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Punching Shear Characterization of Steel Fiber-Reinforced Concrete Flat Slabs

Abbas H. Mohammed, Huda M. Mubarak, Ali K. Hussein, Taymour Z. Abulghafour, Dia Eddin Nassani

Abstract


Punching shear failure in thin slabs under concentrated loads can cause shear stresses near columns. The use of steel fiber is a practical way to improve a slab-column connection's punching strength and deformation capacity. In this study, the capacity and behavior of steel fiber-reinforced concrete flat slabs are examined under punching shear force. Ten small-scale flat slabs were tested, eight of which had steel fiber and two without. Two parameters are studied in this paper, which are the fiber volume ratio (from 0% to 2%) and the stub column load shape (circle and square). The test results include the concrete compressive strength, crack patterns, punching shear, and load-defection behavior of the slabs. Based on the experimental results, it was found that the punching shear capacity of slabs with steel fiber (S5) increased by 21.8% compared to slabs without steel fiber (S1), and the slabs with steel fiber had more ductility compared to the slabs without fiber.

 

Doi: 10.28991/HIJ-2022-03-04-08

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Keywords


Flat Slab; Steel Fiber Reinforced Concrete; Crack; Punching Shear Resistance; Concrete Structures.

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DOI: 10.28991/HIJ-2022-03-04-08

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