Numerical Analysis on Bond Strength of FRP Re-bars under Elevated Temperature

M H Jamalan,Dr F Fu

doi:10.1088/1757-899x/371/1/012013

M H Jamalan, Dr F Fu

Open Access

https://doi.org/10.1088/1757-899x/371/1/012013

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Abstract

The bond behaviour between fibre reinforced polymer (FRP) and concrete at a different temperature, ranging from room temperature (20°C) to high temperature of up to 300°C, are modelled using the FEA in this paper. Four different commercially produced FRPs with different bond treatments and the bond properties were study in this temperature range. It is observe that when the temperature increases from 20°C to 300°C the FRP’s bond strength reduced between 80 and 90%, however, this reduction for steel is only 38% at this temperature range. Also as the temperature increased a reduction in the bond stiffness has occurred.

Highlights

In the past few years, the use of Fibre reinforced polymers (FRP) for reinforcing the concrete structures, where steel reinforcement is not suitable because of a highly corrosive environment or where electromagnetic transparency of the structure is required, has been increased
High-performance inorganic and organic fibres, such as glass, carbon, and aramid fibres, are being used in fibre reinforced polymer (FRP) re-bars [2]. These fibres exhibit good mechanical property retention in the elevated temperature range considered in this work [3], and it is expected that failure of the rebars at high temperature will occur first in the polymer matrix [4], studied the properties of the FRPs at high temperatures, as the result of these test on a variety of the FRP re-bars they found that the tensile strength of glass and carbon FRP re-bars approximately reduced 20% at a temperature of 250 ̊C
Different types of FRP re-bars were tested for pull-out at temperatures of up to

Summary

Introduction

In the past few years, the use of Fibre reinforced polymers (FRP) for reinforcing the concrete structures, where steel reinforcement is not suitable because of a highly corrosive environment or where electromagnetic transparency of the structure is required, has been increased. These fibres exhibit good mechanical property retention in the elevated temperature range considered in this work (up to 250 ̊C) [3], and it is expected that failure of the rebars at high temperature will occur first in the polymer matrix [4], studied the properties of the FRPs at high temperatures, as the result of these test on a variety of the FRP re-bars they found that the tensile strength of glass and carbon FRP re-bars approximately reduced 20% at a temperature of 250 ̊C This reduction was more significant for aramid FRP re-bars and it was about 60% at 250 ̊C. Wolff and Miesseler (1993) [6] proposed giving pre-stressed concrete members reinforced with glass FRP tendons the same

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Conclusion