Flexural behavior of RC continuous T-beams reinforced with hybrid CFRP/ steel bars (experimental and numerical study)

Abstract

This study presents experimental and numerical investigations to understand the response and failure of hybrid RC continuous T-beams reinforced in flexure by both Carbon Fiber Reinforced Polymer (CFRP) bars and steel bars at sagging and hogging regions. Three RC continuous T-beams were constructed experimentally and studied to discuss three parameters which are the type of reinforcement material, the relation between sagging and hogging reinforcement, and the moment redistribution. The control beam was reinforced with steel rebars that have been designed to fail in flexure. The second beam was reinforced with hybrid CFRP/ steel bars at the sagging and hogging regions. The sagging region of the third one was reinforced with steel bars while the hogging region was reinforced with CFRP bars. All critical sections at the tested specimens are designed to have the same axial stiffness for the reinforcement bars. Experimental results revealed that the moment redistribution ratio and mode of failure depend on the type of reinforcement bars and using the hybrid bars at both critical regions helped to control the serviceability limits of the beams. This study also suggests and validates a 3D 216

Finite Element Analysis of Glass Fiber-Reinforced Polymer-(GFRP) Reinforced Continuous Concrete Beams

“…Furthermore, the open and closed shear transfer coefficients were assigned as 0.2 and 0.8. Finally, the Poisson's ratio of concrete was assigned by 0.2 based on the current literature review [11,[26][27][28], which agreed that the concrete's Poisson ratio should donate by 0.2 when defining concrete inside the finite element software such as ANSYS.…”

Bending moments redistribution in two‐span reinforced concrete beams reinforced with FRP bars based on collected data research

“…Statistical analysis of the degree of redistribution was finally limited to publications, 3,6,8,10,11,14,[16][17][18][19][20][21] in which redistribution of moments from the support to the span was most common (Figure 5a). The degree of bending moments redistribution β for Figure 5a is calculated in span, therefore, β > 0 means redistribution to span.…”

“…This is the reason for the significant effect of the bending moments redistribution in the multi-span beams and slabs reinforced with FRP bars. The issue of redistribution in beams reinforced with FRP bars or hybrid steel-FRP reinforcement has already been described in publications, [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] but there are still many inaccuracies regarding the adhesion of reinforcement to concrete, degree of reinforcement, modulus of elasticity, concrete compressive strength, shear reinforcement and interaction of all those parameters combined.…”

Experimental and Numerical Study on the Influence of Stress Concentration on the Flexural Stability of an Aluminium Hollow Tube

“…The material properties used in the experimental approach and the analytical approach were also used for the numerical analysis. Each and every specimen was tested numerically for different support spans under static flexural analysis [ 8 , 10 , 11 , 18 , 19 , 20 ]. The experimental bending load was applied to the specimen, and the maximum deflection was noted from the ANSYS results in order to confirm the accuracy of the test output.…”