Abstract

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.

Highlights

  • The realistic, practical modelling of steel and electro-chemical corrosion, larger creep strain, good reinforced concrete beams is one of the most important fatigue strength, potential for decreased installation problems in structural analysis

  • The finite element solution of an engineering problem is that emergence of high strength epoxies has enhanced a set of governing algebraic equations is established the feasibility of using CFRP sheets and carbon fiber which are solved with the help of a digital fabric for repair and rehabilitation

  • As a result compared to a beam reinforced with steel only, beams reinforced with steel and strengthening with CFRP have adequate deformation capacity in serviceability limit state

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Summary

INTRODUCTION

Strength of concrete beams bonded with various types of FRP composites [11, 12]. The realistic, practical modelling of steel and electro-chemical corrosion, larger creep strain, good reinforced concrete beams is one of the most important fatigue strength, potential for decreased installation problems in structural analysis. The behavior of concrete obey Hooke's law throughout the loading regime It is beams strengthened with externally bonded steel plates [3], FRP plates [4,5,6], carbon fiber fabric [7] and GFRP sheets [8] was studied both experimentally and analytically. In this paper an attempt has been made with the ANSYS software to bring into focus the versatility and powerful analytical capabilities of nonlinear FE techniques by objectively modelling the complete response of test beams. The objective of this investigation is to study the effectiveness of FRP sheets on serviceability of reinforced high strength concrete (HSC) beams.

MODELLING METHODOLOGY AND FINITE ELEMENT ANALYSIS APPROACH
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