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Numerical simulation on structural behavior of UHPFRC beams with steel and GFRP bars
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  • Journal title : Computers and Concrete
  • Volume 16, Issue 5,  2015, pp.759-774
  • Publisher : Techno-Press
  • DOI : 10.12989/cac.2015.16.5.759
 Title & Authors
Numerical simulation on structural behavior of UHPFRC beams with steel and GFRP bars
Yoo, Doo-Yeol; Banthia, Nemkumar;
 Abstract
This study simulates the flexural behavior of ultra-high-performance fiber-reinforced concrete (UHPFRC) beams reinforced with steel and glass fiber-reinforced polymer (GFRP) rebars. For this, micromechanics-based modeling was first carried out on the basis of single fiber pullout models considering inclination angle. Two different tension-softening curves (TSCs) with the assumptions of 2-dimensional (2-D) and 3-dimensional (3-D) random fiber orientations were obtained from the micromechanics-based modeling, and linear elastic compressive and tensile models before the occurrence of cracks were obtained from the mechanical tests and rule of mixture. Finite element analysis incorporating smeared crack model was used due to the multiple cracking behaviors of structural UHPFRC beams, and the characteristic length of two times the element width (or two times the average crack spacing at the peak load) was suggested as a result of parametric study. Analytical results showed that the assumption of 2-D random fiber orientation is appropriate to a non-reinforced UHPFRC beam, whereas the assumption of 3-D random fiber orientation is suitable for UHPFRC beams reinforced with steel and GFRP rebars due to disorder of fiber alignment from the internal reinforcements. The micromechanics-based finite element analysis also well predicted the serviceability deflections of UHPFRC beams with GFRP rebars and hybrid reinforcements.
 Keywords
ultra-high-performance fiber-reinforced concrete;flexure;micromechanics;fiber orientation;reinforcement;finite element analysis;
 Language
English
 Cited by
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Post-cracking behavior of UHPC on the concrete members reinforced by steel rebar,;;

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A Review on Structural Behavior, Design, and Application of Ultra-High-Performance Fiber-Reinforced Concrete,;;

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1.
A Review on Structural Behavior, Design, and Application of Ultra-High-Performance Fiber-Reinforced Concrete, International Journal of Concrete Structures and Materials, 2016, 10, 2, 125  crossref(new windwow)
2.
Post-cracking behavior of UHPC on the concrete members reinforced by steel rebar, Computers and Concrete, 2016, 18, 1, 139  crossref(new windwow)
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Comparative flexural behavior of ultra-high-performance concrete reinforced with hybrid straight steel fibers, Construction and Building Materials, 2017, 132, 219  crossref(new windwow)
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Buckling of concrete columns retrofitted with Nano-Fiber Reinforced Polymer (NFRP), Computers and Concrete, 2016, 18, 5, 1053  crossref(new windwow)
5.
Experimental and numerical study of the flexural behaviour of ultra-high performance fibre reinforced concrete beams, Construction and Building Materials, 2017, 138, 12  crossref(new windwow)
6.
Mechanical and structural behaviors of ultra-high-performance fiber-reinforced concrete subjected to impact and blast, Construction and Building Materials, 2017, 149, 416  crossref(new windwow)
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