Yoon, Y. S., Yang, J. M., Min, K. H., & Shin, H. O. (2011). Flexural strength and deflection characteristics of high-strength concrete beams with hybrid FRP and steel bar reinforcement. In 10th International Symposium on Fiber-Reinforced Polymer Reinforcement for Concrete Structures 2011, FRPRCS-10 (275 SP ed., pp. 57-77). (American Concrete Institute, ACI Special Publication; Vol. 1, No. 275 SP).