Numerical investigation on effects of steel fibers content on flexural behavior of UHPCC

Halimi, Mohamed Taher; Kioumarsi, Mahdi; Bakhshi, H.; Sarkardeh, Hamed

doi:10.1201/9780429426506-242

Cited by 1 publication

(1 citation statement)

References 30 publications

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“…Fibers are mainly divided into synthetic substances and natural substances. Discontinuous discrete fibers are fully integrated into concrete mixture in a random direction, which has significant advantages for the performance of reinforced concrete members [29][30][31][32][33][34] and reduced reinforcement congestion to a certain extent [35][36][37]. Smarzewski [38,39] studied the positive synergistic effect of steel and polypropylene fiber in reinforced concrete deep beams to replace conventional steel reinforcement.…”

Section: Introductionmentioning

confidence: 99%

Seismic Performance of Steel Fiber Reinforced High–Strength Concrete Beam–Column Joints

Shi

Zhang

et al. 2021

Materials

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In high–strength concrete, the reinforcement concentration will cause some problems in the beam–column joints (BCJs) due to a large amount of transverse reinforcement. Hence, the main object of this paper is to prevent the reinforcement concentration and reduce the amount of transverse reinforcement in the BCJs through the ideal usage of steel fibers and reinforced high–strength concrete. Pseudo–static tests on seven specimens were carried out to investigate and evaluate the seismic performance of beam–column joints in steel fiber reinforced high–strength concrete (SFRHC). Test variables were steel fiber volume ratio, concrete strength, the stirrup ratio in the core area, and an axial compression ratio of the column end. During the test, the hysteresis curves and failure mode were recorded. The seismic indicators, such as energy dissipation, ductility, strength, and stiffness degradation, were determined. The experimental results indicated that the failure modes of SFRHC beam–column joints mainly included the core area failure and the beam end bending failure. With the increase in stirrup ratio, volume ratio of steel fiber, and axial compression ratio in the core area, both the ductility and energy consumption of beam–column joints increased, while the opposite was true for concrete strength.

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