Element Analysis Of Concrete Beams Research Articles

Effect of tension-stiffening on finite element analysis of glass fibre reinforced polymer-reinforced concrete members

Glass fibre reinforced polymer (GFRP) bars have different mechanical properties than conventional steel reinforcing bars. Concrete members reinforced with these bars behave differently than steel reinforced members. Tension stiffening is the properties of carrying tension in between cracks of reinforced concrete members. This paper presents the results of an investigation into the effect of tension stiffening in nonlinear finite element analysis of concrete beam reinforced with glass fibre reinforced polymer (GFRP) bars. The beam that was investigated was identical to a test beam. The test beam was reinforced in longitudinal direction and there was no shear reinforcement, i.e., shear critical beam. The influence of tension stiffening on different behavioural aspects including load deflection behaviour, ultimate load, and deflection are discussed along with a comparison with the test results of the beam. The analysis was carried out using commercial finite element analysis (FEA) software, ABAQUS. The concrete model was calibrated before using in the analysis. The results revealed that the tension stiffening model has great influence on FEA of GFRP reinforced beam and some of the models are not suitable for FEA of shear critical GFRP reinforced concrete beam.

Nonlinear Finite Element Analysis of Concrete Beam Reinforced with Fiber Reinforced Polymer (FRM)

Due to the corrosion that occurs in internal steel reinforcement; many of steel reinforced concrete structure are at risk of collapse. The budget that will be developed to address this risk in terms of replacement or repair of damaged concrete structures will be very high for the owner or responsible authorities. Alternatives to bare steel have been used including stainless steel, galvanized steel, epoxy-coated steel and cathodic protection, with limited effectiveness. The characteristics of fiber reinforced polymer (FRP) bars like the high tensile strength, inability to corrode, and light weight; it has become the focus of decision-makers to use it instead of steel in internal reinforcement for future concrete structures. In this research, we have investigated flexural behavior in reinforced concrete beams with bars from bars from carbon fiber-reinforced polymer (CFRP), bars from high tensile steel (HTS), and glass fiber-reinforced polymer (GFRP) under static load. Two groups from samples were used, in the first group will show the effect of the type of reinforcement. In the second group will show the effect of the type of reinforcement with different concrete strength. It found these kinds of materials to be very is effective to deal with analysis and the proposed simulation of the material in this study are able of forecast the real behavior of reinforced concrete beam by FRP bars in terms of failure load, and load-deflection behavior.

Finite Element Analysis of Concrete Beam under Flexural Stresses Using Meso-Scale Model

Two dimensional meso-scale concrete modeling was used in finite element analysis of plain concrete beam subjected to bending. The plane stress 4-noded quadrilateral elements were utilized to model coarse aggregate, cement mortar. The effect of aggregate fraction distribution, and pores percent of the total area – resulting from air voids entrapped in concrete during placement on the behavior of plain concrete beam in flexural was detected. Aggregate size fractions were randomly distributed across the profile area of the beam. Extended Finite Element Method (XFEM) was employed to treat the discontinuities problems result from double phases of concrete and cracking that faced during the finite element analysis of concrete beam. Cracking was initiated at a small notch located at the middle of the bottom face of the concrete beam. The response of plain concrete beam subjected to pure bending via two point load application was detected using (XFEM) analysis of meso-scale concrete model. Assuming full bond between aggregate particles, and mortar at interfacial zone, the flexural strength of plain concrete beam is increased when aggregate particles size is increased, so that bending and shear stress were affected by void percentage and aggregate particles distribution. The maximum deflection at midspan was increased when the aggregate particles size decreases.

The Temperature Field Finite Element Analysis of Concrete Beam after Fire Based on ABAQUS

Based on ABAQUS software platform, the author analyzed the concrete beam’s temperature field by the finite element numerical simulation technology,and got the temperature field and the measuring temperature-time curve for the beam of different sections.The calculated results made a perfect coincide with on-site test ,which proved that ABAQUS simulated temperature field of concrete component has certain precision .Thus, the results provided the references for those who want to do more in-depth studies of the concrete beam’s mechanical properties after fire and reinforcement design.

Finite Element Analysis of Concrete Beams Reinforced With Fiber Reinforcing Bars

Based on bending fiber reinforced concrete beam, through the nonlinear analysis, the paper discuss the constitutive models of concrete and reinforcement, the properties of their element and the models of concrete beams reinforced with FRP bars. Using nonlinear analysis and comparing numerical results with experimental results, the fiber reinforced concrete beam bending terminal numerical model constructed in this paper can simulate the entire process of internal force and deformation of fiber reinforced concrete beams, and describe cracks in the formation and extension and the failure process and failure form, which also can provide enough precision to the practical engineering and scientific research. Meanwhile, the finite element computation model verified by test can provide more reactive information to effective structure computation model.

Finite element analysis of concrete beams : Nam, Chung-Hyun and Salmon, C. G.J. of the Struct. Div. of the Am. Soc. of Civil Eng. Vol 100, No ST12 (Dec. 1974) pp 2419–2432

Finite element analysis of concrete beams : Nam, Chung-Hyun and Salmon, C. G.J. of the Struct. Div. of the Am. Soc. of Civil Eng. Vol 100, No ST12 (Dec. 1974) pp 2419–2432