PSI - Issue 54

Rami A. Hawileh et al. / Procedia Structural Integrity 54 (2024) 287–293 Hawileh et al./ Structural Integrity Procedia 00 (2019) 000 – 000

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the existing equations in the literature. Thus far, very few studies have been conducted using bending tests. The aim of this study is to investigate the effect of increasing the number of anchors for end-anchored RC beams. Three large scale beams were cast and tested under a four-point bending test. All beam specimens were strengthened with CFRP sheets, and one was left unanchored. The other two specimens were anchored with one and two anchors at each end, respectively. The test results in terms of load-deflection curves, failure modes, and load-strain were presented and analyzed. 2. Experimental Program 2.1. Beam specimens The experimental program consists of a total of three RC beams, the first one is the strengthened unanchored specimen (BU). The second and third specimens (A2 and A4) are anchored with one and two anchors at each end, respectively. The beams had a span of 2 m and a width of 200 mm as shown in Fig. 1. The total height of the beams was 250 mm with an effective depth of 204 mm. They were reinforced with 2Ø12 rebars in tension and 2Ø8 bars in compression. The shear reinforcement consists of Ø8 stirrups at 100 mm spacing. The flexural strengthening of the beams consists of one ply of CFRP bonded to the tension side (bottom of the beams). The CFRP sheets are 150 mm in width and 1600 mm in length and are bonded to the concrete at a distance 200 mm away from each end. In addition, CFRP anchors were installed in predrilled holes 300 mm away from each end of the beam. The anchors had a dowel diameter, embedment depth, and fan angle of 14 mm, 80 mm, and 120 mm in both beams (A2 and A4), respectively.

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Fig. 1. (a) details of the RC tested beams, specimen BU (b) specimen A2 (c) specimen A4