FINITE ELEMENT MODELLING OF STRENGTHENED SIMPLE BEAMS USING ANSYS

CIVIL ENGG

An experimental study was undertaken to establish the relationship between compressive strength with Splitting Tensile Strength and Modulus of Elasticity of Geopolymer Concrete. The stress - strain curve of OPC concrete originally proposed by Popovers is validated for Geopolymer concrete with some modification in curve fitting factor. The stress - strain behavior of Geopolymer concrete using sand and M-sand was studied and compared with the experimental investigation. The beams were made with Geopolymer concrete having compressive strength in the range of M20 - M35 by heat curing as well as ambient curing using river sand and M- sand. The experimental ultimate moment was found to be about 40- 60 % higher than the predicted ultimate moment. Due to the high stiffness of reactive Geopolymer concrete, the actual deflections of the beams were found to be slightly lower than the allowable values under service loads. The observed crack widths under service loads were within acceptable limits. It was found that GPC made with sand and M-Sand had better structural integrity. Hence, there is a high potential to produce GPC using sand and M-Sand. Design examples as well as comparison of test results with Numerical Analysis using ANSYS 13.0 are presented in this thesis

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