engleski

Numerical Investigations of RC Beams Strengthened with CFRP Strips

In the engineering practice, the strengthening of the reinforced concrete (RC) structures due to the need for additional reinforcement or retrofitting damaged parts the use of fiber reinforced polymers (FRP) has become very efficient. This paper presents the numerical and experimental investigations of RC beams strengthened with carbon fiber reinforced polymers (CFRP). Two sets of RC beams have been tested. The first set consist of two identical RC beams (L×b×h = 1000 × 100 × 200 mm) made of concrete C30/37, reinforced with 2ϕ6 in the upper zone and 2ϕ10 in the lower zone, with stirrups and the other beam was strengthened with CFRP strip throughout the whole bottom, [1]. The second set consist of three identical RC beams (L×b×h = 1000 × 100 × 200 mm) made of concrete C25/30, reinforced with 2ϕ10 in both zones, upper and lower, with stirrups. The second beam was strengthened with CFRP strip throughout the whole bottom while the third beam was strengthened only in the mid 500 mm, [2]. Numerical analyses have been performed with different numerical models regarding three computer programmes: SCIA Engineer 14 [3], ANSYS [4] and PRECON3D [5]. The comparisons between numerical and experimental results will be shown and appropriate conclusions, regarding used numerical models advantages and disadvantages, will be drawn.

numerical investigations, rc beam, strengthening, cfrp strip

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