Behavior of Postfabricated RC Beams under Monotonic Transverse Loading

Aykaç, Sabahattin; Jamal, Rohullah; Özbek, Eray; Kalkan, İlker; Aykaç, Bengi

doi:10.1061/(asce)st.1943-541x.0002220

Cited by 2 publications

(1 citation statement)

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“…In another attempt to apply the hybrid reinforcing systems, experimental investigations were carried out on FSRC girders [14], and the results recommended a range for the Af/As ratio to be from 1.0 to 2.33 to prevent the early rupture of FRP bars and enhance the post-yield strength as well as stiffness. For RC beams with holes, the structural performance has been addressed in many studies [15][16][17][18][19][20][21][22][23][24][25][26]. The common conclusions of these studies were as follows:…”

Section: Introductionmentioning

confidence: 99%

Optimal Shape and Size of Holes in Hybrid Reinforced Concrete Beams

Yehia,

mahmoud

2024

SVU-International Journal of Engineering Sciences and Applicati

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Hybrid reinforced concrete structures are efficient systems that include steel and fiber-reinforced polymer (FRP) reinforcement advantages, which are called fiber steel reinforced concrete (FSRC). On the other hand, passing service pipes through creating holes in reinforced concrete (RC) beams completely changes their structural behavior. Besides, RC beams with holes require rigorous nonlinear finite element (NLFE) analysis which is not typically done by design engineers. The behavior of simply-supported FSRC beams (hybrid reinforced with basalt FRP (BFRP) and steel bars) having two end holes under the effect of four-point bending loading tests was investigated. Also, NLFE models were implemented in an extensive parametric study. The studied parameters included (1) hole shapes: circular, square, and rectangular shapes; (2) height/diameter: ho=0.2h, 0.3h, 0.4h, and 0.5h; and length: Lo=0.3h, 0.5h, 0.7h, and 1.0h (h: overall beam depth). Compared to a similar beam without holes, the holes produce reductions of up to 53%, 44%, 85%, 64%, and 58% in the beam's cracking load, ultimate strength, absorbed energy, post-cracking stiffness, and post-yield stiffness, respectively (the lowest in cases of circular holes). In order to obtain the beneficial behavior of FSRC beams, it is recommended to drill the beam with a hole size diameter of up to 0.4h and up to a hole size length of 0.3h for square holes. On the contrary, the effect of hybrid reinforcement gains less significant enhancement in the case of the rectangular holes.

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