Analysis of Time-Dependent Behaviour of Concrete Beams Prestressed with FRP Tendons
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Published:2001
X.W. Zou, R.I. Gilbert, N. Gowripalan, 2001. "Analysis of Time-Dependent Behaviour of Concrete Beams Prestressed with FRP Tendons", FRPRCS-5: Fibre-reinforced plastics for reinforced concrete structures Volume 1: Proceedings of the fifth international conference on fibre-reinforced plastics for reinforced concrete structures, Cambridge, UK, 16–18 July 2001, Chris J. Burgoyne
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In this paper, analyses are presented for determining the short-term and time-dependent behaviour of fully or partially prestressed concrete beams with Fibre Reinforced Polymer (FRP) tendons under sustained bending and axial force. The Age-adjusted Effective Modulus Method (AEMM) is used to model the creep behaviour in the concrete and the relaxation in the FRP prestressing tendons. The analytical values are compared to the test results of prestressed concrete beams containing carbon fibre rods (CFRP) or aramid fibre rods (AFRP) under service load condition. The comparisons include the change of the curvature and the deflection with time. A tension-stiffening model proposed by Gilbert (1988) was adopted for the cracked beams, and this model was then modified using the experimental results by introducing a material parameterβ3 to the model in order to use it for beams prestressed by FRP tendons.
INTRODUCTION
SHORT-TERM ANALYSIS
TIME-DEPENDENT ANALYSIS OF CROSS-SECTION
DEFLECTION CALCULATION
COMPARISONS OF THEORETICAL PREDICTIONS TO EXPERIMENTAL RESULTS
CONCLUSIONS
REFERENCES
