Search

To investigate the serviceability conditions of High Strength Concrete (HSC) beams, the total number of 6 beams (L = 2 m, b = 0.2 m, h = 0.3 m) heavily reinforced with different ratios of [RHO] and [RHO]' were cast and tested under bending load. During the test the concrete and steel strains, deflection and crack width are measured at different beam locations. Based on these experimental readings, the bending rigidities (EI) of (HSC) beams are defined and the results are compared with the different available theoretical methods. Key words: HSC beams, different ratios of [RHO] and [RHO]', serviceability conditions, (EI), INTRODUCTION Despite a large number of investigations (1-6) carried out in the past on flexural behavior of high strength concrete (HSC) beams, controversy still remains with regard to some vital [...]

The use of externally bonded composite sheets or laminates is by now a diffuse technique to strengthen existing RC structures. However, some aspects of flexural condition still need experimental and numerical analysis; furthermore, especially for serviceability checks, there is a lack of code provisions. Six reinforced high strength concrete (HSC) beams strengthened with FRP sheets were fabricated and tested, the finite element (FE) models adopted by ANSYS was performed to examine the structural behavior of tested beams was performed. A comparison between the finite element analysis results and the experimental data available on the specimens was made and by using trial and error method, the finite element model was calibrated. Six under-reinforced concrete beams were fabricated and tested to failure. With the exception of the control beam, one or four layers of CFRP were applied to the specimens. The structural response throughout the loading regime was primarily captured in terms of the load deflection behavior. The load deflection plots obtained from numerical study show good agreement with the experimental results. The serviceability characteristics of the test beams were evaluated in terms of the crack width, deflection and stress in steel and concrete. The crack patterns in the beams are also presented. Keywords: Finite Element Model, FRP, HSC, Serviceability, INTRODUCTION The high strength-to-weight ratio, resistance to electro-chemical corrosion, larger creep strain, good fatigue strength, potential for decreased installation costs and repairs due to lower weight in comparison with steel, [...]