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Flexural Response of Reinforced Concrete Beams Using Various Cementitious Materials

Karnati, Vijayasenareddy
http://rave.ohiolink.edu/etdc/view?acc_num=toledo1470227287

Abstract Details

2016, Master of Science, University of Toledo, Civil Engineering.
The present study explores the effect of fly ash, recycled aggregate concrete (RAC), ultra-high strength concrete (UHSC) and self-compacting concrete (SCC) on the performance of reinforced concrete beams. The nonlinear finite element analysis using ANSYS software program was employed to model RC beams. A smeared crack approach was used for the concrete in all finite element models. The compressive and tensile strengths, modulus of elasticity, and Poisson's ratio for various cementitious materials required in the finite element analysis modeling were collected from the literature. Two different beams were considered; the first beam made with the normal strength reinforced concrete and; the second beam made with high strength SCC, were validated and compared to experimental results of existing studies in the literature. The first validated RC beam was investigated for the flexural response of concrete beams made with mixtures of 25% fly ash, ultra-high strength concrete, 50 and 100% recycled concrete aggregates, and normal strength self-compacting concrete. For the second validated high strength SCC beam, the effects of silica nanopowder and silica fumes were also studied. The results obtained from developed models of RC beam finite element analysis were compared to the experimental results and they were in good agreement. From parametric studies on the first validated beam, concrete mixtures of 25% fly ash and 50 and 100% recycled concrete aggregates, and normal strength self-compacting concrete could provide similar ultimate load and displacement capacities as the control beam. However, the RC beam with ultra-high strength concrete showed a higher gain in load capacity and lower displacement was observed at the mid-span due to additional stiffness. For the second validated high strength SCC beam, under approximately the same ultimate load level, the deflection at mid-span was lowest when silica nanopowder and silica fumes were combined. The findings contribute to providing researchers with necessary information that influence the design of RC beams using waste materials or by-products in concrete as well as high strength concrete mixtures.
Azadeh Parvin (Committee Chair)
Mark Pickett (Committee Co-Chair)
Liangbo Hu (Committee Member)
99 p.
Civil Engineering

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Citations

  • Karnati, V. (2016). Flexural Response of Reinforced Concrete Beams Using Various Cementitious Materials [Master's thesis, University of Toledo]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1470227287

    APA Style (7th edition)

  • Karnati, Vijayasenareddy. Flexural Response of Reinforced Concrete Beams Using Various Cementitious Materials. 2016. University of Toledo, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=toledo1470227287.

    MLA Style (8th edition)

  • Karnati, Vijayasenareddy. "Flexural Response of Reinforced Concrete Beams Using Various Cementitious Materials." Master's thesis, University of Toledo, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1470227287

    Chicago Manual of Style (17th edition)

toledo1470227287
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This open access ETD is published by University of Toledo and OhioLINK.