Plain concrete possesses very low tensile strength, limited ductility and little resistance to cracking. Fibers glass-reinforced concrete supposed to improve the strain properties well as crack resistance, ductility, as flexural strength and toughness. This paper aims to predict the flexural behavior of fiber-glass reinforced concrete and optimize the beam design by applying woven layer in M35 grade concrete using finite element method. The several techniques were implemented to study flexural performance, woven position on bottom, middle and upper surface and several woven thickness layers employed to investigate flexural performance such as 5, 10, 20, 30, 40 and 50 mm for beam size of 100 × 100 × 500 mm. It found that the flexural strength increased by positioned the woven on the bottom side and it given the improvement in designing when the layer thickness of fiber varied. It is because the fiber usually reduces the brittleness of concrete by providing post cracking ductility and increase toughness. The difference flexural strength between 50mm and 40mm thickness of fiberglass is about 1.29%.
The models are predicting and analyzing on compressive and flexural testing by considering fiber reinforcement embedded in confinement concrete. In this work, steel 4340 fiber with high aspect ratio was developed in unique random spline shape and randomly disperse in confinement concrete. Fibers designed in 15.5mm of average length and amount were varied in range of 50 to 200 and 250 to 1000 for compressive and flexural testing, respectively. Both varied orientation and random dispersion of fiber were developed using MATLAB before embedded and analyzed in Ansys Workbench. The finite element model was validated in initial results on plain concrete prior study in influence of confining and fibers to structure. The model proposed showed that confining reinforcement increasing ductility and large deflections in structure testing. In addition, fibers as reinforcement slightly increases in strength for both compressive and flexural in certain number. These method reinforcement was help warning of failure prior to complete failure that use in construction material.
This paper presents a comparison with experimental data of CFRP confined concrete column damage. The study investigates the behaviour of CFRP confined concrete beams against the experimental results. It also investigates the influence of different parameters on the behaviour of the FRP confined concrete column. The ABAQUS code was used to develop finite element models for simulation of the damage behaviour of the beams. The concrete was modelled using a plastic-damage model which is a perfect bond model and were evaluated for the concrete-FRP confinement interface. The results showed that when the thickness of carbon-fibre reinforced plastics (CFRP) proportional to the load capacity of the beam for both shear and compressive strength. The maximum load increases with an incremental of CFRP thickness. From the simulation results, the load- deflection relationships have been analysed and the FEM results agreed well with the experiments data. Finally, the study shows that the differences between the results of finite element analysis and experimental tests are in an acceptable range.
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